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address review comments for pricefeed

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This commit is contained in:
Kevin Davis 2019-12-04 11:32:08 -05:00
parent 1a9b8514c9
commit bf83a9bf8f
10 changed files with 195 additions and 169 deletions
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14
x/pricefeed/abci.go
View File

@ -1,17 +1,25 @@
package pricefeed
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// EndBlocker updates the current pricefeed
func EndBlocker(ctx sdk.Context, k Keeper) {
// Update the current price of each asset.
for _, a := range k.GetAssetParams(ctx) {
for _, a := range k.GetMarketParams(ctx) {
if a.Active {
err := k.SetCurrentPrices(ctx, a.AssetCode)
err := k.SetCurrentPrices(ctx, a.MarketID)
if err != nil {
// TODO emit an event that price failed to update
// In the event of failure, emit an event.
ctx.EventManager().EmitEvent(
sdk.NewEvent(
EventTypeNoValidPrices,
sdk.NewAttribute(AttributeKeyPriceUpdateFailed, fmt.Sprintf("%s", a.MarketID)),
),
)
continue
}
}

18
x/pricefeed/alias.go
View File

@ -17,6 +17,8 @@ const (
CodeInvalidPrice = types.CodeInvalidPrice
CodeInvalidAsset = types.CodeInvalidAsset
CodeInvalidOracle = types.CodeInvalidOracle
EventTypeNoValidPrices = types.EventTypeNoValidPrices
AttributeKeyPriceUpdateFailed = types.AttributeKeyPriceUpdateFailed
ModuleName = types.ModuleName
StoreKey = types.StoreKey
RouterKey = types.RouterKey
@ -52,22 +54,22 @@ var (
// variable aliases
ModuleCdc = types.ModuleCdc
KeyAssets = types.KeyAssets
KeyMarkets = types.KeyMarkets
)
type (
Market = types.Market
Markets = types.Markets
Oracle = types.Oracle
Oracles = types.Oracles
CurrentPrice = types.CurrentPrice
PostedPrice = types.PostedPrice
SortDecs = types.SortDecs
GenesisState = types.GenesisState
MsgPostPrice = types.MsgPostPrice
Params = types.Params
ParamSubspace = types.ParamSubspace
QueryRawPricesResp = types.QueryRawPricesResp
QueryAssetsResp = types.QueryAssetsResp
Asset = types.Asset
Assets = types.Assets
Oracle = types.Oracle
Oracles = types.Oracles
CurrentPrice = types.CurrentPrice
PostedPrice = types.PostedPrice
SortDecs = types.SortDecs
Keeper = keeper.Keeper
)

10
x/pricefeed/genesis.go
View File

@ -12,16 +12,16 @@ func InitGenesis(ctx sdk.Context, keeper Keeper, data GenesisState) {
// Iterate through the posted prices and set them in the store
for _, pp := range data.PostedPrices {
_, err := keeper.SetPrice(ctx, pp.OracleAddress, pp.AssetCode, pp.Price, pp.Expiry)
_, err := keeper.SetPrice(ctx, pp.OracleAddress, pp.MarketID, pp.Price, pp.Expiry)
if err != nil {
panic(err)
}
}
// Set the current price (if any) based on what's now in the store
for _, a := range data.Params.Assets {
for _, a := range data.Params.Markets {
if a.Active {
_ = keeper.SetCurrentPrices(ctx, a.AssetCode)
_ = keeper.SetCurrentPrices(ctx, a.MarketID)
}
}
}
@ -33,8 +33,8 @@ func ExportGenesis(ctx sdk.Context, keeper Keeper) GenesisState {
params := keeper.GetParams(ctx)
var postedPrices []PostedPrice
for _, asset := range keeper.GetAssetParams(ctx) {
pp := keeper.GetRawPrices(ctx, asset.AssetCode)
for _, asset := range keeper.GetMarketParams(ctx) {
pp := keeper.GetRawPrices(ctx, asset.MarketID)
postedPrices = append(postedPrices, pp...)
}

92
x/pricefeed/keeper/keeper.go
View File

@ -41,13 +41,13 @@ func NewKeeper(
func (k Keeper) SetPrice(
ctx sdk.Context,
oracle sdk.AccAddress,
assetCode string,
marketID string,
price sdk.Dec,
expiry time.Time) (types.PostedPrice, sdk.Error) {
// If the expiry is less than or equal to the current blockheight, we consider the price valid
if expiry.After(ctx.BlockTime()) {
store := ctx.KVStore(k.storeKey)
prices := k.GetRawPrices(ctx, assetCode)
prices := k.GetRawPrices(ctx, marketID)
var index int
found := false
for i := range prices {
@ -60,17 +60,17 @@ func (k Keeper) SetPrice(
// set the price for that particular oracle
if found {
prices[index] = types.PostedPrice{
AssetCode: assetCode, OracleAddress: oracle,
MarketID: marketID, OracleAddress: oracle,
Price: price, Expiry: expiry}
} else {
prices = append(prices, types.PostedPrice{
AssetCode: assetCode, OracleAddress: oracle,
MarketID: marketID, OracleAddress: oracle,
Price: price, Expiry: expiry})
index = len(prices) - 1
}
store.Set(
[]byte(types.RawPriceFeedPrefix+assetCode), k.cdc.MustMarshalBinaryBare(prices),
[]byte(types.RawPriceFeedPrefix+marketID), k.cdc.MustMarshalBinaryBare(prices),
)
return prices[index], nil
}
@ -79,67 +79,74 @@ func (k Keeper) SetPrice(
}
// SetCurrentPrices updates the price of an asset to the meadian of all valid oracle inputs
func (k Keeper) SetCurrentPrices(ctx sdk.Context, assetCode string) sdk.Error {
_, ok := k.GetAsset(ctx, assetCode)
func (k Keeper) SetCurrentPrices(ctx sdk.Context, marketID string) sdk.Error {
_, ok := k.GetMarket(ctx, marketID)
if !ok {
return types.ErrInvalidAsset(k.codespace)
}
prices := k.GetRawPrices(ctx, assetCode)
prices := k.GetRawPrices(ctx, marketID)
var notExpiredPrices []types.CurrentPrice
// filter out expired prices
for _, v := range prices {
if v.Expiry.After(ctx.BlockTime()) {
notExpiredPrices = append(notExpiredPrices, types.CurrentPrice{
AssetCode: v.AssetCode,
MarketID: v.MarketID,
Price: v.Price,
})
}
}
l := len(notExpiredPrices)
var medianPrice sdk.Dec
// TODO make threshold for acceptance (ie. require 51% of oracles to have posted valid prices
if l == 0 {
// Error if there are no valid prices in the raw pricefeed
return types.ErrNoValidPrice(k.codespace)
} else if l == 1 {
// Return immediately if there's only one price
medianPrice = notExpiredPrices[0].Price
} else {
// sort the prices
sort.Slice(notExpiredPrices, func(i, j int) bool {
return notExpiredPrices[i].Price.LT(notExpiredPrices[j].Price)
})
// If there's an even number of prices
if l%2 == 0 {
// TODO make sure this is safe.
// Since it's a price and not a balance, division with precision loss is OK.
price1 := notExpiredPrices[l/2-1].Price
price2 := notExpiredPrices[l/2].Price
sum := price1.Add(price2)
divsor, _ := sdk.NewDecFromStr("2")
medianPrice = sum.Quo(divsor)
} else {
// integer division, so we'll get an integer back, rounded down
medianPrice = notExpiredPrices[l/2].Price
}
medianPrice, err := k.CalculateMedianPrice(ctx, notExpiredPrices)
if err != nil {
return err
}
store := ctx.KVStore(k.storeKey)
currentPrice := types.CurrentPrice{
AssetCode: assetCode,
MarketID: marketID,
Price: medianPrice,
}
store.Set(
[]byte(types.CurrentPricePrefix+assetCode), k.cdc.MustMarshalBinaryBare(currentPrice),
[]byte(types.CurrentPricePrefix+marketID), k.cdc.MustMarshalBinaryBare(currentPrice),
)
return nil
}
// CalculateMedianPrice calculates the median prices for the input prices.
func (k Keeper) CalculateMedianPrice(ctx sdk.Context, prices []types.CurrentPrice) (sdk.Dec, sdk.Error) {
l := len(prices)
if l == 0 {
// Error if there are no valid prices in the raw pricefeed
return sdk.Dec{}, types.ErrNoValidPrice(k.codespace)
} else if l == 1 {
// Return immediately if there's only one price
return prices[0].Price, nil
} else {
// sort the prices
sort.Slice(prices, func(i, j int) bool {
return prices[i].Price.LT(prices[j].Price)
})
// for even numbers of prices, the median is calculated as the mean of the two middle prices
if l%2 == 0 {
median := k.calculateMeanPrice(ctx, prices[l/2-1:l/2+1])
return median, nil
}
// for odd numbers of prices, return the middle element
return prices[l/2].Price, nil
}
}
func (k Keeper) calculateMeanPrice(ctx sdk.Context, prices []types.CurrentPrice) sdk.Dec {
sum := prices[0].Price.Add(prices[1].Price)
mean := sum.Quo(sdk.NewDec(2))
return mean
}
// GetCurrentPrice fetches the current median price of all oracles for a specific asset
func (k Keeper) GetCurrentPrice(ctx sdk.Context, assetCode string) types.CurrentPrice {
func (k Keeper) GetCurrentPrice(ctx sdk.Context, marketID string) types.CurrentPrice {
store := ctx.KVStore(k.storeKey)
bz := store.Get([]byte(types.CurrentPricePrefix + assetCode))
bz := store.Get([]byte(types.CurrentPricePrefix + marketID))
// TODO panic or return error if not found
var price types.CurrentPrice
k.cdc.MustUnmarshalBinaryBare(bz, &price)
@ -147,14 +154,15 @@ func (k Keeper) GetCurrentPrice(ctx sdk.Context, assetCode string) types.Current
}
// GetRawPrices fetches the set of all prices posted by oracles for an asset
func (k Keeper) GetRawPrices(ctx sdk.Context, assetCode string) []types.PostedPrice {
func (k Keeper) GetRawPrices(ctx sdk.Context, marketID string) []types.PostedPrice {
store := ctx.KVStore(k.storeKey)
bz := store.Get([]byte(types.RawPriceFeedPrefix + assetCode))
bz := store.Get([]byte(types.RawPriceFeedPrefix + marketID))
var prices []types.PostedPrice
k.cdc.MustUnmarshalBinaryBare(bz, &prices)
return prices
}
// Codespace return the codespace for the keeper
func (k Keeper) Codespace() sdk.CodespaceType {
return k.codespace
}

56
x/pricefeed/keeper/keeper_test.go
View File

@ -12,8 +12,8 @@ import (
"github.com/kava-labs/kava/x/pricefeed/types"
)
// TestKeeper_SetGetAsset tests adding assets to the pricefeed, getting assets from the store
func TestKeeper_SetGetAsset(t *testing.T) {
// TestKeeper_SetGetMarket tests adding markets to the pricefeed, getting markets from the store
func TestKeeper_SetGetMarket(t *testing.T) {
helper := getMockApp(t, 0, types.GenesisState{}, nil)
header := abci.Header{
Height: helper.mApp.LastBlockHeight() + 1,
@ -21,32 +21,32 @@ func TestKeeper_SetGetAsset(t *testing.T) {
helper.mApp.BeginBlock(abci.RequestBeginBlock{Header: header})
ctx := helper.mApp.BaseApp.NewContext(false, header)
ap := types.Params{
Assets: []types.Asset{
types.Asset{AssetCode: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
mp := types.Params{
Markets: types.Markets{
types.Market{MarketID: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
},
}
helper.keeper.SetParams(ctx, ap)
assets := helper.keeper.GetAssetParams(ctx)
require.Equal(t, len(assets), 1)
require.Equal(t, assets[0].AssetCode, "tstusd")
helper.keeper.SetParams(ctx, mp)
markets := helper.keeper.GetMarketParams(ctx)
require.Equal(t, len(markets), 1)
require.Equal(t, markets[0].MarketID, "tstusd")
_, found := helper.keeper.GetAsset(ctx, "tstusd")
_, found := helper.keeper.GetMarket(ctx, "tstusd")
require.Equal(t, found, true)
ap = types.Params{
Assets: []types.Asset{
types.Asset{AssetCode: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
types.Asset{AssetCode: "tst2usd", BaseAsset: "tst2", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
mp = types.Params{
Markets: types.Markets{
types.Market{MarketID: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
types.Market{MarketID: "tst2usd", BaseAsset: "tst2", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
},
}
helper.keeper.SetParams(ctx, ap)
assets = helper.keeper.GetAssetParams(ctx)
require.Equal(t, len(assets), 2)
require.Equal(t, assets[0].AssetCode, "tstusd")
require.Equal(t, assets[1].AssetCode, "tst2usd")
helper.keeper.SetParams(ctx, mp)
markets = helper.keeper.GetMarketParams(ctx)
require.Equal(t, len(markets), 2)
require.Equal(t, markets[0].MarketID, "tstusd")
require.Equal(t, markets[1].MarketID, "tst2usd")
_, found = helper.keeper.GetAsset(ctx, "nan")
_, found = helper.keeper.GetMarket(ctx, "nan")
require.Equal(t, found, false)
}
@ -58,12 +58,12 @@ func TestKeeper_GetSetPrice(t *testing.T) {
Time: tmtime.Now()}
helper.mApp.BeginBlock(abci.RequestBeginBlock{Header: header})
ctx := helper.mApp.BaseApp.NewContext(false, header)
ap := types.Params{
Assets: []types.Asset{
types.Asset{AssetCode: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
mp := types.Params{
Markets: types.Markets{
types.Market{MarketID: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
},
}
helper.keeper.SetParams(ctx, ap)
helper.keeper.SetParams(ctx, mp)
// Set price by oracle 1
_, err := helper.keeper.SetPrice(
ctx, helper.addrs[0], "tstusd",
@ -103,12 +103,12 @@ func TestKeeper_GetSetCurrentPrice(t *testing.T) {
Time: tmtime.Now()}
helper.mApp.BeginBlock(abci.RequestBeginBlock{Header: header})
ctx := helper.mApp.BaseApp.NewContext(false, header)
ap := types.Params{
Assets: []types.Asset{
types.Asset{AssetCode: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
mp := types.Params{
Markets: types.Markets{
types.Market{MarketID: "tstusd", BaseAsset: "tst", QuoteAsset: "usd", Oracles: types.Oracles{}, Active: true},
},
}
helper.keeper.SetParams(ctx, ap)
helper.keeper.SetParams(ctx, mp)
helper.keeper.SetPrice(
ctx, helper.addrs[0], "tstusd",
sdk.MustNewDecFromStr("0.33"),

44
x/pricefeed/keeper/params.go
View File

@ -10,7 +10,7 @@ import (
// GetParams gets params from the store
func (k Keeper) GetParams(ctx sdk.Context) types.Params {
return types.NewParams(k.GetAssetParams(ctx))
return types.NewParams(k.GetMarketParams(ctx))
}
// SetParams updates params in the store
@ -18,47 +18,47 @@ func (k Keeper) SetParams(ctx sdk.Context, params types.Params) {
k.paramstore.SetParamSet(ctx, &params)
}
// GetAssetParams get asset params from store
func (k Keeper) GetAssetParams(ctx sdk.Context) types.Assets {
var assets types.Assets
k.paramstore.Get(ctx, types.KeyAssets, &assets)
return assets
// GetMarketParams get asset params from store
func (k Keeper) GetMarketParams(ctx sdk.Context) types.Markets {
var markets types.Markets
k.paramstore.Get(ctx, types.KeyMarkets, &markets)
return markets
}
// GetOracles returns the oracles in the pricefeed store
func (k Keeper) GetOracles(ctx sdk.Context, assetCode string) (types.Oracles, error) {
func (k Keeper) GetOracles(ctx sdk.Context, marketID string) (types.Oracles, error) {
for _, a := range k.GetAssetParams(ctx) {
if assetCode == a.AssetCode {
return a.Oracles, nil
for _, m := range k.GetMarketParams(ctx) {
if marketID == m.MarketID {
return m.Oracles, nil
}
}
return types.Oracles{}, fmt.Errorf("asset %s not found", assetCode)
return types.Oracles{}, fmt.Errorf("asset %s not found", marketID)
}
// GetOracle returns the oracle from the store or an error if not found
func (k Keeper) GetOracle(ctx sdk.Context, assetCode string, address sdk.AccAddress) (types.Oracle, error) {
oracles, err := k.GetOracles(ctx, assetCode)
func (k Keeper) GetOracle(ctx sdk.Context, marketID string, address sdk.AccAddress) (types.Oracle, error) {
oracles, err := k.GetOracles(ctx, marketID)
if err != nil {
return types.Oracle{}, fmt.Errorf("asset %s not found", assetCode)
return types.Oracle{}, fmt.Errorf("asset %s not found", marketID)
}
for _, o := range oracles {
if address.Equals(o.Address) {
return o, nil
}
}
return types.Oracle{}, fmt.Errorf("oracle %s not found for asset %s", address, assetCode)
return types.Oracle{}, fmt.Errorf("oracle %s not found for asset %s", address, marketID)
}
// GetAsset returns the asset if it is in the pricefeed system
func (k Keeper) GetAsset(ctx sdk.Context, assetCode string) (types.Asset, bool) {
assets := k.GetAssetParams(ctx)
// GetMarket returns the market if it is in the pricefeed system
func (k Keeper) GetMarket(ctx sdk.Context, marketID string) (types.Market, bool) {
markets := k.GetMarketParams(ctx)
for i := range assets {
if assets[i].AssetCode == assetCode {
return assets[i], true
for i := range markets {
if markets[i].MarketID == marketID {
return markets[i], true
}
}
return types.Asset{}, false
return types.Market{}, false
}

14
x/pricefeed/keeper/querier.go
View File

@ -27,12 +27,12 @@ func NewQuerier(keeper Keeper) sdk.Querier {
}
func queryCurrentPrice(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) (res []byte, err sdk.Error) {
assetCode := path[0]
_, found := keeper.GetAsset(ctx, assetCode)
marketID := path[0]
_, found := keeper.GetMarket(ctx, marketID)
if !found {
return []byte{}, sdk.ErrUnknownRequest("asset not found")
}
currentPrice := keeper.GetCurrentPrice(ctx, assetCode)
currentPrice := keeper.GetCurrentPrice(ctx, marketID)
bz, err2 := codec.MarshalJSONIndent(keeper.cdc, currentPrice)
if err2 != nil {
@ -44,12 +44,12 @@ func queryCurrentPrice(ctx sdk.Context, path []string, req abci.RequestQuery, ke
func queryRawPrices(ctx sdk.Context, path []string, req abci.RequestQuery, keeper Keeper) (res []byte, err sdk.Error) {
var priceList types.QueryRawPricesResp
assetCode := path[0]
_, found := keeper.GetAsset(ctx, assetCode)
marketID := path[0]
_, found := keeper.GetMarket(ctx, marketID)
if !found {
return []byte{}, sdk.ErrUnknownRequest("asset not found")
}
rawPrices := keeper.GetRawPrices(ctx, assetCode)
rawPrices := keeper.GetRawPrices(ctx, marketID)
for _, price := range rawPrices {
priceList = append(priceList, price.String())
}
@ -63,7 +63,7 @@ func queryRawPrices(ctx sdk.Context, path []string, req abci.RequestQuery, keepe
func queryAssets(ctx sdk.Context, req abci.RequestQuery, keeper Keeper) (res []byte, err sdk.Error) {
var assetList types.QueryAssetsResp
assets := keeper.GetAssetParams(ctx)
assets := keeper.GetMarketParams(ctx)
for _, asset := range assets {
assetList = append(assetList, asset.String())
}

40
x/pricefeed/types/asset.go
View File

@ -8,34 +8,34 @@ import (
sdk "github.com/cosmos/cosmos-sdk/types"
)
// Asset struct that represents an asset in the pricefeed
type Asset struct {
AssetCode string `json:"asset_code" yaml:"asset_code"`
// Market struct that represents an asset in the pricefeed
type Market struct {
MarketID string `json:"market_id" yaml:"market_id"`
BaseAsset string `json:"base_asset" yaml:"base_asset"`
QuoteAsset string `json:"quote_asset" yaml:"quote_asset"`
Oracles Oracles `json:"oracles" yaml:"oracles"`
Active bool `json:"active" yaml:"active"`
}
// implement fmt.Stringer
func (a Asset) String() string {
// String implement fmt.Stringer
func (a Market) String() string {
return fmt.Sprintf(`Asset:
Asset Code: %s
Market ID: %s
Base Asset: %s
Quote Asset: %s
Oracles: %s
Active: %t`,
a.AssetCode, a.BaseAsset, a.QuoteAsset, a.Oracles, a.Active)
a.MarketID, a.BaseAsset, a.QuoteAsset, a.Oracles, a.Active)
}
// Assets array type for oracle
type Assets []Asset
// Markets array type for oracle
type Markets []Market
// String implements fmt.Stringer
func (as Assets) String() string {
out := "Assets:\n"
for _, a := range as {
out += fmt.Sprintf("%s\n", a.String())
func (ms Markets) String() string {
out := "Markets:\n"
for _, m := range ms {
out += fmt.Sprintf("%s\n", m.String())
}
return strings.TrimSpace(out)
}
@ -64,13 +64,13 @@ func (os Oracles) String() string {
// CurrentPrice struct that contains the metadata of a current price for a particular asset in the pricefeed module.
type CurrentPrice struct {
AssetCode string `json:"asset_code" yaml:"asset_code"`
MarketID string `json:"market_id" yaml:"market_id"`
Price sdk.Dec `json:"price" yaml:"price"`
}
// PostedPrice struct represented a price for an asset posted by a specific oracle
type PostedPrice struct {
AssetCode string `json:"asset_code" yaml:"asset_code"`
MarketID string `json:"market_id" yaml:"market_id"`
OracleAddress sdk.AccAddress `json:"oracle_address" yaml:"oracle_address"`
Price sdk.Dec `json:"price" yaml:"price"`
Expiry time.Time `json:"expiry" yaml:"expiry"`
@ -78,16 +78,16 @@ type PostedPrice struct {
// implement fmt.Stringer
func (cp CurrentPrice) String() string {
return strings.TrimSpace(fmt.Sprintf(`AssetCode: %s
Price: %s`, cp.AssetCode, cp.Price))
return strings.TrimSpace(fmt.Sprintf(`Market ID: %s
Price: %s`, cp.MarketID, cp.Price))
}
// implement fmt.Stringer
func (pp PostedPrice) String() string {
return strings.TrimSpace(fmt.Sprintf(`AssetCode: %s
OracleAddress: %s
return strings.TrimSpace(fmt.Sprintf(`Market ID: %s
Oracle Address: %s
Price: %s
Expiry: %s`, pp.AssetCode, pp.OracleAddress, pp.Price, pp.Expiry))
Expiry: %s`, pp.MarketID, pp.OracleAddress, pp.Price, pp.Expiry))
}
// SortDecs provides the interface needed to sort sdk.Dec slices

8
x/pricefeed/types/events.go Normal file
View File

@ -0,0 +1,8 @@
package types
// Pricefeed module event types
const (
EventTypeNoValidPrices = "no_valid_prices"
AttributeKeyPriceUpdateFailed = "price_update_failed"
)

22
x/pricefeed/types/params.go
View File

@ -9,8 +9,8 @@ import (
)
var (
// KeyAssets store key for assets
KeyAssets = []byte("assets")
// KeyMarkets store key for markets
KeyMarkets = []byte("Markets")
)
// ParamKeyTable Key declaration for parameters
@ -20,33 +20,33 @@ func ParamKeyTable() params.KeyTable {
// Params params for pricefeed. Can be altered via governance
type Params struct {
Assets []Asset `json:"assets" yaml:"assets"` // Array containing the assets supported by the pricefeed
Markets Markets `json:"markets" yaml:"markets"` // Array containing the markets supported by the pricefeed
}
// ParamSetPairs implements the ParamSet interface and returns all the key/value pairs
// pairs of pricefeed module's parameters.
func (p Params) ParamSetPairs() params.ParamSetPairs {
return params.ParamSetPairs{
{Key: KeyAssets, Value: &p.Assets},
{Key: KeyMarkets, Value: &p.Markets},
}
}
// NewParams creates a new AssetParams object
func NewParams(assets []Asset) Params {
func NewParams(markets Markets) Params {
return Params{
Assets: assets,
Markets: markets,
}
}
// DefaultParams default params for pricefeed
func DefaultParams() Params {
return NewParams(Assets{})
return NewParams(Markets{})
}
// String implements fmt.stringer
func (p Params) String() string {
out := "Params:\n"
for _, a := range p.Assets {
for _, a := range p.Markets {
out += a.String()
}
return strings.TrimSpace(out)
@ -61,9 +61,9 @@ type ParamSubspace interface {
// Validate ensure that params have valid values
func (p Params) Validate() error {
// iterate over assets and verify them
for _, asset := range p.Assets {
if asset.AssetCode == "" {
return fmt.Errorf("invalid asset: %s. missing asset code", asset.String())
for _, asset := range p.Markets {
if asset.MarketID == "" {
return fmt.Errorf("invalid market: %s. missing market ID", asset.String())
}
}
return nil