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key.go
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key.go
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package types
import sdk "github.com/cosmos/cosmos-sdk/types"
const (
// ModuleName The name that will be used throughout the module
ModuleName = "pricefeed"
// StoreKey Top level store key where all module items will be stored
StoreKey = ModuleName
// RouterKey Top level router key
RouterKey = ModuleName
// QuerierRoute is the querier route for gov
QuerierRoute = ModuleName
// DefaultParamspace default namestore
DefaultParamspace = ModuleName
)
var (
// CurrentPricePrefix prefix for the current price of an asset
CurrentPricePrefix = []byte{0x00}
// RawPriceFeedPrefix prefix for the raw pricefeed of an asset
RawPriceFeedPrefix = []byte{0x01}
)
// CurrentPriceKey returns the prefix for the current price
func CurrentPriceKey(marketID string) []byte {
return append(CurrentPricePrefix, []byte(marketID)...)
}
// RawPriceIteratorKey returns the prefix for the raw price for a single market
func RawPriceIteratorKey(marketID string) []byte {
return append(
RawPriceFeedPrefix,
lengthPrefixWithByte([]byte(marketID))...,
)
}
// RawPriceKey returns the prefix for the raw price
func RawPriceKey(marketID string, oracleAddr sdk.AccAddress) []byte {
return append(
RawPriceIteratorKey(marketID),
lengthPrefixWithByte(oracleAddr)...,
)
}
// lengthPrefixWithByte returns the input bytes prefixes with one byte containing its length.
// It panics if the input is greater than 255 in length.
func lengthPrefixWithByte(bz []byte) []byte {
length := len(bz)
if length > 255 {
panic("cannot length prefix more than 255 bytes with single byte")
}
return append([]byte{byte(length)}, bz...)
}