[R4R] bep3 module audit revisions (#505)

* most audit revisions

* remove expected income

* update begin block spec

* filter queryAtomicSwaps, add queryAssetSupplies

* update old address

* update test

* Remove legacy method

* remove legacy comment

* address PR comments

* IsValid for SwapDirection, SwapStatus

* fix rng logging

* query asset supplies

* return [64]byte from rng

* remove cross chain field from MsgCreateAtomicSwap

* move swap filtering to querier

* rename Limit field to SupplyLimit

x/bep3/abci.go

@@ -4,15 +4,9 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 )
 
-// BeginBlocker runs at the start of every block
+// BeginBlocker on every block expires outdated atomic swaps and removes closed
+// swap from long term storage (default storage time of 1 week)
 func BeginBlocker(ctx sdk.Context, k Keeper) {
-	err := k.UpdateExpiredAtomicSwaps(ctx)
+	k.UpdateExpiredAtomicSwaps(ctx)
-	if err != nil {
+	k.DeleteClosedAtomicSwapsFromLongtermStorage(ctx)
-		panic(err)
-	}
-
-	err = k.DeleteClosedAtomicSwapsFromLongtermStorage(ctx)
-	if err != nil {
-		panic(err)
-	}
 }

x/bep3/abci_test.go

@@ -52,22 +52,22 @@ func (suite *ABCITestSuite) ResetKeeper() {
 	var randomNumbers []tmbytes.HexBytes
 	for i := 0; i < 10; i++ {
 		// Set up atomic swap variables
-		expireHeight := int64(360)
+		expireHeight := uint64(360)
 		amount := cs(c("bnb", int64(100)))
 		timestamp := ts(i)
 		randomNumber, _ := bep3.GenerateSecureRandomNumber()
-		randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 
 		// Create atomic swap and check err to confirm creation
 		err := suite.keeper.CreateAtomicSwap(suite.ctx, randomNumberHash, timestamp, expireHeight,
 			suite.addrs[0], suite.addrs[i], TestSenderOtherChain, TestRecipientOtherChain,
-			amount, amount.String(), true)
+			amount, true)
 		suite.Nil(err)
 
 		// Store swap's calculated ID and secret random number
 		swapID := bep3.CalculateSwapID(randomNumberHash, suite.addrs[0], TestSenderOtherChain)
 		swapIDs = append(swapIDs, swapID)
-		randomNumbers = append(randomNumbers, randomNumber.Bytes())
+		randomNumbers = append(randomNumbers, randomNumber[:])
 	}
 	suite.swapIDs = swapIDs
 	suite.randomNumbers = randomNumbers
@@ -105,7 +105,7 @@ func (suite *ABCITestSuite) TestBeginBlocker_UpdateExpiredAtomicSwaps() {
 		{
 			name:            "after deletion",
 			firstCtx:        suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + 400),
-			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + 400 + bep3.DefaultLongtermStorageDuration),
+			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + 400 + int64(bep3.DefaultLongtermStorageDuration)),
 			expectedStatus:  bep3.NULL,
 			expectInStorage: false,
 		},
@@ -166,7 +166,7 @@ func (suite *ABCITestSuite) TestBeginBlocker_DeleteClosedAtomicSwapsFromLongterm
 			name:            "no action with long storage duration",
 			firstCtx:        suite.ctx,
 			action:          NULL,
-			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + bep3.DefaultLongtermStorageDuration),
+			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + int64(bep3.DefaultLongtermStorageDuration)),
 			expectInStorage: true,
 		},
 		{
@@ -180,7 +180,7 @@ func (suite *ABCITestSuite) TestBeginBlocker_DeleteClosedAtomicSwapsFromLongterm
 			name:            "claim with long storage duration",
 			firstCtx:        suite.ctx,
 			action:          Claim,
-			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + bep3.DefaultLongtermStorageDuration),
+			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + int64(bep3.DefaultLongtermStorageDuration)),
 			expectInStorage: false,
 		},
 		{
@@ -194,7 +194,7 @@ func (suite *ABCITestSuite) TestBeginBlocker_DeleteClosedAtomicSwapsFromLongterm
 			name:            "refund with long storage duration",
 			firstCtx:        suite.ctx,
 			action:          Refund,
-			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + bep3.DefaultLongtermStorageDuration),
+			secondCtx:       suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + int64(bep3.DefaultLongtermStorageDuration)),
 			expectInStorage: false,
 		},
 	}
@@ -214,12 +214,12 @@ func (suite *ABCITestSuite) TestBeginBlocker_DeleteClosedAtomicSwapsFromLongterm
 			case Refund:
 				for _, swapID := range suite.swapIDs {
 					swap, _ := suite.keeper.GetAtomicSwap(tc.firstCtx, swapID)
-					refundCtx := suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + swap.ExpireHeight)
+					refundCtx := suite.ctx.WithBlockHeight(suite.ctx.BlockHeight() + int64(swap.ExpireHeight))
 					bep3.BeginBlocker(refundCtx, suite.keeper)
 					err := suite.keeper.RefundAtomicSwap(refundCtx, suite.addrs[5], swapID)
 					suite.Nil(err)
 					// Add expire height to second ctx block height
-					tc.secondCtx = tc.secondCtx.WithBlockHeight(tc.secondCtx.BlockHeight() + swap.ExpireHeight)
+					tc.secondCtx = tc.secondCtx.WithBlockHeight(tc.secondCtx.BlockHeight() + int64(swap.ExpireHeight))
 				}
 			}
 

x/bep3/alias.go

@@ -13,7 +13,6 @@ const (
 	AttributeKeyAtomicSwapIDs      = types.AttributeKeyAtomicSwapIDs
 	AttributeKeyClaimSender        = types.AttributeKeyClaimSender
 	AttributeKeyDirection          = types.AttributeKeyDirection
-	AttributeKeyExpectedIncome     = types.AttributeKeyExpectedIncome
 	AttributeKeyExpireHeight       = types.AttributeKeyExpireHeight
 	AttributeKeyRandomNumber       = types.AttributeKeyRandomNumber
 	AttributeKeyRandomNumberHash   = types.AttributeKeyRandomNumberHash
@@ -29,7 +28,6 @@ const (
 	CreateAtomicSwap               = types.CreateAtomicSwap
 	DefaultLongtermStorageDuration = types.DefaultLongtermStorageDuration
 	DefaultParamspace              = types.DefaultParamspace
-	DepositAtomicSwap              = types.DepositAtomicSwap
 	EventTypeClaimAtomicSwap       = types.EventTypeClaimAtomicSwap
 	EventTypeCreateAtomicSwap      = types.EventTypeCreateAtomicSwap
 	EventTypeRefundAtomicSwap      = types.EventTypeRefundAtomicSwap
@@ -61,7 +59,6 @@ var (
 	NewKeeper                  = keeper.NewKeeper
 	NewQuerier                 = keeper.NewQuerier
 	RegisterRoutes             = rest.RegisterRoutes
-	BytesToHex                 = types.BytesToHex
 	CalculateRandomHash        = types.CalculateRandomHash
 	CalculateSwapID            = types.CalculateSwapID
 	DefaultGenesisState        = types.DefaultGenesisState
@@ -83,7 +80,6 @@ var (
 	ErrSwapNotRefundable       = types.ErrSwapNotRefundable
 	GenerateSecureRandomNumber = types.GenerateSecureRandomNumber
 	GetAtomicSwapByHeightKey   = types.GetAtomicSwapByHeightKey
-	HexToBytes                 = types.HexToBytes
 	NewAssetSupply             = types.NewAssetSupply
 	NewAtomicSwap              = types.NewAtomicSwap
 	NewGenesisState            = types.NewGenesisState
@@ -98,8 +94,6 @@ var (
 	NewSwapStatusFromString    = types.NewSwapStatusFromString
 	ParamKeyTable              = types.ParamKeyTable
 	RegisterCodec              = types.RegisterCodec
-	Uint64FromBytes            = types.Uint64FromBytes
-	Uint64ToBytes              = types.Uint64ToBytes
 
 	// variable aliases
 	AbsoluteMaximumBlockLock        = types.AbsoluteMaximumBlockLock

x/bep3/client/cli/query.go

@@ -6,31 +6,43 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/spf13/cobra"
+	"github.com/cosmos/cosmos-sdk/client"
-
 	"github.com/cosmos/cosmos-sdk/client/context"
 	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
-
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
 	tmtime "github.com/tendermint/tendermint/types/time"
 
 	"github.com/kava-labs/kava/x/bep3/types"
 )
 
+// Query atomic swaps flags
+const (
+	flagInvolve    = "involve"
+	flagExpiration = "expiration"
+	flagStatus     = "status"
+	flagDirection  = "direction"
+)
+
 // GetQueryCmd returns the cli query commands for this module
 func GetQueryCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 	// Group bep3 queries under a subcommand
 	bep3QueryCmd := &cobra.Command{
 		Use:                        "bep3",
 		Short:                      "Querying commands for the bep3 module",
+		DisableFlagParsing:         true,
+		SuggestionsMinimumDistance: 2,
+		RunE:                       client.ValidateCmd,
 	}
 
 	bep3QueryCmd.AddCommand(flags.GetCommands(
 		QueryCalcSwapIDCmd(queryRoute, cdc),
 		QueryCalcRandomNumberHashCmd(queryRoute, cdc),
-		QueryGetAtomicSwapCmd(queryRoute, cdc),
 		QueryGetAssetSupplyCmd(queryRoute, cdc),
+		QueryGetAssetSuppliesCmd(queryRoute, cdc),
+		QueryGetAtomicSwapCmd(queryRoute, cdc),
 		QueryGetAtomicSwapsCmd(queryRoute, cdc),
 		QueryParamsCmd(queryRoute, cdc),
 	)...)
@@ -70,10 +82,10 @@ func QueryCalcRandomNumberHashCmd(queryRoute string, cdc *codec.Codec) *cobra.Co
 			if err != nil {
 				return err
 			}
-			randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+			randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 			// Prepare random number, timestamp, and hash for output
-			randomNumberStr := fmt.Sprintf("Random number: %s\n", randomNumber)
+			randomNumberStr := fmt.Sprintf("Random number: %s\n", string(randomNumber[:]))
 			timestampStr := fmt.Sprintf("Timestamp: %d\n", timestamp)
 			randomNumberHashStr := fmt.Sprintf("Random number hash: %s", hex.EncodeToString(randomNumberHash))
 			output := []string{randomNumberStr, timestampStr, randomNumberHashStr}
@@ -87,13 +99,13 @@ func QueryCalcSwapIDCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 	return &cobra.Command{
 		Use:     "calc-swapid [random-number-hash] [sender] [sender-other-chain]",
 		Short:   "calculate swap ID for the given random number hash, sender, and sender other chain",
-		Example: "bep3 calc-swapid 0677bd8a303dd981810f34d8e5cc6507f13b391899b84d3c1be6c6045a17d747 kava15qdefkmwswysgg4qxgcqpqr35k3m49pkx2jdfnw bnb1ud3q90r98l3mhd87kswv3h8cgrymzeljct8qn7",
+		Example: "bep3 calc-swapid 0677bd8a303dd981810f34d8e5cc6507f13b391899b84d3c1be6c6045a17d747 kava1l0xsq2z7gqd7yly0g40y5836g0appumark77ny bnb1ud3q90r98l3mhd87kswv3h8cgrymzeljct8qn7",
 		Args:    cobra.MinimumNArgs(3),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 
 			// Parse query params
-			randomNumberHash, err := types.HexToBytes(args[0])
+			randomNumberHash, err := hex.DecodeString(args[0])
 			if err != nil {
 				return err
 			}
@@ -137,6 +149,33 @@ func QueryGetAssetSupplyCmd(queryRoute string, cdc *codec.Codec) *cobra.Command
 	}
 }
 
+// QueryGetAssetSuppliesCmd queries AssetSupplies in the store
+func QueryGetAssetSuppliesCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
+	return &cobra.Command{
+		Use:     "supplies",
+		Short:   "get a list of all asset supplies",
+		Example: "bep3 supplies",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
+
+			res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetAssetSupplies), nil)
+			if err != nil {
+				return err
+			}
+
+			var assetSupplies types.AssetSupplies
+			cdc.MustUnmarshalJSON(res, &assetSupplies)
+
+			if len(assetSupplies) == 0 {
+				return fmt.Errorf("There are currently no asset supplies")
+			}
+
+			cliCtx = cliCtx.WithHeight(height)
+			return cliCtx.PrintOutput(assetSupplies)
+		},
+	}
+}
+
 // QueryGetAtomicSwapCmd queries an AtomicSwap by swapID
 func QueryGetAtomicSwapCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 	return &cobra.Command{
@@ -148,7 +187,7 @@ func QueryGetAtomicSwapCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 
 			// Decode swapID's hex encoded string to []byte
-			swapID, err := types.HexToBytes(args[0])
+			swapID, err := hex.DecodeString(args[0])
 			if err != nil {
 				return err
 			}
@@ -176,29 +215,97 @@ func QueryGetAtomicSwapCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
 
 // QueryGetAtomicSwapsCmd queries AtomicSwaps in the store
 func QueryGetAtomicSwapsCmd(queryRoute string, cdc *codec.Codec) *cobra.Command {
-	return &cobra.Command{
+	cmd := &cobra.Command{
 		Use:   "swaps",
-		Short:   "get a list of active atomic swaps",
+		Short: "query atomic swaps with optional filters",
-		Example: "bep3 swaps",
+		Long: strings.TrimSpace(`Query for all paginated atomic swaps that match optional filters:
+Example:
+$ kvcli q bep3 swaps --involve=kava1l0xsq2z7gqd7yly0g40y5836g0appumark77ny
+$ kvcli q bep3 swaps --expiration=280
+$ kvcli q bep3 swaps --status=(Open|Completed|Expired)
+$ kvcli q bep3 swaps --direction=(Incoming|Outgoing)
+$ kvcli q bep3 swaps --page=2 --limit=100
+`,
+		),
 		RunE: func(cmd *cobra.Command, args []string) error {
-			cliCtx := context.NewCLIContext().WithCodec(cdc)
+			bechInvolveAddr := viper.GetString(flagInvolve)
+			strExpiration := viper.GetString(flagExpiration)
+			strSwapStatus := viper.GetString(flagStatus)
+			strSwapDirection := viper.GetString(flagDirection)
+			page := viper.GetInt(flags.FlagPage)
+			limit := viper.GetInt(flags.FlagLimit)
 
-			res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetAtomicSwaps), nil)
+			var involveAddr sdk.AccAddress
+			var expiration uint64
+			var swapStatus types.SwapStatus
+			var swapDirection types.SwapDirection
+
+			params := types.NewQueryAtomicSwaps(page, limit, involveAddr, expiration, swapStatus, swapDirection)
+
+			if len(bechInvolveAddr) != 0 {
+				involveAddr, err := sdk.AccAddressFromBech32(bechInvolveAddr)
+				if err != nil {
+					return err
+				}
+				params.Involve = involveAddr
+			}
+
+			if len(strExpiration) != 0 {
+				expiration, err := strconv.ParseUint(strExpiration, 10, 64)
+				if err != nil {
+					return err
+				}
+				params.Expiration = expiration
+			}
+
+			if len(strSwapStatus) != 0 {
+				swapStatus := types.NewSwapStatusFromString(strSwapStatus)
+				if !swapStatus.IsValid() {
+					return fmt.Errorf("invalid swap status %s", strSwapStatus)
+				}
+				params.Status = swapStatus
+			}
+
+			if len(strSwapDirection) != 0 {
+				swapDirection := types.NewSwapDirectionFromString(strSwapDirection)
+				if !swapDirection.IsValid() {
+					return fmt.Errorf("invalid swap direction %s", strSwapDirection)
+				}
+				params.Direction = swapDirection
+			}
+
+			bz, err := cdc.MarshalJSON(params)
 			if err != nil {
 				return err
 			}
 
-			var atomicSwaps types.AtomicSwaps
+			cliCtx := context.NewCLIContext().WithCodec(cdc)
-			cdc.MustUnmarshalJSON(res, &atomicSwaps)
 
-			if len(atomicSwaps) == 0 {
+			res, height, err := cliCtx.QueryWithData(fmt.Sprintf("custom/%s/%s", queryRoute, types.QueryGetAtomicSwaps), bz)
-				return fmt.Errorf("There are currently no atomic swaps")
+			if err != nil {
+				return err
+			}
+
+			var matchingAtomicSwaps types.AtomicSwaps
+			cdc.UnmarshalJSON(res, &matchingAtomicSwaps)
+
+			if len(matchingAtomicSwaps) == 0 {
+				return fmt.Errorf("No matching atomic swaps found")
 			}
 
 			cliCtx = cliCtx.WithHeight(height)
-			return cliCtx.PrintOutput(atomicSwaps.String())
+			return cliCtx.PrintOutput(matchingAtomicSwaps.String()) // nolint:errcheck
 		},
 	}
+
+	cmd.Flags().Int(flags.FlagPage, 1, "pagination page of atomic swaps to to query for")
+	cmd.Flags().Int(flags.FlagLimit, 100, "pagination limit of atomic swaps to query for")
+	cmd.Flags().String(flagInvolve, "", "(optional) filter by atomic swaps that involve an address")
+	cmd.Flags().String(flagExpiration, "", "(optional) filter by atomic swaps that expire before a block height")
+	cmd.Flags().String(flagStatus, "", "(optional) filter by atomic swap status, status: open/completed/expired")
+	cmd.Flags().String(flagDirection, "", "(optional) filter by atomic swap direction, direction: incoming/outgoing")
+
+	return cmd
 }
 
 // QueryParamsCmd queries the bep3 module parameters

x/bep3/client/cli/tx.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/spf13/cobra"
 
+	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/client/context"
 	"github.com/cosmos/cosmos-sdk/client/flags"
 	"github.com/cosmos/cosmos-sdk/codec"
@@ -27,6 +28,9 @@ func GetTxCmd(cdc *codec.Codec) *cobra.Command {
 	bep3TxCmd := &cobra.Command{
 		Use:                        "bep3",
 		Short:                      "bep3 transactions subcommands",
+		DisableFlagParsing:         true,
+		SuggestionsMinimumDistance: 2,
+		RunE:                       client.ValidateCmd,
 	}
 
 	bep3TxCmd.AddCommand(flags.PostCommands(
@@ -41,23 +45,23 @@ func GetTxCmd(cdc *codec.Codec) *cobra.Command {
 // GetCmdCreateAtomicSwap cli command for creating atomic swaps
 func GetCmdCreateAtomicSwap(cdc *codec.Codec) *cobra.Command {
 	return &cobra.Command{
-		Use:   "create [to] [recipient-other-chain] [sender-other-chain] [timestamp] [coins] [expected-income] [height-span] [cross-chain]",
+		Use:   "create [to] [recipient-other-chain] [sender-other-chain] [timestamp] [coins] [height-span]",
 		Short: "create a new atomic swap",
-		Example: fmt.Sprintf("%s tx %s create kava1xy7hrjy9r0algz9w3gzm8u6mrpq97kwta747gj bnb1urfermcg92dwq36572cx4xg84wpk3lfpksr5g7 bnb1uky3me9ggqypmrsvxk7ur6hqkzq7zmv4ed4ng7 now 100bnb 100bnb 360 true --from validator",
+		Example: fmt.Sprintf("%s tx %s create kava1xy7hrjy9r0algz9w3gzm8u6mrpq97kwta747gj bnb1urfermcg92dwq36572cx4xg84wpk3lfpksr5g7 bnb1uky3me9ggqypmrsvxk7ur6hqkzq7zmv4ed4ng7 now 100bnb 360 --from validator",
 			version.ClientName, types.ModuleName),
-		Args: cobra.ExactArgs(8),
+		Args: cobra.ExactArgs(6),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			inBuf := bufio.NewReader(cmd.InOrStdin())
 			cliCtx := context.NewCLIContext().WithCodec(cdc)
 			txBldr := auth.NewTxBuilderFromCLI(inBuf).WithTxEncoder(utils.GetTxEncoder(cdc))
 
-			from := cliCtx.GetFromAddress() // same as KavaExecutor.DeputyAddress (for cross-chain)
+			from := cliCtx.GetFromAddress() // same as Kava executor's deputy address
 			to, err := sdk.AccAddressFromBech32(args[0])
 			if err != nil {
 				return err
 			}
 
-			recipientOtherChain := args[1] // same as OtherExecutor.DeputyAddress
+			recipientOtherChain := args[1] // same as the other executor's deputy address
 			senderOtherChain := args[2]
 
 			// Timestamp defaults to time.Now() unless it's explicitly set
@@ -77,10 +81,10 @@ func GetCmdCreateAtomicSwap(cdc *codec.Codec) *cobra.Command {
 				return err
 			}
 
-			randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+			randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 			// Print random number, timestamp, and hash to user's console
-			fmt.Printf("\nRandom number: %s\n", hex.EncodeToString(randomNumber.Bytes()))
+			fmt.Printf("\nRandom number: %s\n", string(randomNumber[:]))
 			fmt.Printf("Timestamp: %d\n", timestamp)
 			fmt.Printf("Random number hash: %s\n\n", hex.EncodeToString(randomNumberHash))
 
@@ -89,21 +93,14 @@ func GetCmdCreateAtomicSwap(cdc *codec.Codec) *cobra.Command {
 				return err
 			}
 
-			expectedIncome := args[5]
+			heightSpan, err := strconv.ParseUint(args[5], 10, 64)
-
-			heightSpan, err := strconv.ParseInt(args[6], 10, 64)
-			if err != nil {
-				return err
-			}
-
-			crossChain, err := strconv.ParseBool(args[7])
 			if err != nil {
 				return err
 			}
 
 			msg := types.NewMsgCreateAtomicSwap(
-				from, to, recipientOtherChain, senderOtherChain, randomNumberHash,
+				from, to, recipientOtherChain, senderOtherChain,
-				timestamp, coins, expectedIncome, heightSpan, crossChain,
+				randomNumberHash, timestamp, coins, heightSpan,
 			)
 
 			err = msg.ValidateBasic()
@@ -130,7 +127,7 @@ func GetCmdClaimAtomicSwap(cdc *codec.Codec) *cobra.Command {
 
 			from := cliCtx.GetFromAddress()
 
-			swapID, err := types.HexToBytes(args[0])
+			swapID, err := hex.DecodeString(args[0])
 			if err != nil {
 				return err
 			}
@@ -138,11 +135,7 @@ func GetCmdClaimAtomicSwap(cdc *codec.Codec) *cobra.Command {
 			if len(strings.TrimSpace(args[1])) == 0 {
 				return fmt.Errorf("random-number cannot be empty")
 			}
-
+			randomNumber := []byte(args[1])
-			randomNumber, err := types.HexToBytes(args[1])
-			if err != nil {
-				return err
-			}
 
 			msg := types.NewMsgClaimAtomicSwap(from, swapID, randomNumber)
 
@@ -170,7 +163,7 @@ func GetCmdRefundAtomicSwap(cdc *codec.Codec) *cobra.Command {
 
 			from := cliCtx.GetFromAddress()
 
-			swapID, err := types.HexToBytes(args[0])
+			swapID, err := hex.DecodeString(args[0])
 			if err != nil {
 				return err
 			}

x/bep3/client/rest/query.go

@@ -1,13 +1,15 @@
 package rest
 
 import (
+	"encoding/hex"
 	"fmt"
 	"net/http"
-
+	"strconv"
-	"github.com/gorilla/mux"
 
 	"github.com/cosmos/cosmos-sdk/client/context"
+	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/rest"
+	"github.com/gorilla/mux"
 
 	"github.com/kava-labs/kava/x/bep3/types"
 )
@@ -19,6 +21,7 @@ func registerQueryRoutes(cliCtx context.CLIContext, r *mux.Router) {
 	r.HandleFunc(fmt.Sprintf("/%s/swap/{%s}", types.ModuleName, restSwapID), queryAtomicSwapHandlerFn(cliCtx)).Methods("GET")
 	r.HandleFunc(fmt.Sprintf("/%s/swaps", types.ModuleName), queryAtomicSwapsHandlerFn(cliCtx)).Methods("GET")
 	r.HandleFunc(fmt.Sprintf("/%s/supply/{%s}", types.ModuleName, restDenom), queryAssetSupplyHandlerFn(cliCtx)).Methods("GET")
+	r.HandleFunc(fmt.Sprintf("/%s/supplies", types.ModuleName), queryAssetSuppliesHandlerFn(cliCtx)).Methods("GET")
 	r.HandleFunc(fmt.Sprintf("/%s/parameters", types.ModuleName), queryParamsHandlerFn(cliCtx)).Methods("GET")
 
 }
@@ -38,7 +41,7 @@ func queryAtomicSwapHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
 			return
 		}
-		swapID, err := types.HexToBytes(vars[restSwapID])
+		swapID, err := hex.DecodeString(vars[restSwapID])
 		if err != nil {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
 			return
@@ -69,38 +72,75 @@ func queryAtomicSwapHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 	}
 }
 
+// HTTP request handler to query list of atomic swaps filtered by optional params
 func queryAtomicSwapsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
-		// Parse the query height
+		_, page, limit, err := rest.ParseHTTPArgsWithLimit(r, 0)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
+
 		cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
 		if !ok {
 			return
 		}
 
-		route := fmt.Sprintf("custom/%s/%s", types.ModuleName, types.QueryGetAtomicSwaps)
+		var (
+			involveAddr   sdk.AccAddress
+			expiration    uint64
+			swapStatus    types.SwapStatus
+			swapDirection types.SwapDirection
+		)
 
-		res, height, err := cliCtx.QueryWithData(route, nil)
+		if x := r.URL.Query().Get(RestInvolve); len(x) != 0 {
+			involveAddr, err = sdk.AccAddressFromBech32(x)
+			if err != nil {
+				rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+				return
+			}
+		}
+
+		if x := r.URL.Query().Get(RestExpiration); len(x) != 0 {
+			expiration, err = strconv.ParseUint(x, 10, 64)
+			if err != nil {
+				rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+				return
+			}
+		}
+
+		if x := r.URL.Query().Get(RestStatus); len(x) != 0 {
+			swapStatus = types.NewSwapStatusFromString(x)
+			if !swapStatus.IsValid() {
+				rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("invalid swap status %s", swapStatus))
+				return
+			}
+		}
+
+		if x := r.URL.Query().Get(RestDirection); len(x) != 0 {
+			swapDirection = types.NewSwapDirectionFromString(x)
+			if !swapDirection.IsValid() {
+				rest.WriteErrorResponse(w, http.StatusBadRequest, fmt.Sprintf("invalid swap direction %s", swapDirection))
+				return
+			}
+		}
+
+		params := types.NewQueryAtomicSwaps(page, limit, involveAddr, expiration, swapStatus, swapDirection)
+		bz, err := cliCtx.Codec.MarshalJSON(params)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
+
+		route := fmt.Sprintf("custom/%s/%s", types.QuerierRoute, types.QueryGetAtomicSwaps)
+		res, height, err := cliCtx.QueryWithData(route, bz)
 		if err != nil {
 			rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
 			return
 		}
 
-		// Decode and return results
 		cliCtx = cliCtx.WithHeight(height)
-
+		rest.PostProcessResponse(w, cliCtx, res)
-		var swaps types.AtomicSwaps
-		err = cliCtx.Codec.UnmarshalJSON(res, &swaps)
-		if err != nil {
-			rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
-			return
-		}
-
-		// using empty slice so json returns [] instead of null when there's no swaps
-		sliceSwaps := types.AtomicSwaps{}
-		for _, s := range swaps {
-			sliceSwaps = append(sliceSwaps, s)
-		}
-		rest.PostProcessResponse(w, cliCtx, cliCtx.Codec.MustMarshalJSON(sliceSwaps))
 	}
 }
 
@@ -143,6 +183,41 @@ func queryAssetSupplyHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 	}
 }
 
+func queryAssetSuppliesHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		// Parse the query height
+		cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)
+		if !ok {
+			return
+		}
+
+		route := fmt.Sprintf("custom/%s/%s", types.ModuleName, types.QueryGetAssetSupplies)
+
+		res, height, err := cliCtx.QueryWithData(route, nil)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusInternalServerError, err.Error())
+			return
+		}
+
+		// Decode and return results
+		cliCtx = cliCtx.WithHeight(height)
+
+		var supplies types.AssetSupplies
+		err = cliCtx.Codec.UnmarshalJSON(res, &supplies)
+		if err != nil {
+			rest.WriteErrorResponse(w, http.StatusNotFound, err.Error())
+			return
+		}
+
+		// using empty slice so json returns [] instead of null when there's no swaps
+		sliceSupplies := types.AssetSupplies{}
+		for _, s := range supplies {
+			sliceSupplies = append(sliceSupplies, s)
+		}
+		rest.PostProcessResponse(w, cliCtx, cliCtx.Codec.MustMarshalJSON(sliceSupplies))
+	}
+}
+
 func queryParamsHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		cliCtx, ok := rest.ParseQueryHeightOrReturnBadRequest(w, cliCtx, r)

x/bep3/client/rest/rest.go

@@ -10,6 +10,15 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/rest"
 )
 
+// REST Variable names
+// nolint
+const (
+	RestExpiration = "expiration"
+	RestInvolve    = "involve"
+	RestStatus     = "status"
+	RestDirection  = "direction"
+)
+
 // RegisterRoutes registers bep3-related REST handlers to a router
 func RegisterRoutes(cliCtx context.CLIContext, r *mux.Router) {
 	registerQueryRoutes(cliCtx, r)
@@ -26,8 +35,7 @@ type PostCreateSwapReq struct {
 	RandomNumberHash    tmbytes.HexBytes `json:"random_number_hash" yaml:"random_number_hash"`
 	Timestamp           int64            `json:"timestamp" yaml:"timestamp"`
 	Amount              sdk.Coins        `json:"amount" yaml:"amount"`
-	ExpectedIncome      string           `json:"expected_income" yaml:"expected_income"`
+	HeightSpan          uint64           `json:"height_span" yaml:"height_span"`
-	HeightSpan          int64            `json:"height_span" yaml:"height_span"`
 	CrossChain          bool             `json:"cross_chain" yaml:"cross_chain"`
 }
 

x/bep3/client/rest/tx.go

@@ -41,9 +41,7 @@ func postCreateHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 			req.RandomNumberHash,
 			req.Timestamp,
 			req.Amount,
-			req.ExpectedIncome,
 			req.HeightSpan,
-			req.CrossChain,
 		)
 		if err := msg.ValidateBasic(); err != nil {
 			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())

x/bep3/genesis.go

@@ -37,8 +37,8 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, supplyKeeper types.SupplyKeeper
 		if !found {
 			panic(fmt.Sprintf("invalid asset supply: %s is not a supported asset", coin.Denom))
 		}
-		if !coin.Limit.Equal(supply.Limit.Amount) {
+		if !coin.Limit.Equal(supply.SupplyLimit.Amount) {
-			panic(fmt.Sprintf("supported asset limit %s does not equal asset supply %s", coin.Limit, supply.Limit.Amount))
+			panic(fmt.Sprintf("supported asset limit %s does not equal asset supply %s", coin.Limit, supply.SupplyLimit.Amount))
 		}
 
 		// Increment current, incoming, and outgoing asset supplies

x/bep3/genesis_test.go

@@ -89,7 +89,7 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 						IncomingSupply: c("bnb", 0),
 						OutgoingSupply: c("bnb", 0),
 						CurrentSupply:  c("bnb", assetParam.Limit.Add(i(1)).Int64()),
-						Limit:          c("bnb", assetParam.Limit.Int64()),
+						SupplyLimit:    c("bnb", assetParam.Limit.Int64()),
 					},
 				}
 				return app.GenesisState{"bep3": bep3.ModuleCdc.MustMarshalJSON(gs)}
@@ -108,9 +108,9 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 				_, addrs := app.GeneratePrivKeyAddressPairs(2)
 				timestamp := ts(0)
 				randomNumber, _ := bep3.GenerateSecureRandomNumber()
-				randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+				randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 				swap := bep3.NewAtomicSwap(cs(c("bnb", overLimitAmount.Int64())), randomNumberHash,
-					int64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
+					uint64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
 					TestRecipientOtherChain, 0, bep3.Open, true, bep3.Incoming)
 				gs.AtomicSwaps = bep3.AtomicSwaps{swap}
 
@@ -121,7 +121,7 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 						IncomingSupply: c("bnb", assetParam.Limit.Add(i(1)).Int64()),
 						OutgoingSupply: c("bnb", 0),
 						CurrentSupply:  c("bnb", 0),
-						Limit:          c("bnb", assetParam.Limit.Int64()),
+						SupplyLimit:    c("bnb", assetParam.Limit.Int64()),
 					},
 				}
 				return app.GenesisState{"bep3": bep3.ModuleCdc.MustMarshalJSON(gs)}
@@ -141,9 +141,9 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 				_, addrs := app.GeneratePrivKeyAddressPairs(2)
 				timestamp := ts(0)
 				randomNumber, _ := bep3.GenerateSecureRandomNumber()
-				randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+				randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 				swap := bep3.NewAtomicSwap(cs(c("bnb", halfLimit)), randomNumberHash,
-					int64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
+					uint64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
 					TestRecipientOtherChain, 0, bep3.Open, true, bep3.Incoming)
 				gs.AtomicSwaps = bep3.AtomicSwaps{swap}
 
@@ -154,7 +154,7 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 						IncomingSupply: c("bnb", halfLimit),
 						OutgoingSupply: c("bnb", 0),
 						CurrentSupply:  c("bnb", overHalfLimit),
-						Limit:          c("bnb", assetParam.Limit.Int64()),
+						SupplyLimit:    c("bnb", assetParam.Limit.Int64()),
 					},
 				}
 				return app.GenesisState{"bep3": bep3.ModuleCdc.MustMarshalJSON(gs)}
@@ -171,7 +171,7 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 						IncomingSupply: c("fake", 0),
 						OutgoingSupply: c("fake", 0),
 						CurrentSupply:  c("fake", 0),
-						Limit:          c("fake", StandardSupplyLimit.Int64()),
+						SupplyLimit:    c("fake", StandardSupplyLimit.Int64()),
 					},
 				}
 				return app.GenesisState{"bep3": bep3.ModuleCdc.MustMarshalJSON(gs)}
@@ -185,9 +185,9 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 				_, addrs := app.GeneratePrivKeyAddressPairs(2)
 				timestamp := ts(0)
 				randomNumber, _ := bep3.GenerateSecureRandomNumber()
-				randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+				randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 				swap := bep3.NewAtomicSwap(cs(c("fake", 500000)), randomNumberHash,
-					int64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
+					uint64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
 					TestRecipientOtherChain, 0, bep3.Open, true, bep3.Incoming)
 
 				gs.AtomicSwaps = bep3.AtomicSwaps{swap}
@@ -202,9 +202,9 @@ func (suite *GenesisTestSuite) TestGenesisState() {
 				_, addrs := app.GeneratePrivKeyAddressPairs(2)
 				timestamp := ts(0)
 				randomNumber, _ := bep3.GenerateSecureRandomNumber()
-				randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+				randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 				swap := bep3.NewAtomicSwap(cs(c("bnb", 5000)), randomNumberHash,
-					int64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
+					uint64(360), timestamp, suite.addrs[0], addrs[1], TestSenderOtherChain,
 					TestRecipientOtherChain, 0, bep3.NULL, true, bep3.Incoming)
 
 				gs.AtomicSwaps = bep3.AtomicSwaps{swap}

x/bep3/handler.go

@@ -25,7 +25,7 @@ func NewHandler(k Keeper) sdk.Handler {
 // handleMsgCreateAtomicSwap handles requests to create a new AtomicSwap
 func handleMsgCreateAtomicSwap(ctx sdk.Context, k Keeper, msg MsgCreateAtomicSwap) (*sdk.Result, error) {
 	err := k.CreateAtomicSwap(ctx, msg.RandomNumberHash, msg.Timestamp, msg.HeightSpan, msg.From, msg.To,
-		msg.SenderOtherChain, msg.RecipientOtherChain, msg.Amount, msg.ExpectedIncome, msg.CrossChain)
+		msg.SenderOtherChain, msg.RecipientOtherChain, msg.Amount, true)
 
 	if err != nil {
 		return nil, err

x/bep3/handler_test.go

@@ -47,31 +47,32 @@ func (suite *HandlerTestSuite) SetupTest() {
 }
 
 func (suite *HandlerTestSuite) AddAtomicSwap() (tmbytes.HexBytes, tmbytes.HexBytes) {
-	expireHeight := int64(360)
+	expireHeight := uint64(360)
 	amount := cs(c("bnb", int64(50000)))
 	timestamp := ts(0)
 	randomNumber, _ := bep3.GenerateSecureRandomNumber()
-	randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+	randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 
 	// Create atomic swap and check err to confirm creation
 	err := suite.keeper.CreateAtomicSwap(suite.ctx, randomNumberHash, timestamp, expireHeight,
 		suite.addrs[0], suite.addrs[1], TestSenderOtherChain, TestRecipientOtherChain,
-		amount, amount.String(), true)
+		amount, true)
 	suite.Nil(err)
 
 	swapID := bep3.CalculateSwapID(randomNumberHash, suite.addrs[0], TestSenderOtherChain)
-	return swapID, randomNumber.Bytes()
+	return swapID, randomNumber[:]
 }
 
 func (suite *HandlerTestSuite) TestMsgCreateAtomicSwap() {
 	amount := cs(c("bnb", int64(10000)))
 	timestamp := ts(0)
 	randomNumber, _ := bep3.GenerateSecureRandomNumber()
-	randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+	randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 
 	msg := bep3.NewMsgCreateAtomicSwap(
-		suite.addrs[0], suite.addrs[2], TestRecipientOtherChain, TestSenderOtherChain,
+		suite.addrs[0], suite.addrs[2], TestRecipientOtherChain,
-		randomNumberHash, timestamp, amount, amount.String(), int64(300), true)
+		TestSenderOtherChain, randomNumberHash, timestamp, amount,
+		uint64(300))
 
 	res, err := suite.handler(suite.ctx, msg)
 	suite.Require().NoError(err)
@@ -81,9 +82,9 @@ func (suite *HandlerTestSuite) TestMsgCreateAtomicSwap() {
 func (suite *HandlerTestSuite) TestMsgClaimAtomicSwap() {
 	// Attempt claim msg on fake atomic swap
 	badRandomNumber, _ := bep3.GenerateSecureRandomNumber()
-	badRandomNumberHash := bep3.CalculateRandomHash(badRandomNumber.Bytes(), ts(0))
+	badRandomNumberHash := bep3.CalculateRandomHash(badRandomNumber[:], ts(0))
 	badSwapID := bep3.CalculateSwapID(badRandomNumberHash, suite.addrs[0], TestSenderOtherChain)
-	badMsg := bep3.NewMsgClaimAtomicSwap(suite.addrs[0], badSwapID, badRandomNumber.Bytes())
+	badMsg := bep3.NewMsgClaimAtomicSwap(suite.addrs[0], badSwapID, badRandomNumber[:])
 	badRes, err := suite.handler(suite.ctx, badMsg)
 	suite.Require().Error(err)
 	suite.Require().Nil(badRes)
@@ -99,7 +100,7 @@ func (suite *HandlerTestSuite) TestMsgClaimAtomicSwap() {
 func (suite *HandlerTestSuite) TestMsgRefundAtomicSwap() {
 	// Attempt refund msg on fake atomic swap
 	badRandomNumber, _ := bep3.GenerateSecureRandomNumber()
-	badRandomNumberHash := bep3.CalculateRandomHash(badRandomNumber.Bytes(), ts(0))
+	badRandomNumberHash := bep3.CalculateRandomHash(badRandomNumber[:], ts(0))
 	badSwapID := bep3.CalculateSwapID(badRandomNumberHash, suite.addrs[0], TestSenderOtherChain)
 	badMsg := bep3.NewMsgRefundAtomicSwap(suite.addrs[0], badSwapID)
 	badRes, err := suite.handler(suite.ctx, badMsg)

x/bep3/integration_test.go

@@ -73,10 +73,10 @@ func baseGenState(deputy sdk.AccAddress) bep3.GenesisState {
 
 func loadSwapAndSupply(addr sdk.AccAddress, index int) (bep3.AtomicSwap, bep3.AssetSupply) {
 	coin := c(DenomMap[index], 50000)
-	expireOffset := int64((index * 15) + 360) // Default expire height + offet to match timestamp
+	expireOffset := uint64((index * 15) + 360) // Default expire height + offet to match timestamp
 	timestamp := ts(index)                     // One minute apart
 	randomNumber, _ := bep3.GenerateSecureRandomNumber()
-	randomNumberHash := bep3.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+	randomNumberHash := bep3.CalculateRandomHash(randomNumber[:], timestamp)
 	swap := bep3.NewAtomicSwap(cs(coin), randomNumberHash,
 		expireOffset, timestamp, addr, addr, TestSenderOtherChain,
 		TestRecipientOtherChain, 1, bep3.Open, true, bep3.Incoming)

x/bep3/keeper/asset.go

@@ -15,8 +15,8 @@ func (k Keeper) IncrementCurrentAssetSupply(ctx sdk.Context, coin sdk.Coin) erro
 	}
 
 	// Resulting current supply must be under asset's limit
-	if !supply.Limit.IsGTE(supply.CurrentSupply.Add(coin)) {
+	if !supply.SupplyLimit.IsGTE(supply.CurrentSupply.Add(coin)) {
-		return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, supply.CurrentSupply, supply.Limit)
+		return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, supply.CurrentSupply, supply.SupplyLimit)
 	}
 
 	supply.CurrentSupply = supply.CurrentSupply.Add(coin)
@@ -51,8 +51,8 @@ func (k Keeper) IncrementIncomingAssetSupply(ctx sdk.Context, coin sdk.Coin) err
 
 	// 	Result of (current + incoming + amount) must be under asset's limit
 	totalSupply := supply.CurrentSupply.Add(supply.IncomingSupply)
-	if !supply.Limit.IsGTE(totalSupply.Add(coin)) {
+	if !supply.SupplyLimit.IsGTE(totalSupply.Add(coin)) {
-		return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, totalSupply, supply.Limit)
+		return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, totalSupply, supply.SupplyLimit)
 	}
 
 	supply.IncomingSupply = supply.IncomingSupply.Add(coin)

x/bep3/keeper/asset_test.go

@@ -43,7 +43,7 @@ func (suite *AssetTestSuite) SetupTest() {
 		IncomingSupply: c("bnb", 5),
 		OutgoingSupply: c("bnb", 5),
 		CurrentSupply:  c("bnb", 40),
-		Limit:          c("bnb", 50),
+		SupplyLimit:    c("bnb", 50),
 	}
 	keeper.SetAssetSupply(ctx, supply, []byte(supply.Denom))
 

x/bep3/keeper/integration_test.go

@@ -66,13 +66,13 @@ func atomicSwaps(ctx sdk.Context, count int) types.AtomicSwaps {
 }
 
 func atomicSwap(ctx sdk.Context, index int) types.AtomicSwap {
-	expireOffset := int64((index * 15) + 360) // Default expire height + offet to match timestamp
+	expireOffset := uint64((index * 15) + 360) // Default expire height + offet to match timestamp
 	timestamp := ts(index)                     // One minute apart
 	randomNumber, _ := types.GenerateSecureRandomNumber()
-	randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+	randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 	return types.NewAtomicSwap(cs(c("bnb", 50000)), randomNumberHash,
-		ctx.BlockHeight()+expireOffset, timestamp, TestUser1, TestUser2,
+		uint64(ctx.BlockHeight())+expireOffset, timestamp, TestUser1, TestUser2,
 		TestSenderOtherChain, TestRecipientOtherChain, 0, types.Open, true,
 		types.Incoming)
 }

x/bep3/keeper/keeper.go

@@ -124,7 +124,7 @@ func (k Keeper) IterateAtomicSwapsByBlock(ctx sdk.Context, inclusiveCutoffTime u
 	store := prefix.NewStore(ctx.KVStore(k.key), types.AtomicSwapByBlockPrefix)
 	iterator := store.Iterator(
 		nil, // start at the very start of the prefix store
-		sdk.PrefixEndBytes(types.Uint64ToBytes(inclusiveCutoffTime)), // end of range
+		sdk.PrefixEndBytes(sdk.Uint64ToBigEndian(inclusiveCutoffTime)), // end of range
 	)
 
 	defer iterator.Close()
@@ -146,15 +146,15 @@ func (k Keeper) IterateAtomicSwapsByBlock(ctx sdk.Context, inclusiveCutoffTime u
 // Completed swaps are stored for 1 week.
 func (k Keeper) InsertIntoLongtermStorage(ctx sdk.Context, atomicSwap types.AtomicSwap) {
 	store := prefix.NewStore(ctx.KVStore(k.key), types.AtomicSwapLongtermStoragePrefix)
-	store.Set(types.GetAtomicSwapByHeightKey(atomicSwap.ClosedBlock+types.DefaultLongtermStorageDuration,
+	deletionHeight := uint64(atomicSwap.ClosedBlock) + types.DefaultLongtermStorageDuration
-		atomicSwap.GetSwapID()), atomicSwap.GetSwapID())
+	store.Set(types.GetAtomicSwapByHeightKey(deletionHeight, atomicSwap.GetSwapID()), atomicSwap.GetSwapID())
 }
 
 // RemoveFromLongtermStorage removes a swap from the into the longterm storage index
 func (k Keeper) RemoveFromLongtermStorage(ctx sdk.Context, atomicSwap types.AtomicSwap) {
 	store := prefix.NewStore(ctx.KVStore(k.key), types.AtomicSwapLongtermStoragePrefix)
-	store.Delete(types.GetAtomicSwapByHeightKey(atomicSwap.ClosedBlock+types.DefaultLongtermStorageDuration,
+	deletionHeight := uint64(atomicSwap.ClosedBlock) + types.DefaultLongtermStorageDuration
-		atomicSwap.GetSwapID()))
+	store.Delete(types.GetAtomicSwapByHeightKey(deletionHeight, atomicSwap.GetSwapID()))
 }
 
 // IterateAtomicSwapsLongtermStorage provides an iterator over AtomicSwaps ordered by deletion height.
@@ -164,7 +164,7 @@ func (k Keeper) IterateAtomicSwapsLongtermStorage(ctx sdk.Context, inclusiveCuto
 	store := prefix.NewStore(ctx.KVStore(k.key), types.AtomicSwapLongtermStoragePrefix)
 	iterator := store.Iterator(
 		nil, // start at the very start of the prefix store
-		sdk.PrefixEndBytes(types.Uint64ToBytes(inclusiveCutoffTime)), // end of range
+		sdk.PrefixEndBytes(sdk.Uint64ToBigEndian(inclusiveCutoffTime)), // end of range
 	)
 
 	defer iterator.Close()

x/bep3/keeper/keeper_test.go

@@ -122,7 +122,7 @@ func (suite *KeeperTestSuite) TestInsertIntoByBlockIndex() {
 
 	// Block index lacks getter methods, must use iteration to get count of swaps in store
 	var swapIDs [][]byte
-	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, uint64(atomicSwap.ExpireHeight+1), func(id []byte) bool {
+	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, atomicSwap.ExpireHeight+1, func(id []byte) bool {
 		swapIDs = append(swapIDs, id)
 		return false
 	})
@@ -145,7 +145,7 @@ func (suite *KeeperTestSuite) TestRemoveFromByBlockIndex() {
 
 	// Check stored data in block index
 	var swapIDsPre [][]byte
-	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, uint64(atomicSwap.ExpireHeight+1), func(id []byte) bool {
+	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, atomicSwap.ExpireHeight+1, func(id []byte) bool {
 		swapIDsPre = append(swapIDsPre, id)
 		return false
 	})
@@ -155,7 +155,7 @@ func (suite *KeeperTestSuite) TestRemoveFromByBlockIndex() {
 
 	// Check stored data not in block index
 	var swapIDsPost [][]byte
-	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, uint64(atomicSwap.ExpireHeight+1), func(id []byte) bool {
+	suite.keeper.IterateAtomicSwapsByBlock(suite.ctx, atomicSwap.ExpireHeight+1, func(id []byte) bool {
 		swapIDsPost = append(swapIDsPost, id)
 		return false
 	})
@@ -178,10 +178,10 @@ func (suite *KeeperTestSuite) TestIterateAtomicSwapsByBlock() {
 		// Initialize a new atomic swap (different randomNumberHash = different swap IDs)
 		timestamp := tmtime.Now().Add(time.Duration(i) * time.Minute).Unix()
 		randomNumber, _ := types.GenerateSecureRandomNumber()
-		randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 		atomicSwap := types.NewAtomicSwap(cs(c("bnb", 50000)), randomNumberHash,
-			blockCtx.BlockHeight(), timestamp, TestUser1, TestUser2,
+			uint64(blockCtx.BlockHeight()), timestamp, TestUser1, TestUser2,
 			TestSenderOtherChain, TestRecipientOtherChain, 0, types.Open,
 			true, types.Incoming)
 
@@ -269,10 +269,10 @@ func (suite *KeeperTestSuite) TestIterateAtomicSwapsLongtermStorage() {
 	for i := 0; i < 8; i++ {
 		timestamp := tmtime.Now().Unix()
 		randomNumber, _ := types.GenerateSecureRandomNumber()
-		randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 		atomicSwap := types.NewAtomicSwap(cs(c("bnb", 50000)), randomNumberHash,
-			suite.ctx.BlockHeight(), timestamp, TestUser1, TestUser2,
+			uint64(suite.ctx.BlockHeight()), timestamp, TestUser1, TestUser2,
 			TestSenderOtherChain, TestRecipientOtherChain, 100, types.Open,
 			true, types.Incoming)
 

x/bep3/keeper/params.go

@@ -25,13 +25,13 @@ func (k Keeper) GetBnbDeputyAddress(ctx sdk.Context) sdk.AccAddress {
 }
 
 // GetMaxBlockLock returns the maximum block lock
-func (k Keeper) GetMaxBlockLock(ctx sdk.Context) int64 {
+func (k Keeper) GetMaxBlockLock(ctx sdk.Context) uint64 {
 	params := k.GetParams(ctx)
 	return params.MaxBlockLock
 }
 
 // GetMinBlockLock returns the minimum block lock
-func (k Keeper) GetMinBlockLock(ctx sdk.Context) int64 {
+func (k Keeper) GetMinBlockLock(ctx sdk.Context) uint64 {
 	params := k.GetParams(ctx)
 	return params.MinBlockLock
 }

x/bep3/keeper/querier.go

@@ -3,6 +3,7 @@ package keeper
 import (
 	abci "github.com/tendermint/tendermint/abci/types"
 
+	"github.com/cosmos/cosmos-sdk/client"
 	"github.com/cosmos/cosmos-sdk/codec"
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
@@ -16,6 +17,8 @@ func NewQuerier(keeper Keeper) sdk.Querier {
 		switch path[0] {
 		case types.QueryGetAssetSupply:
 			return queryAssetSupply(ctx, req, keeper)
+		case types.QueryGetAssetSupplies:
+			return queryAssetSupplies(ctx, req, keeper)
 		case types.QueryGetAtomicSwap:
 			return queryAtomicSwap(ctx, req, keeper)
 		case types.QueryGetAtomicSwaps:
@@ -50,6 +53,20 @@ func queryAssetSupply(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]
 	return bz, nil
 }
 
+func queryAssetSupplies(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) (res []byte, err error) {
+	assets := keeper.GetAllAssetSupplies(ctx)
+	if assets == nil {
+		assets = types.AssetSupplies{}
+	}
+
+	bz, err := codec.MarshalJSONIndent(types.ModuleCdc, assets)
+	if err != nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
+	}
+
+	return bz, nil
+}
+
 func queryAtomicSwap(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
 	// Decode request
 	var requestParams types.QueryAtomicSwapByID
@@ -73,16 +90,21 @@ func queryAtomicSwap(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]b
 	return bz, nil
 }
 
-func queryAtomicSwaps(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) (res []byte, err error) {
+func queryAtomicSwaps(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]byte, error) {
-	var swaps types.AtomicSwaps
+	var params types.QueryAtomicSwaps
+	err := types.ModuleCdc.UnmarshalJSON(req.Data, &params)
+	if err != nil {
+		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
+	}
 
-	keeper.IterateAtomicSwaps(ctx, func(s types.AtomicSwap) bool {
+	unfilteredSwaps := keeper.GetAllAtomicSwaps(ctx)
-		swaps = append(swaps, s)
+	swaps := filterAtomicSwaps(ctx, unfilteredSwaps, params)
-		return false
+	if swaps == nil {
-	})
+		swaps = types.AtomicSwaps{}
+	}
 
-	bz, err2 := codec.MarshalJSONIndent(types.ModuleCdc, swaps)
+	bz, err := codec.MarshalJSONIndent(types.ModuleCdc, swaps)
-	if err2 != nil {
+	if err != nil {
 		return nil, sdkerrors.Wrap(sdkerrors.ErrJSONMarshal, err.Error())
 	}
 
@@ -101,3 +123,46 @@ func queryGetParams(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) ([]by
 	}
 	return bz, nil
 }
+
+// getAtomicSwapsFiltered retrieves atomic swaps filtered by a given set of params.
+// If no filters are provided, all atomic swaps will be returned in paginated form.
+func filterAtomicSwaps(ctx sdk.Context, swaps types.AtomicSwaps, params types.QueryAtomicSwaps) types.AtomicSwaps {
+	filteredSwaps := make(types.AtomicSwaps, 0, len(swaps))
+
+	for _, s := range swaps {
+		matchInvolve, matchExpiration, matchStatus, matchDirection := true, true, true, true
+
+		// match involved address (if supplied)
+		if len(params.Involve) > 0 {
+			matchInvolve = s.Sender.Equals(params.Involve) || s.Recipient.Equals(params.Involve)
+		}
+
+		// match expiration block limit (if supplied)
+		if params.Expiration > 0 {
+			matchExpiration = s.ExpireHeight <= params.Expiration
+		}
+
+		// match status (if supplied/valid)
+		if params.Status.IsValid() {
+			matchStatus = s.Status == params.Status
+		}
+
+		// match direction (if supplied/valid)
+		if params.Direction.IsValid() {
+			matchDirection = s.Direction == params.Direction
+		}
+
+		if matchInvolve && matchExpiration && matchStatus && matchDirection {
+			filteredSwaps = append(filteredSwaps, s)
+		}
+	}
+
+	start, end := client.Paginate(len(filteredSwaps), params.Page, params.Limit, 100)
+	if start < 0 || end < 0 {
+		filteredSwaps = types.AtomicSwaps{}
+	} else {
+		filteredSwaps = filteredSwaps[start:end]
+	}
+
+	return filteredSwaps
+}

x/bep3/keeper/querier_test.go

@@ -62,16 +62,15 @@ func (suite *QuerierTestSuite) SetupTest() {
 	isSwapID := make(map[string]bool)
 	for i := 0; i < 10; i++ {
 		// Set up atomic swap variables
-		expireHeight := int64(360)
+		expireHeight := uint64(360)
 		amount := cs(c("bnb", 100))
 		timestamp := ts(0)
 		randomNumber, _ := types.GenerateSecureRandomNumber()
-		randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 		// Create atomic swap and check err
 		err := suite.keeper.CreateAtomicSwap(suite.ctx, randomNumberHash, timestamp, expireHeight,
-			addrs[0], suite.addrs[i], TestSenderOtherChain, TestRecipientOtherChain, amount,
+			addrs[0], suite.addrs[i], TestSenderOtherChain, TestRecipientOtherChain, amount, true)
-			amount.String(), true)
 		suite.Nil(err)
 
 		// Calculate swap ID and save
@@ -129,12 +128,33 @@ func (suite *QuerierTestSuite) TestQueryAtomicSwap() {
 	suite.True(suite.isSwapID[hex.EncodeToString(swap.GetSwapID())])
 }
 
+func (suite *QuerierTestSuite) TestQueryAssetSupplies() {
+	ctx := suite.ctx.WithIsCheckTx(false)
+	// Set up request query
+	query := abci.RequestQuery{
+		Path: strings.Join([]string{custom, types.QuerierRoute, types.QueryGetAssetSupplies}, "/"),
+		Data: types.ModuleCdc.MustMarshalJSON(types.NewQueryAssetSupplies(1, 100)),
+	}
+
+	bz, err := suite.querier(ctx, []string{types.QueryGetAssetSupplies}, query)
+	suite.Nil(err)
+	suite.NotNil(bz)
+
+	var supplies types.AssetSupplies
+	suite.Nil(types.ModuleCdc.UnmarshalJSON(bz, &supplies))
+
+	// Check that returned value matches asset supplies in state
+	storeSupplies := suite.keeper.GetAllAssetSupplies(ctx)
+	suite.Equal(len(storeSupplies), len(supplies))
+	suite.Equal(supplies, storeSupplies)
+}
+
 func (suite *QuerierTestSuite) TestQueryAtomicSwaps() {
 	ctx := suite.ctx.WithIsCheckTx(false)
 	// Set up request query
 	query := abci.RequestQuery{
 		Path: strings.Join([]string{custom, types.QuerierRoute, types.QueryGetAtomicSwaps}, "/"),
-		Data: types.ModuleCdc.MustMarshalJSON(types.NewQueryAtomicSwaps(1, 100)),
+		Data: types.ModuleCdc.MustMarshalJSON(types.NewQueryAtomicSwaps(1, 100, sdk.AccAddress{}, 0, types.Open, types.Incoming)),
 	}
 
 	bz, err := suite.querier(ctx, []string{types.QueryGetAtomicSwaps}, query)

x/bep3/keeper/swap.go

@@ -12,10 +12,10 @@ import (
 	"github.com/kava-labs/kava/x/bep3/types"
 )
 
-// CreateAtomicSwap creates a new AtomicSwap
+// CreateAtomicSwap creates a new atomic swap.
-func (k Keeper) CreateAtomicSwap(ctx sdk.Context, randomNumberHash []byte, timestamp int64, heightSpan int64,
+func (k Keeper) CreateAtomicSwap(ctx sdk.Context, randomNumberHash []byte, timestamp int64, heightSpan uint64,
 	sender sdk.AccAddress, recipient sdk.AccAddress, senderOtherChain, recipientOtherChain string,
-	amount sdk.Coins, expectedIncome string, crossChain bool) error {
+	amount sdk.Coins, crossChain bool) error {
 	// Confirm that this is not a duplicate swap
 	swapID := types.CalculateSwapID(randomNumberHash, sender, senderOtherChain)
 	_, found := k.GetAtomicSwap(ctx, swapID)
@@ -80,10 +80,11 @@ func (k Keeper) CreateAtomicSwap(ctx sdk.Context, randomNumberHash []byte, times
 	}
 
 	// Store the details of the swap
-	atomicSwap := types.NewAtomicSwap(amount, randomNumberHash, ctx.BlockHeight()+heightSpan,
+	expireHeight := uint64(ctx.BlockHeight()) + heightSpan
-		timestamp, sender, recipient, senderOtherChain, recipientOtherChain, 0, types.Open,
+	atomicSwap := types.NewAtomicSwap(amount, randomNumberHash, expireHeight, timestamp, sender,
-		crossChain, direction)
+		recipient, senderOtherChain, recipientOtherChain, 0, types.Open, crossChain, direction)
 
+	// Insert the atomic swap under both keys
 	k.SetAtomicSwap(ctx, atomicSwap)
 	k.InsertIntoByBlockIndex(ctx, atomicSwap)
 
@@ -98,8 +99,7 @@ func (k Keeper) CreateAtomicSwap(ctx sdk.Context, randomNumberHash []byte, times
 			sdk.NewAttribute(types.AttributeKeyTimestamp, fmt.Sprintf("%d", atomicSwap.Timestamp)),
 			sdk.NewAttribute(types.AttributeKeySenderOtherChain, atomicSwap.SenderOtherChain),
 			sdk.NewAttribute(types.AttributeKeyExpireHeight, fmt.Sprintf("%d", atomicSwap.ExpireHeight)),
-			sdk.NewAttribute(types.AttributeKeyAmount, atomicSwap.Amount[0].String()),
+			sdk.NewAttribute(types.AttributeKeyAmount, atomicSwap.Amount.String()),
-			sdk.NewAttribute(types.AttributeKeyExpectedIncome, expectedIncome),
 			sdk.NewAttribute(types.AttributeKeyDirection, atomicSwap.Direction.String()),
 		),
 	)
@@ -107,7 +107,7 @@ func (k Keeper) CreateAtomicSwap(ctx sdk.Context, randomNumberHash []byte, times
 	return nil
 }
 
-// ClaimAtomicSwap validates a claim attempt, and if successful, sends the escrowed amount and closes the AtomicSwap
+// ClaimAtomicSwap validates a claim attempt, and if successful, sends the escrowed amount and closes the AtomicSwap.
 func (k Keeper) ClaimAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []byte, randomNumber []byte) error {
 	atomicSwap, found := k.GetAtomicSwap(ctx, swapID)
 	if !found {
@@ -116,7 +116,7 @@ func (k Keeper) ClaimAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []b
 
 	// Only open atomic swaps can be claimed
 	if atomicSwap.Status != types.Open {
-		return types.ErrSwapNotClaimable
+		return sdkerrors.Wrapf(types.ErrSwapNotClaimable, "status %s", atomicSwap.Status.String())
 	}
 
 	//  Calculate hashed secret using submitted number
@@ -125,13 +125,13 @@ func (k Keeper) ClaimAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []b
 
 	// Confirm that secret unlocks the atomic swap
 	if !bytes.Equal(hashedSecret, atomicSwap.GetSwapID()) {
-		return sdkerrors.Wrapf(types.ErrInvalidClaimSecret, "%s ≠ %s", hex.EncodeToString(hashedSecret), hex.EncodeToString(atomicSwap.GetSwapID()))
+		return sdkerrors.Wrapf(types.ErrInvalidClaimSecret, "the submitted random number is incorrect")
 	}
 
 	var err error
 	switch atomicSwap.Direction {
 	case types.Incoming:
-		err := k.DecrementIncomingAssetSupply(ctx, atomicSwap.Amount[0])
+		err = k.DecrementIncomingAssetSupply(ctx, atomicSwap.Amount[0])
 		if err != nil {
 			return err
 		}
@@ -175,14 +175,14 @@ func (k Keeper) ClaimAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []b
 			sdk.NewAttribute(types.AttributeKeyRecipient, atomicSwap.Recipient.String()),
 			sdk.NewAttribute(types.AttributeKeyAtomicSwapID, hex.EncodeToString(atomicSwap.GetSwapID())),
 			sdk.NewAttribute(types.AttributeKeyRandomNumberHash, hex.EncodeToString(atomicSwap.RandomNumberHash)),
-			sdk.NewAttribute(types.AttributeKeyRandomNumber, hex.EncodeToString(randomNumber)),
+			sdk.NewAttribute(types.AttributeKeyRandomNumber, string(randomNumber)),
 		),
 	)
 
 	return nil
 }
 
-// RefundAtomicSwap refunds an AtomicSwap, sending assets to the original sender and closing the AtomicSwap
+// RefundAtomicSwap refunds an AtomicSwap, sending assets to the original sender and closing the AtomicSwap.
 func (k Keeper) RefundAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []byte) error {
 	atomicSwap, found := k.GetAtomicSwap(ctx, swapID)
 	if !found {
@@ -190,7 +190,7 @@ func (k Keeper) RefundAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []
 	}
 	// Only expired swaps may be refunded
 	if atomicSwap.Status != types.Expired {
-		return types.ErrSwapNotRefundable
+		return sdkerrors.Wrapf(types.ErrSwapNotRefundable, "status %s", atomicSwap.Status.String())
 	}
 
 	var err error
@@ -225,10 +225,10 @@ func (k Keeper) RefundAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []
 	ctx.EventManager().EmitEvent(
 		sdk.NewEvent(
 			types.EventTypeRefundAtomicSwap,
-			sdk.NewAttribute(types.AttributeKeyRefundSender, fmt.Sprintf("%s", from)),
+			sdk.NewAttribute(types.AttributeKeyRefundSender, from.String()),
-			sdk.NewAttribute(types.AttributeKeySender, fmt.Sprintf("%s", atomicSwap.Sender)),
+			sdk.NewAttribute(types.AttributeKeySender, atomicSwap.Sender.String()),
-			sdk.NewAttribute(types.AttributeKeyAtomicSwapID, fmt.Sprintf("%s", hex.EncodeToString(atomicSwap.GetSwapID()))),
+			sdk.NewAttribute(types.AttributeKeyAtomicSwapID, hex.EncodeToString(atomicSwap.GetSwapID())),
-			sdk.NewAttribute(types.AttributeKeyRandomNumberHash, fmt.Sprintf("%s", hex.EncodeToString(atomicSwap.RandomNumberHash))),
+			sdk.NewAttribute(types.AttributeKeyRandomNumberHash, hex.EncodeToString(atomicSwap.RandomNumberHash)),
 		),
 	)
 
@@ -236,23 +236,23 @@ func (k Keeper) RefundAtomicSwap(ctx sdk.Context, from sdk.AccAddress, swapID []
 }
 
 // UpdateExpiredAtomicSwaps finds all AtomicSwaps that are past (or at) their ending times and expires them.
-func (k Keeper) UpdateExpiredAtomicSwaps(ctx sdk.Context) error {
+func (k Keeper) UpdateExpiredAtomicSwaps(ctx sdk.Context) {
-	var expiredSwaps [][]byte
+	var expiredSwapIDs []string
 	k.IterateAtomicSwapsByBlock(ctx, uint64(ctx.BlockHeight()), func(id []byte) bool {
-		expiredSwaps = append(expiredSwaps, id)
+		atomicSwap, found := k.GetAtomicSwap(ctx, id)
+		if !found {
+			// NOTE: shouldn't happen. Continue to next item.
+			return false
+		}
+		// Expire the uncompleted swap and update both indexes
+		atomicSwap.Status = types.Expired
+		// Note: claimed swaps have already been removed from byBlock index.
+		k.RemoveFromByBlockIndex(ctx, atomicSwap)
+		k.SetAtomicSwap(ctx, atomicSwap)
+		expiredSwapIDs = append(expiredSwapIDs, hex.EncodeToString(atomicSwap.GetSwapID()))
 		return false
 	})
 
-	// Expire incomplete swaps (claimed swaps have already been removed from byBlock index)
-	var expiredSwapIDs []string
-	for _, id := range expiredSwaps {
-		atomicSwap, _ := k.GetAtomicSwap(ctx, id)
-		atomicSwap.Status = types.Expired
-		k.SetAtomicSwap(ctx, atomicSwap)
-		k.RemoveFromByBlockIndex(ctx, atomicSwap)
-		expiredSwapIDs = append(expiredSwapIDs, hex.EncodeToString(atomicSwap.GetSwapID()))
-	}
-
 	// Emit 'swaps_expired' event
 	ctx.EventManager().EmitEvent(
 		sdk.NewEvent(
@@ -261,23 +261,18 @@ func (k Keeper) UpdateExpiredAtomicSwaps(ctx sdk.Context) error {
 			sdk.NewAttribute(types.AttributeExpirationBlock, fmt.Sprintf("%d", ctx.BlockHeight())),
 		),
 	)
-
-	return nil
 }
 
-// DeleteClosedAtomicSwapsFromLongtermStorage removes swaps one week after completion
+// DeleteClosedAtomicSwapsFromLongtermStorage removes swaps one week after completion.
-func (k Keeper) DeleteClosedAtomicSwapsFromLongtermStorage(ctx sdk.Context) error {
+func (k Keeper) DeleteClosedAtomicSwapsFromLongtermStorage(ctx sdk.Context) {
-	var swapsToDelete [][]byte
 	k.IterateAtomicSwapsLongtermStorage(ctx, uint64(ctx.BlockHeight()), func(id []byte) bool {
-		swapsToDelete = append(swapsToDelete, id)
+		swap, found := k.GetAtomicSwap(ctx, id)
+		if !found {
+			// NOTE: shouldn't happen. Continue to next item.
 			return false
-	})
+		}
-
-	// Delete closed atomic swaps
-	for _, id := range swapsToDelete {
-		swap, _ := k.GetAtomicSwap(ctx, id)
 		k.RemoveAtomicSwap(ctx, swap.GetSwapID())
 		k.RemoveFromLongtermStorage(ctx, swap)
-	}
+		return false
-	return nil
+	})
 }

x/bep3/keeper/swap_test.go

@@ -1,7 +1,6 @@
 package keeper_test
 
 import (
-	"fmt"
 	"testing"
 	"time"
 
@@ -74,11 +73,11 @@ func (suite *AtomicSwapTestSuite) GenerateSwapDetails() {
 		// Set up atomic swap details
 		timestamp := ts(i)
 		randomNumber, _ := types.GenerateSecureRandomNumber()
-		randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 		timestamps = append(timestamps, timestamp)
 		randomNumberHashes = append(randomNumberHashes, randomNumberHash)
-		randomNumbers = append(randomNumbers, randomNumber.Bytes())
+		randomNumbers = append(randomNumbers, randomNumber[:])
 	}
 	suite.timestamps = timestamps
 	suite.randomNumberHashes = randomNumberHashes
@@ -90,13 +89,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 	type args struct {
 		randomNumberHash    []byte
 		timestamp           int64
-		heightSpan          int64
+		heightSpan          uint64
 		sender              sdk.AccAddress
 		recipient           sdk.AccAddress
 		senderOtherChain    string
 		recipientOtherChain string
 		coins               sdk.Coins
-		expectedIncome      string
 		crossChain          bool
 		direction           types.SwapDirection
 	}
@@ -113,13 +111,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[0],
 				timestamp:           suite.timestamps[0],
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[1],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -132,13 +129,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[0],
 				timestamp:           suite.timestamps[0],
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.addrs[1],
 				recipient:           suite.addrs[2],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Outgoing,
 			},
@@ -151,13 +147,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[1],
 				timestamp:           suite.timestamps[1],
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[2],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c("xyz", 50000)),
-				expectedIncome:      "50000xyz",
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -170,13 +165,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[2],
 				timestamp:           suite.timestamps[2] - 2000,
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[3],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -189,13 +183,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[3],
 				timestamp:           suite.timestamps[3] + 5000,
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[4],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -208,13 +201,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[4],
 				timestamp:           suite.timestamps[4],
-				heightSpan:          int64(5),
+				heightSpan:          uint64(5),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[5],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -227,13 +219,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[5],
 				timestamp:           suite.timestamps[5],
-				heightSpan:          int64(1000000),
+				heightSpan:          uint64(1000000),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[6],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      fmt.Sprintf("50000%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -246,13 +237,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[6],
 				timestamp:           suite.timestamps[6],
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[7],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 0)),
-				expectedIncome:      fmt.Sprintf("0%s", BNB_DENOM),
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -265,13 +255,12 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			args{
 				randomNumberHash:    suite.randomNumberHashes[0],
 				timestamp:           suite.timestamps[0],
-				heightSpan:          int64(360),
+				heightSpan:          uint64(360),
 				sender:              suite.deputy,
 				recipient:           suite.addrs[1],
 				senderOtherChain:    TestSenderOtherChain,
 				recipientOtherChain: TestRecipientOtherChain,
 				coins:               cs(c(BNB_DENOM, 50000)),
-				expectedIncome:      "50000bnb",
 				crossChain:          true,
 				direction:           types.Incoming,
 			},
@@ -305,7 +294,7 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 			// Create atomic swap
 			err := suite.keeper.CreateAtomicSwap(suite.ctx, tc.args.randomNumberHash, tc.args.timestamp,
 				tc.args.heightSpan, tc.args.sender, tc.args.recipient, tc.args.senderOtherChain,
-				tc.args.recipientOtherChain, tc.args.coins, tc.args.expectedIncome, tc.args.crossChain)
+				tc.args.recipientOtherChain, tc.args.coins, tc.args.crossChain)
 
 			// Load sender's account after swap creation
 			senderAccPost := ak.GetAccount(suite.ctx, tc.args.sender)
@@ -341,7 +330,7 @@ func (suite *AtomicSwapTestSuite) TestCreateAtomicSwap() {
 					types.AtomicSwap{
 						Amount:              tc.args.coins,
 						RandomNumberHash:    tc.args.randomNumberHash,
-						ExpireHeight:        suite.ctx.BlockHeight() + tc.args.heightSpan,
+						ExpireHeight:        uint64(suite.ctx.BlockHeight()) + tc.args.heightSpan,
 						Timestamp:           tc.args.timestamp,
 						Sender:              tc.args.sender,
 						Recipient:           tc.args.recipient,
@@ -419,7 +408,7 @@ func (suite *AtomicSwapTestSuite) TestClaimAtomicSwap() {
 			suite.ctx,
 			args{
 				swapID:       []byte{},
-				randomNumber: invalidRandomNumber.Bytes(),
+				randomNumber: invalidRandomNumber[:],
 				direction:    types.Incoming,
 			},
 			false,
@@ -462,8 +451,8 @@ func (suite *AtomicSwapTestSuite) TestClaimAtomicSwap() {
 
 			// Create atomic swap
 			err := suite.keeper.CreateAtomicSwap(suite.ctx, suite.randomNumberHashes[i], suite.timestamps[i],
-				int64(360), sender, expectedRecipient, TestSenderOtherChain, TestRecipientOtherChain,
+				uint64(360), sender, expectedRecipient, TestSenderOtherChain, TestRecipientOtherChain,
-				expectedClaimAmount, expectedClaimAmount.String(), true)
+				expectedClaimAmount, true)
 			suite.NoError(err)
 
 			realSwapID := types.CalculateSwapID(suite.randomNumberHashes[i], sender, TestSenderOtherChain)
@@ -616,8 +605,8 @@ func (suite *AtomicSwapTestSuite) TestRefundAtomicSwap() {
 			}
 
 			err := suite.keeper.CreateAtomicSwap(suite.ctx, suite.randomNumberHashes[i], suite.timestamps[i],
-				int64(360), sender, suite.addrs[8], TestSenderOtherChain, TestRecipientOtherChain,
+				uint64(360), sender, suite.addrs[8], TestSenderOtherChain, TestRecipientOtherChain,
-				expectedRefundAmount, expectedRefundAmount.String(), true)
+				expectedRefundAmount, true)
 			suite.NoError(err)
 
 			realSwapID := types.CalculateSwapID(suite.randomNumberHashes[i], sender, TestSenderOtherChain)

x/bep3/simulation/decoder_test.go

@@ -27,7 +27,7 @@ func TestDecodeDistributionStore(t *testing.T) {
 
 	oneCoin := sdk.NewCoin("coin", sdk.OneInt())
 	swap := types.NewAtomicSwap(sdk.Coins{oneCoin}, nil, 10, 100, nil, nil, "otherChainSender", "otherChainRec", 200, types.Completed, true, types.Outgoing)
-	supply := types.AssetSupply{Denom: "coin", IncomingSupply: oneCoin, OutgoingSupply: oneCoin, CurrentSupply: oneCoin, Limit: oneCoin}
+	supply := types.AssetSupply{Denom: "coin", IncomingSupply: oneCoin, OutgoingSupply: oneCoin, CurrentSupply: oneCoin, SupplyLimit: oneCoin}
 	bz := tmbytes.HexBytes([]byte{1, 2})
 
 	kvPairs := kv.Pairs{

x/bep3/simulation/genesis.go

@@ -37,17 +37,17 @@ func GenRandBnbDeputy(r *rand.Rand) simulation.Account {
 }
 
 // GenMinBlockLock randomized MinBlockLock
-func GenMinBlockLock(r *rand.Rand) int64 {
+func GenMinBlockLock(r *rand.Rand) uint64 {
 	min := int(types.AbsoluteMinimumBlockLock)
 	max := int(types.AbsoluteMaximumBlockLock)
-	return int64(r.Intn(max-min) + min)
+	return uint64(r.Intn(max-min) + min)
 }
 
 // GenMaxBlockLock randomized MaxBlockLock
-func GenMaxBlockLock(r *rand.Rand, minBlockLock int64) int64 {
+func GenMaxBlockLock(r *rand.Rand, minBlockLock uint64) uint64 {
 	min := int(minBlockLock)
 	max := int(types.AbsoluteMaximumBlockLock)
-	return int64(r.Intn(max-min) + min)
+	return uint64(r.Intn(max-min) + min)
 }
 
 // GenSupportedAssets gets randomized SupportedAssets
@@ -101,7 +101,7 @@ func loadRandomBep3GenState(simState *module.SimulationState) types.GenesisState
 	bnbDeputy := GenRandBnbDeputy(simState.Rand)
 
 	// min/max block lock are hardcoded to 50/100 for expected -NumBlocks=100
-	minBlockLock := int64(types.AbsoluteMinimumBlockLock)
+	minBlockLock := types.AbsoluteMinimumBlockLock
 	maxBlockLock := minBlockLock * 2
 
 	var supportedAssets types.AssetParams

x/bep3/simulation/operations.go

@@ -133,15 +133,13 @@ func SimulateMsgCreateAtomicSwap(ak types.AccountKeeper, k keeper.Keeper) simula
 			return simulation.NewOperationMsgBasic(types.ModuleName, fmt.Sprintf("no-operation (all funds exhausted for asset %s)", denom), "", false, nil), nil, nil
 		}
 		coins := sdk.NewCoins(sdk.NewCoin(denom, amount))
-		expectedIncome := coins.String()
 
 		// We're assuming that sims are run with -NumBlocks=100
-		heightSpan := int64(55)
+		heightSpan := uint64(55)
-		crossChain := true
 
 		msg := types.NewMsgCreateAtomicSwap(
 			sender.Address, recipient.Address, recipientOtherChain, senderOtherChain,
-			randomNumberHash, timestamp, coins, expectedIncome, heightSpan, crossChain,
+			randomNumberHash, timestamp, coins, heightSpan,
 		)
 
 		tx := helpers.GenTx(
@@ -164,14 +162,14 @@ func SimulateMsgCreateAtomicSwap(ak types.AccountKeeper, k keeper.Keeper) simula
 		swapID := types.CalculateSwapID(msg.RandomNumberHash, msg.From, msg.SenderOtherChain)
 		if r.Intn(100) < 50 {
 			// Claim future operation
-			executionBlock := ctx.BlockHeight() + (msg.HeightSpan / 2)
+			executionBlock := uint64(ctx.BlockHeight()) + msg.HeightSpan/2
 			futureOp = simulation.FutureOperation{
 				BlockHeight: int(executionBlock),
 				Op:          operationClaimAtomicSwap(ak, k, swapID, randomNumber.BigInt().Bytes()),
 			}
 		} else {
 			// Refund future operation
-			executionBlock := ctx.BlockHeight() + msg.HeightSpan
+			executionBlock := uint64(ctx.BlockHeight()) + msg.HeightSpan
 			futureOp = simulation.FutureOperation{
 				BlockHeight: int(executionBlock),
 				Op:          operationRefundAtomicSwap(ak, k, swapID),

x/bep3/spec/02_state.md

@@ -48,7 +48,6 @@ type AtomicSwap struct {
 	RecipientOtherChain string           `json:"recipient_other_chain"  yaml:"recipient_other_chain"`
 	ClosedBlock         int64            `json:"closed_block"  yaml:"closed_block"`
 	Status              SwapStatus       `json:"status"  yaml:"status"`
-	CrossChain          bool             `json:"cross_chain"  yaml:"cross_chain"`
 	Direction           SwapDirection    `json:"direction"  yaml:"direction"`
 }
 

x/bep3/spec/03_messages.md

@@ -14,9 +14,7 @@ type MsgCreateAtomicSwap struct {
 	RandomNumberHash    tmbytes.HexBytes `json:"random_number_hash"  yaml:"random_number_hash"`
 	Timestamp           int64            `json:"timestamp"  yaml:"timestamp"`
 	Amount              sdk.Coins        `json:"amount"  yaml:"amount"`
-	ExpectedIncome      string           `json:"expected_income"  yaml:"expected_income"`
 	HeightSpan          int64            `json:"height_span"  yaml:"height_span"`
-	CrossChain          bool             `json:"cross_chain"  yaml:"cross_chain"`
 }
 ```
 

x/bep3/spec/04_events.md

@@ -16,7 +16,6 @@ The `x/bep3` module emits the following events:
 | create_atomic_swap | sender_other_chain | {sender other chain}     |
 | create_atomic_swap | expire_height      | {swap expiration block}  |
 | create_atomic_swap | amount             | {coin amount}            |
-| create_atomic_swap | expected_income    | {expected value received}|
 | create_atomic_swap | direction          | {incoming or outgoing}   |
 | message            | module             | bep3                     |
 | message            | sender             | {sender address}         |

x/bep3/spec/06_begin_block.md

@@ -1,19 +1,46 @@
 # Begin Block
 
-At the start of each block, atomic swaps that have reached `ExpireHeight` are expired. The logic to expire atomic swaps is as follows:
+At the start of each block, atomic swaps that meet certain criteria are expired or deleted.
 
 ```go
-	var expiredSwaps [][]byte
+func BeginBlocker(ctx sdk.Context, k Keeper) {
+	k.UpdateExpiredAtomicSwaps(ctx)
+	k.DeleteClosedAtomicSwapsFromLongtermStorage(ctx)
+}
+```
+
+## Expiration
+
+If an atomic swap's `ExpireHeight` is greater than the current block height, it will be expired. The logic to expire atomic swaps is as follows:
+
+```go
+	var expiredSwapIDs []string
 	k.IterateAtomicSwapsByBlock(ctx, uint64(ctx.BlockHeight()), func(id []byte) bool {
-		expiredSwaps = append(expiredSwaps, id)
+		atomicSwap, found := k.GetAtomicSwap(ctx, id)
+		if !found {
+			return false
+		}
+		// Expire the uncompleted swap and update both indexes
+		atomicSwap.Status = types.Expired
+		k.RemoveFromByBlockIndex(ctx, atomicSwap)
+		k.SetAtomicSwap(ctx, atomicSwap)
+		expiredSwapIDs = append(expiredSwapIDs, hex.EncodeToString(atomicSwap.GetSwapID()))
 		return false
 	})
-
+```
-	// Expire incomplete swaps (claimed swaps have already been removed from byBlock index)
+
-	for _, id := range expiredSwaps {
+## Deletion
-		atomicSwap, _ := k.GetAtomicSwap(ctx, id)
+
-		atomicSwap.Status = types.Expired
+Atomic swaps are deleted 86400 blocks (one week, assuming a block time of 7 seconds) after being completed. The logic to delete atomic swaps is as follows:
-		k.SetAtomicSwap(ctx, atomicSwap)
+
-		k.RemoveFromByBlockIndex(ctx, atomicSwap)
+```go
-	}
+k.IterateAtomicSwapsLongtermStorage(ctx, uint64(ctx.BlockHeight()), func(id []byte) bool {
+	swap, found := k.GetAtomicSwap(ctx, id)
+	if !found {
+		return false
+	}
+	k.RemoveAtomicSwap(ctx, swap.GetSwapID())
+	k.RemoveFromLongtermStorage(ctx, swap)
+	return false
+})
 ```

x/bep3/types/asset.go

@@ -13,17 +13,17 @@ type AssetSupply struct {
 	IncomingSupply sdk.Coin `json:"incoming_supply"  yaml:"incoming_supply"`
 	OutgoingSupply sdk.Coin `json:"outgoing_supply"  yaml:"outgoing_supply"`
 	CurrentSupply  sdk.Coin `json:"current_supply"  yaml:"current_supply"`
-	Limit          sdk.Coin `json:"limit"  yaml:"limit"`
+	SupplyLimit    sdk.Coin `json:"supply_limit"  yaml:"supply_limit"`
 }
 
 // NewAssetSupply initializes a new AssetSupply
-func NewAssetSupply(denom string, incomingSupply, outgoingSupply, currentSupply, limit sdk.Coin) AssetSupply {
+func NewAssetSupply(denom string, incomingSupply, outgoingSupply, currentSupply, supplyLimit sdk.Coin) AssetSupply {
 	return AssetSupply{
 		Denom:          denom,
 		IncomingSupply: incomingSupply,
 		OutgoingSupply: outgoingSupply,
 		CurrentSupply:  currentSupply,
-		Limit:          limit,
+		SupplyLimit:    supplyLimit,
 	}
 }
 
@@ -38,31 +38,23 @@ func (a AssetSupply) Validate() error {
 	if !a.CurrentSupply.IsValid() {
 		return sdkerrors.Wrapf(sdkerrors.ErrInvalidCoins, "current supply %s", a.CurrentSupply)
 	}
-	if !a.Limit.IsValid() {
+	if !a.SupplyLimit.IsValid() {
-		return sdkerrors.Wrapf(sdkerrors.ErrInvalidCoins, "limit %s", a.Limit)
+		return sdkerrors.Wrapf(sdkerrors.ErrInvalidCoins, "supply limit %s", a.SupplyLimit)
 	}
 	return sdk.ValidateDenom(a.Denom)
 }
 
 // String implements stringer
 func (a AssetSupply) String() string {
-	return fmt.Sprintf("Asset Supply"+
+	return fmt.Sprintf(`
-		"\n    Denom:              %s"+
+	%s supply:
-		"\n    Incoming supply:    %s"+
+		Incoming supply:    %s
-		"\n    Outgoing supply:    %s"+
+		Outgoing supply:    %s
-		"\n    Current supply:     %s"+
+		Current supply:     %s
-		"\n    Limit:       %s"+
+		Supply limit:       %s
-		a.Denom, a.IncomingSupply, a.OutgoingSupply, a.CurrentSupply, a.Limit)
+		`,
+		a.Denom, a.IncomingSupply, a.OutgoingSupply, a.CurrentSupply, a.SupplyLimit)
 }
 
 // AssetSupplies is a slice of AssetSupply
 type AssetSupplies []AssetSupply
-
-// String implements stringer
-func (supplies AssetSupplies) String() string {
-	out := ""
-	for _, supply := range supplies {
-		out += supply.String() + "\n"
-	}
-	return out
-}

x/bep3/types/asset_test.go

@@ -43,12 +43,12 @@ func TestAssetSupplyValidate(t *testing.T) {
 			false,
 		},
 		{
-			"invalid limit",
+			"invalid supply limit",
 			AssetSupply{
 				IncomingSupply: coin,
 				OutgoingSupply: coin,
 				CurrentSupply:  coin,
-				Limit:          invalidCoin,
+				SupplyLimit:    invalidCoin,
 			},
 			false,
 		},

x/bep3/types/common_test.go

@@ -25,10 +25,10 @@ func atomicSwaps(count int) types.AtomicSwaps {
 }
 
 func atomicSwap(index int) types.AtomicSwap {
-	expireOffset := int64((index * 15) + 360) // Default expire height + offet to match timestamp
+	expireOffset := uint64((index * 15) + 360) // Default expire height + offet to match timestamp
 	timestamp := ts(index)                     // One minute apart
 	randomNumber, _ := types.GenerateSecureRandomNumber()
-	randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+	randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 
 	swap := types.NewAtomicSwap(cs(c("bnb", 50000)), randomNumberHash, expireOffset, timestamp, kavaAddrs[0],
 		kavaAddrs[1], binanceAddrs[0].String(), binanceAddrs[1].String(), 1, types.Open, true, types.Incoming)

x/bep3/types/events.go

@@ -16,7 +16,6 @@ const (
 	AttributeKeySenderOtherChain = "sender_other_chain"
 	AttributeKeyExpireHeight     = "expire_height"
 	AttributeKeyAmount           = "amount"
-	AttributeKeyExpectedIncome   = "expected_income"
 	AttributeKeyDirection        = "direction"
 	AttributeKeyClaimSender      = "claim_sender"
 	AttributeKeyRandomNumber     = "random_number"

x/bep3/types/hash.go

@@ -4,6 +4,7 @@ import (
 	"crypto/rand"
 	"encoding/binary"
 	"errors"
+	"fmt"
 	"math/big"
 	"strings"
 
@@ -13,22 +14,21 @@ import (
 )
 
 // GenerateSecureRandomNumber generates cryptographically strong pseudo-random number
-func GenerateSecureRandomNumber() (*big.Int, error) {
+func GenerateSecureRandomNumber() ([64]byte, error) {
+	// Max is a 256-bits integer i.e. 2^256
 	max := new(big.Int)
-	max.Exp(big.NewInt(2), big.NewInt(256), nil) // 256-bits integer i.e. 2^256
+	max.Exp(big.NewInt(2), big.NewInt(256), nil)
 
-	// Generate number between 0 - max
+	// Generate number in the range [0, max]
 	randomNumber, err := rand.Int(rand.Reader, max)
 	if err != nil {
-		return big.NewInt(0), errors.New("random number generation error")
+		return [64]byte{}, errors.New("random number generation error")
 	}
 
-	// Catch random numbers that encode to hexadecimal poorly
+	// Ensure length of 64 for hexadecimal encoding by padding with 0s
-	if len(randomNumber.Text(16)) != 64 {
+	var paddedNumber [64]byte
-		return GenerateSecureRandomNumber()
+	copy(paddedNumber[:], fmt.Sprintf("%064x", randomNumber))
-	}
+	return paddedNumber, nil
-
-	return randomNumber, nil
 }
 
 // CalculateRandomHash calculates the hash of a number and timestamp
@@ -43,7 +43,7 @@ func CalculateRandomHash(randomNumber []byte, timestamp int64) []byte {
 func CalculateSwapID(randomNumberHash []byte, sender sdk.AccAddress, senderOtherChain string) []byte {
 	senderOtherChain = strings.ToLower(senderOtherChain)
 	data := randomNumberHash
-	data = append(data, []byte(sender)...)
+	data = append(data, sender.Bytes()...)
 	data = append(data, []byte(senderOtherChain)...)
 	return tmhash.Sum(data)
 }

x/bep3/types/hash_test.go

@@ -36,24 +36,24 @@ func (suite *HashTestSuite) TestGenerateSecureRandomNumber() {
 	secureRandomNumber, err := types.GenerateSecureRandomNumber()
 	suite.Nil(err)
 	suite.NotNil(secureRandomNumber)
-	suite.Equal(64, len(secureRandomNumber.Text(16)))
+	suite.Equal(64, len(secureRandomNumber))
 }
 
 func (suite *HashTestSuite) TestCalculateRandomHash() {
 	randomNumber, _ := types.GenerateSecureRandomNumber()
-	hash := types.CalculateRandomHash(randomNumber.Bytes(), suite.timestamps[0])
+	hash := types.CalculateRandomHash(randomNumber[:], suite.timestamps[0])
 	suite.NotNil(hash)
 	suite.Equal(32, len(hash))
 }
 
 func (suite *HashTestSuite) TestCalculateSwapID() {
 	randomNumber, _ := types.GenerateSecureRandomNumber()
-	hash := types.CalculateRandomHash(randomNumber.Bytes(), suite.timestamps[3])
+	hash := types.CalculateRandomHash(randomNumber[:], suite.timestamps[3])
 	swapID := types.CalculateSwapID(hash, suite.addrs[3], suite.addrs[5].String())
 	suite.NotNil(swapID)
 	suite.Equal(32, len(swapID))
 
-	diffHash := types.CalculateRandomHash(randomNumber.Bytes(), suite.timestamps[2])
+	diffHash := types.CalculateRandomHash(randomNumber[:], suite.timestamps[2])
 	diffSwapID := types.CalculateSwapID(diffHash, suite.addrs[3], suite.addrs[5].String())
 	suite.NotEqual(swapID, diffSwapID)
 }

x/bep3/types/keys.go

@@ -1,8 +1,7 @@
 package types
 
 import (
-	"encoding/binary"
+	sdk "github.com/cosmos/cosmos-sdk/types"
-	"encoding/hex"
 )
 
 const (
@@ -23,7 +22,7 @@ const (
 )
 
 // DefaultLongtermStorageDuration is 1 week (assuming a block time of 7 seconds)
-const DefaultLongtermStorageDuration int64 = 86400
+const DefaultLongtermStorageDuration uint64 = 86400
 
 // Key prefixes
 var (
@@ -34,34 +33,6 @@ var (
 )
 
 // GetAtomicSwapByHeightKey is used by the AtomicSwapByBlock index and AtomicSwapLongtermStorage index
-func GetAtomicSwapByHeightKey(height int64, swapID []byte) []byte {
+func GetAtomicSwapByHeightKey(height uint64, swapID []byte) []byte {
-	return append(Uint64ToBytes(uint64(height)), swapID...)
+	return append(sdk.Uint64ToBigEndian(height), swapID...)
-}
-
-// Uint64ToBytes converts a uint64 into fixed length bytes for use in store keys.
-func Uint64ToBytes(id uint64) []byte {
-	bz := make([]byte, 8)
-	binary.BigEndian.PutUint64(bz, uint64(id))
-	return bz
-}
-
-// Uint64FromBytes converts some fixed length bytes back into a uint64.
-func Uint64FromBytes(bz []byte) uint64 {
-	return binary.BigEndian.Uint64(bz)
-}
-
-// BytesToHex converts data from []byte to a hex-encoded string
-func BytesToHex(data []byte) string {
-	encodedData := make([]byte, hex.EncodedLen(len(data)))
-	hex.Encode(encodedData, data)
-	return string(encodedData)
-}
-
-// HexToBytes converts data from a hex-encoded string to []bytes
-func HexToBytes(data string) ([]byte, error) {
-	decodedData, err := hex.DecodeString(data)
-	if err != nil {
-		return []byte{}, err
-	}
-	return decodedData, nil
 }

x/bep3/types/msg.go

@@ -14,7 +14,6 @@ import (
 
 const (
 	CreateAtomicSwap = "createAtomicSwap"
-	DepositAtomicSwap = "depositAtomicSwap"
 	ClaimAtomicSwap  = "claimAtomicSwap"
 	RefundAtomicSwap = "refundAtomicSwap"
 	CalcSwapID       = "calcSwapID"
@@ -47,15 +46,13 @@ type MsgCreateAtomicSwap struct {
 	RandomNumberHash    tmbytes.HexBytes `json:"random_number_hash"  yaml:"random_number_hash"`
 	Timestamp           int64            `json:"timestamp"  yaml:"timestamp"`
 	Amount              sdk.Coins        `json:"amount"  yaml:"amount"`
-	ExpectedIncome      string           `json:"expected_income"  yaml:"expected_income"`
+	HeightSpan          uint64           `json:"height_span"  yaml:"height_span"`
-	HeightSpan          int64            `json:"height_span"  yaml:"height_span"`
-	CrossChain          bool             `json:"cross_chain"  yaml:"cross_chain"`
 }
 
 // NewMsgCreateAtomicSwap initializes a new MsgCreateAtomicSwap
 func NewMsgCreateAtomicSwap(from sdk.AccAddress, to sdk.AccAddress, recipientOtherChain,
 	senderOtherChain string, randomNumberHash tmbytes.HexBytes, timestamp int64,
-	amount sdk.Coins, expectedIncome string, heightSpan int64, crossChain bool) MsgCreateAtomicSwap {
+	amount sdk.Coins, heightSpan uint64) MsgCreateAtomicSwap {
 	return MsgCreateAtomicSwap{
 		From:                from,
 		To:                  to,
@@ -64,9 +61,7 @@ func NewMsgCreateAtomicSwap(from sdk.AccAddress, to sdk.AccAddress, recipientOth
 		RandomNumberHash:    randomNumberHash,
 		Timestamp:           timestamp,
 		Amount:              amount,
-		ExpectedIncome:      expectedIncome,
 		HeightSpan:          heightSpan,
-		CrossChain:          crossChain,
 	}
 }
 
@@ -78,10 +73,9 @@ func (msg MsgCreateAtomicSwap) Type() string { return CreateAtomicSwap }
 
 // String prints the MsgCreateAtomicSwap
 func (msg MsgCreateAtomicSwap) String() string {
-	return fmt.Sprintf("AtomicSwap{%v#%v#%v#%v#%v#%v#%v#%v#%v#%v}",
+	return fmt.Sprintf("AtomicSwap{%v#%v#%v#%v#%v#%v#%v#%v}",
 		msg.From, msg.To, msg.RecipientOtherChain, msg.SenderOtherChain,
-		msg.RandomNumberHash, msg.Timestamp, msg.Amount, msg.ExpectedIncome,
+		msg.RandomNumberHash, msg.Timestamp, msg.Amount, msg.HeightSpan)
-		msg.HeightSpan, msg.CrossChain)
 }
 
 // GetInvolvedAddresses gets the addresses involved in a MsgCreateAtomicSwap
@@ -108,14 +102,8 @@ func (msg MsgCreateAtomicSwap) ValidateBasic() error {
 	if len(msg.To) != AddrByteCount {
 		return fmt.Errorf("the expected address length is %d, actual length is %d", AddrByteCount, len(msg.To))
 	}
-	if !msg.CrossChain && msg.RecipientOtherChain != "" {
+	if strings.TrimSpace(msg.RecipientOtherChain) == "" {
-		return errors.New("must leave recipient address on other chain to empty for single chain swap")
+		return errors.New("missing recipient address on other chain")
-	}
-	if !msg.CrossChain && msg.SenderOtherChain != "" {
-		return errors.New("must leave sender address on other chain to empty for single chain swap")
-	}
-	if msg.CrossChain && strings.TrimSpace(msg.RecipientOtherChain) == "" {
-		return errors.New("missing recipient address on other chain for cross chain swap")
 	}
 	if len(msg.RecipientOtherChain) > MaxOtherChainAddrLength {
 		return fmt.Errorf("the length of recipient address on other chain should be less than %d", MaxOtherChainAddrLength)
@@ -135,16 +123,6 @@ func (msg MsgCreateAtomicSwap) ValidateBasic() error {
 	if !msg.Amount.IsValid() {
 		return sdkerrors.Wrap(sdkerrors.ErrInvalidCoins, msg.Amount.String())
 	}
-	if len(msg.ExpectedIncome) > MaxExpectedIncomeLength {
-		return fmt.Errorf("the length of expected income should be less than %d", MaxExpectedIncomeLength)
-	}
-	expectedIncomeCoins, err := sdk.ParseCoins(msg.ExpectedIncome)
-	if err != nil || expectedIncomeCoins == nil {
-		return fmt.Errorf("expected income %s must be in valid format e.g. 10000ukava", msg.ExpectedIncome)
-	}
-	if expectedIncomeCoins.IsAnyGT(msg.Amount) {
-		return fmt.Errorf("expected income %s cannot be greater than amount %s", msg.ExpectedIncome, msg.Amount.String())
-	}
 	if msg.HeightSpan <= 0 {
 		return errors.New("height span must be positive")
 	}

x/bep3/types/msg_test.go

@@ -39,16 +39,12 @@ func TestMsgCreateAtomicSwap(t *testing.T) {
 		randomNumberHash    tmbytes.HexBytes
 		timestamp           int64
 		amount              sdk.Coins
-		expectedIncome      string
+		heightSpan          uint64
-		heightSpan          int64
-		crossChain          bool
 		expectPass          bool
 	}{
-		{"normal", binanceAddrs[0], kavaAddrs[0], "", "", randomNumberHash, timestampInt64, coinsSingle, "50000bnb", 500, false, true},
+		{"normal cross-chain", binanceAddrs[0], kavaAddrs[0], kavaAddrs[0].String(), binanceAddrs[0].String(), randomNumberHash, timestampInt64, coinsSingle, 500, true},
-		{"cross-chain", binanceAddrs[0], kavaAddrs[0], kavaAddrs[0].String(), binanceAddrs[0].String(), randomNumberHash, timestampInt64, coinsSingle, "50000bnb", 80000, true, true},
+		{"without other chain fields", binanceAddrs[0], kavaAddrs[0], "", "", randomNumberHash, timestampInt64, coinsSingle, 500, false},
-		{"with other chain fields", binanceAddrs[0], kavaAddrs[0], kavaAddrs[0].String(), binanceAddrs[0].String(), randomNumberHash, timestampInt64, coinsSingle, "50000bnb", 500, false, false},
+		{"invalid amount", binanceAddrs[0], kavaAddrs[0], "", "", randomNumberHash, timestampInt64, coinsZero, 500, false},
-		{"cross-cross no other chain fields", binanceAddrs[0], kavaAddrs[0], "", "", randomNumberHash, timestampInt64, coinsSingle, "50000bnb", 500, true, false},
-		{"zero coins", binanceAddrs[0], kavaAddrs[0], "", "", randomNumberHash, timestampInt64, coinsZero, "50000bnb", 500, true, false},
 	}
 
 	for i, tc := range tests {
@@ -60,9 +56,7 @@ func TestMsgCreateAtomicSwap(t *testing.T) {
 			tc.randomNumberHash,
 			tc.timestamp,
 			tc.amount,
-			tc.expectedIncome,
 			tc.heightSpan,
-			tc.crossChain,
 		)
 		if tc.expectPass {
 			require.NoError(t, msg.ValidateBasic(), "test: %v", i)

x/bep3/types/params.go

@@ -20,10 +20,10 @@ var (
 	KeyMaxBlockLock     = []byte("MaxBlockLock")
 	KeySupportedAssets  = []byte("SupportedAssets")
 
-	AbsoluteMaximumBlockLock int64 = 10000
+	AbsoluteMaximumBlockLock uint64 = 10000
-	AbsoluteMinimumBlockLock int64 = 50
+	AbsoluteMinimumBlockLock uint64 = 50
-	DefaultMinBlockLock      int64 = 80
+	DefaultMinBlockLock      uint64 = 80
-	DefaultMaxBlockLock      int64 = 600
+	DefaultMaxBlockLock      uint64 = 600
 	DefaultSupportedAssets          = AssetParams{
 		AssetParam{
 			Denom:  "bnb",
@@ -37,8 +37,8 @@ var (
 // Params governance parameters for bep3 module
 type Params struct {
 	BnbDeputyAddress sdk.AccAddress `json:"bnb_deputy_address" yaml:"bnb_deputy_address"` // Bnbchain deputy address
-	MinBlockLock     int64          `json:"min_block_lock" yaml:"min_block_lock"`         // AtomicSwap minimum block lock
+	MinBlockLock     uint64         `json:"min_block_lock" yaml:"min_block_lock"`         // AtomicSwap minimum block lock
-	MaxBlockLock     int64          `json:"max_block_lock" yaml:"max_block_lock"`         // AtomicSwap maximum block lock
+	MaxBlockLock     uint64         `json:"max_block_lock" yaml:"max_block_lock"`         // AtomicSwap maximum block lock
 	SupportedAssets  AssetParams    `json:"supported_assets" yaml:"supported_assets"`     // Supported assets
 }
 
@@ -53,7 +53,7 @@ func (p Params) String() string {
 }
 
 // NewParams returns a new params object
-func NewParams(bnbDeputyAddress sdk.AccAddress, minBlockLock, maxBlockLock int64, supportedAssets AssetParams,
+func NewParams(bnbDeputyAddress sdk.AccAddress, minBlockLock, maxBlockLock uint64, supportedAssets AssetParams,
 ) Params {
 	return Params{
 		BnbDeputyAddress: bnbDeputyAddress,
@@ -159,7 +159,7 @@ func validateBnbDeputyAddressParam(i interface{}) error {
 }
 
 func validateMinBlockLockParam(i interface{}) error {
-	minBlockLock, ok := i.(int64)
+	minBlockLock, ok := i.(uint64)
 	if !ok {
 		return fmt.Errorf("invalid parameter type: %T", i)
 	}
@@ -172,7 +172,7 @@ func validateMinBlockLockParam(i interface{}) error {
 }
 
 func validateMaxBlockLockParam(i interface{}) error {
-	maxBlockLock, ok := i.(int64)
+	maxBlockLock, ok := i.(uint64)
 	if !ok {
 		return fmt.Errorf("invalid parameter type: %T", i)
 	}

x/bep3/types/params_test.go

@@ -29,8 +29,8 @@ func (suite *ParamsTestSuite) TestParamValidation() {
 
 	type args struct {
 		bnbDeputyAddress sdk.AccAddress
-		minBlockLock     int64
+		minBlockLock     uint64
-		maxBlockLock     int64
+		maxBlockLock     uint64
 		supportedAssets  types.AssetParams
 	}
 

x/bep3/types/querier.go

@@ -1,10 +1,15 @@
 package types
 
-import tmbytes "github.com/tendermint/tendermint/libs/bytes"
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	tmbytes "github.com/tendermint/tendermint/libs/bytes"
+)
 
 const (
 	// QueryGetAssetSupply command for getting info about an asset's supply
 	QueryGetAssetSupply = "supply"
+	// QueryGetAssetSupplies command for getting a list of asset supplies
+	QueryGetAssetSupplies = "supplies"
 	// QueryGetAtomicSwap command for getting info about an atomic swap
 	QueryGetAtomicSwap = "swap"
 	// QueryGetAtomicSwaps command for getting a list of atomic swaps
@@ -25,6 +30,20 @@ func NewQueryAssetSupply(denom tmbytes.HexBytes) QueryAssetSupply {
 	}
 }
 
+// QueryAssetSupplies contains the params for an AssetSupplies query
+type QueryAssetSupplies struct {
+	Page  int `json:"page" yaml:"page"`
+	Limit int `json:"limit" yaml:"limit"`
+}
+
+// NewQueryAssetSupplies creates a new QueryAssetSupplies
+func NewQueryAssetSupplies(page int, limit int) QueryAssetSupplies {
+	return QueryAssetSupplies{
+		Page:  page,
+		Limit: limit,
+	}
+}
+
 // QueryAtomicSwapByID contains the params for query 'custom/bep3/swap'
 type QueryAtomicSwapByID struct {
 	SwapID tmbytes.HexBytes `json:"swap_id" yaml:"swap_id"`
@@ -41,12 +60,21 @@ func NewQueryAtomicSwapByID(swapBytes tmbytes.HexBytes) QueryAtomicSwapByID {
 type QueryAtomicSwaps struct {
 	Page       int            `json:"page" yaml:"page"`
 	Limit      int            `json:"limit" yaml:"limit"`
+	Involve    sdk.AccAddress `json:"involve" yaml:"involve"`
+	Expiration uint64         `json:"expiration" yaml:"expiration"`
+	Status     SwapStatus     `json:"status" yaml:"status"`
+	Direction  SwapDirection  `json:"direction" yaml:"direction"`
 }
 
-// NewQueryAtomicSwaps creates a new QueryAtomicSwaps
+// NewQueryAtomicSwaps creates a new instance of QueryAtomicSwaps
-func NewQueryAtomicSwaps(page int, limit int) QueryAtomicSwaps {
+func NewQueryAtomicSwaps(page, limit int, involve sdk.AccAddress, expiration uint64,
+	status SwapStatus, direction SwapDirection) QueryAtomicSwaps {
 	return QueryAtomicSwaps{
 		Page:       page,
 		Limit:      limit,
+		Involve:    involve,
+		Expiration: expiration,
+		Status:     status,
+		Direction:  direction,
 	}
 }

x/bep3/types/swap.go

@@ -17,7 +17,7 @@ import (
 type AtomicSwap struct {
 	Amount              sdk.Coins        `json:"amount"  yaml:"amount"`
 	RandomNumberHash    tmbytes.HexBytes `json:"random_number_hash"  yaml:"random_number_hash"`
-	ExpireHeight        int64            `json:"expire_height"  yaml:"expire_height"`
+	ExpireHeight        uint64           `json:"expire_height"  yaml:"expire_height"`
 	Timestamp           int64            `json:"timestamp"  yaml:"timestamp"`
 	Sender              sdk.AccAddress   `json:"sender"  yaml:"sender"`
 	Recipient           sdk.AccAddress   `json:"recipient"  yaml:"recipient"`
@@ -30,8 +30,8 @@ type AtomicSwap struct {
 }
 
 // NewAtomicSwap returns a new AtomicSwap
-func NewAtomicSwap(amount sdk.Coins, randomNumberHash tmbytes.HexBytes, expireHeight, timestamp int64, sender,
+func NewAtomicSwap(amount sdk.Coins, randomNumberHash tmbytes.HexBytes, expireHeight uint64, timestamp int64,
-	recipient sdk.AccAddress, senderOtherChain string, recipientOtherChain string, closedBlock int64,
+	sender, recipient sdk.AccAddress, senderOtherChain string, recipientOtherChain string, closedBlock int64,
 	status SwapStatus, crossChain bool, direction SwapDirection) AtomicSwap {
 	return AtomicSwap{
 		Amount:              amount,
@@ -197,6 +197,16 @@ func (status *SwapStatus) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+// IsValid returns true if the swap status is valid and false otherwise.
+func (status SwapStatus) IsValid() bool {
+	if status == Open ||
+		status == Completed ||
+		status == Expired {
+		return true
+	}
+	return false
+}
+
 // SwapDirection is the direction of an AtomicSwap
 type SwapDirection byte
 
@@ -245,3 +255,12 @@ func (direction *SwapDirection) UnmarshalJSON(data []byte) error {
 	*direction = NewSwapDirectionFromString(s)
 	return nil
 }
+
+// IsValid returns true if the swap direction is valid and false otherwise.
+func (direction SwapDirection) IsValid() bool {
+	if direction == Incoming ||
+		direction == Outgoing {
+		return true
+	}
+	return false
+}

x/bep3/types/swap_test.go

@@ -32,7 +32,7 @@ func (suite *AtomicSwapTestSuite) SetupTest() {
 	for i := 0; i < 10; i++ {
 		timestamp := ts(i)
 		randomNumber, _ := types.GenerateSecureRandomNumber()
-		randomNumberHash := types.CalculateRandomHash(randomNumber.Bytes(), timestamp)
+		randomNumberHash := types.CalculateRandomHash(randomNumber[:], timestamp)
 		timestamps = append(timestamps, timestamp)
 		randomNumberHashes = append(randomNumberHashes, randomNumberHash)
 	}