0g-chain/x/bep3/simulation/operations.go

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package simulation
import (
"fmt"
"math"
"math/rand"
"github.com/cosmos/cosmos-sdk/baseapp"
"github.com/cosmos/cosmos-sdk/codec"
"github.com/cosmos/cosmos-sdk/simapp/helpers"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/x/auth"
"github.com/cosmos/cosmos-sdk/x/simulation"
appparams "github.com/kava-labs/kava/app/params"
"github.com/kava-labs/kava/x/bep3/keeper"
"github.com/kava-labs/kava/x/bep3/types"
)
var (
noOpMsg = simulation.NoOpMsg(types.ModuleName)
)
// Simulation operation weights constants
const (
OpWeightMsgCreateAtomicSwap = "op_weight_msg_create_atomic_swap"
)
// WeightedOperations returns all the operations from the module with their respective weights
func WeightedOperations(
appParams simulation.AppParams, cdc *codec.Codec, ak auth.AccountKeeper, k keeper.Keeper,
) simulation.WeightedOperations {
var weightCreateAtomicSwap int
appParams.GetOrGenerate(cdc, OpWeightMsgCreateAtomicSwap, &weightCreateAtomicSwap, nil,
func(_ *rand.Rand) {
weightCreateAtomicSwap = appparams.DefaultWeightMsgCreateAtomicSwap
},
)
return simulation.WeightedOperations{
simulation.NewWeightedOperation(
weightCreateAtomicSwap,
SimulateMsgCreateAtomicSwap(ak, k),
),
}
}
// SimulateMsgCreateAtomicSwap generates a MsgCreateAtomicSwap with random values
func SimulateMsgCreateAtomicSwap(ak auth.AccountKeeper, k keeper.Keeper) simulation.Operation {
return func(
r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
) (simulation.OperationMsg, []simulation.FutureOperation, error) {
senderAddr := k.GetBnbDeputyAddress(ctx)
sender, found := simulation.FindAccount(accs, senderAddr)
if !found {
return noOpMsg, nil, nil
}
recipient, _ := simulation.RandomAcc(r, accs)
recipientOtherChain := simulation.RandStringOfLength(r, 43)
senderOtherChain := simulation.RandStringOfLength(r, 43)
// Generate cryptographically strong pseudo-random number
randomNumber, err := simulation.RandPositiveInt(r, sdk.NewInt(math.MaxInt64))
if err != nil {
return noOpMsg, nil, err
}
// Must use current blocktime instead of 'now' since initial blocktime was randomly generated
timestamp := ctx.BlockTime().Unix()
randomNumberHash := types.CalculateRandomHash(randomNumber.BigInt().Bytes(), timestamp)
// Randomly select an asset from supported assets
assets, found := k.GetAssets(ctx)
if !found {
return noOpMsg, nil, fmt.Errorf("no supported assets found")
}
asset := assets[r.Intn(len(assets))]
// Check that the sender has coins of this type
senderAcc := ak.GetAccount(ctx, senderAddr)
fees, err := simulation.RandomFees(r, ctx, senderAcc.SpendableCoins(ctx.BlockTime()))
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
availableAmount := senderAcc.SpendableCoins(ctx.BlockTime()).Sub(fees).AmountOf(asset.Denom)
// Get an amount of coins between 0.1 and 2% of total coins
amount := availableAmount.Quo(sdk.NewInt(int64(simulation.RandIntBetween(r, 50, 1000))))
if amount.IsZero() {
return simulation.NewOperationMsgBasic(types.ModuleName, fmt.Sprintf("no-operation (all funds exhausted for asset %s)", asset.Denom), "", false, nil), nil, nil
}
coin := sdk.NewCoin(asset.Denom, amount)
coins := sdk.NewCoins(coin)
expectedIncome := coin.String()
// We're assuming that sims are run with -NumBlocks=100
heightSpan := int64(55)
crossChain := true
msg := types.NewMsgCreateAtomicSwap(
senderAddr, recipient.Address, recipientOtherChain, senderOtherChain, randomNumberHash,
timestamp, coins, expectedIncome, heightSpan, crossChain,
)
tx := helpers.GenTx(
[]sdk.Msg{msg},
fees,
helpers.DefaultGenTxGas,
chainID,
[]uint64{senderAcc.GetAccountNumber()},
[]uint64{senderAcc.GetSequence()},
sender.PrivKey,
)
_, result, err := app.Deliver(tx)
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
// If created, construct a MsgClaimAtomicSwap or MsgRefundAtomicSwap future operation
var futureOp simulation.FutureOperation
swapID := types.CalculateSwapID(msg.RandomNumberHash, msg.From, msg.SenderOtherChain)
if r.Intn(100) < 50 {
// Claim future operation
executionBlock := 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
futureOp = simulation.FutureOperation{
BlockHeight: int(executionBlock),
Op: operationRefundAtomicSwap(ak, k, swapID),
}
}
return simulation.NewOperationMsg(msg, true, result.Log), []simulation.FutureOperation{futureOp}, nil
}
}
func operationClaimAtomicSwap(ak auth.AccountKeeper, k keeper.Keeper, swapID []byte, randomNumber []byte) simulation.Operation {
return func(
r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
) (simulation.OperationMsg, []simulation.FutureOperation, error) {
simAccount, _ := simulation.RandomAcc(r, accs)
acc := ak.GetAccount(ctx, simAccount.Address)
msg := types.NewMsgClaimAtomicSwap(acc.GetAddress(), swapID, randomNumber)
fees, err := simulation.RandomFees(r, ctx, acc.SpendableCoins(ctx.BlockTime()))
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
tx := helpers.GenTx(
[]sdk.Msg{msg},
fees,
helpers.DefaultGenTxGas,
chainID,
[]uint64{acc.GetAccountNumber()},
[]uint64{acc.GetSequence()},
simAccount.PrivKey,
)
_, result, err := app.Deliver(tx)
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
return simulation.NewOperationMsg(msg, true, result.Log), nil, nil
}
}
func operationRefundAtomicSwap(ak auth.AccountKeeper, k keeper.Keeper, swapID []byte) simulation.Operation {
return func(
r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
) (simulation.OperationMsg, []simulation.FutureOperation, error) {
simAccount, _ := simulation.RandomAcc(r, accs)
acc := ak.GetAccount(ctx, simAccount.Address)
msg := types.NewMsgRefundAtomicSwap(acc.GetAddress(), swapID)
fees, err := simulation.RandomFees(r, ctx, acc.SpendableCoins(ctx.BlockTime()))
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
tx := helpers.GenTx(
[]sdk.Msg{msg},
fees,
helpers.DefaultGenTxGas,
chainID,
[]uint64{acc.GetAccountNumber()},
[]uint64{acc.GetSequence()},
simAccount.PrivKey,
)
_, result, err := app.Deliver(tx)
if err != nil {
return simulation.NoOpMsg(types.ModuleName), nil, err
}
return simulation.NewOperationMsg(msg, true, result.Log), nil, nil
}
}