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market.go
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market.go
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package types
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/cosmos-sdk/types/address"
)
func DeriveMarketEscrowAddress(marketId uint64) sdk.AccAddress {
return address.Module(ModuleName, []byte(fmt.Sprintf("MarketEscrowAddress/%d", marketId)))
}
func NewMarket(
marketId uint64, baseDenom, quoteDenom string, makerFeeRate, takerFeeRate, orderSourceFeeRatio sdk.Dec) Market {
return Market{
Id: marketId,
BaseDenom: baseDenom,
QuoteDenom: quoteDenom,
EscrowAddress: DeriveMarketEscrowAddress(marketId).String(),
MakerFeeRate: makerFeeRate,
TakerFeeRate: takerFeeRate,
OrderSourceFeeRatio: orderSourceFeeRatio,
}
}
func (market Market) Validate() error {
if market.Id == 0 {
return fmt.Errorf("id must not be 0")
}
if err := sdk.ValidateDenom(market.BaseDenom); err != nil {
return fmt.Errorf("invalid base denom: %w", err)
}
if err := sdk.ValidateDenom(market.QuoteDenom); err != nil {
return fmt.Errorf("invalid quote denom: %w", err)
}
if market.BaseDenom == market.QuoteDenom {
return fmt.Errorf("base denom and quote denom must not be same: %s", market.BaseDenom)
}
if _, err := sdk.AccAddressFromBech32(market.EscrowAddress); err != nil {
return fmt.Errorf("invalid escrow address: %w", err)
}
if err := ValidateFees(
market.MakerFeeRate, market.TakerFeeRate, market.OrderSourceFeeRatio); err != nil {
return err
}
return nil
}
func (market Market) MustGetEscrowAddress() sdk.AccAddress {
return sdk.MustAccAddressFromBech32(market.EscrowAddress)
}
func NewMarketState(lastPrice *sdk.Dec) MarketState {
return MarketState{
LastPrice: lastPrice,
LastMatchingHeight: -1, // Not matched
}
}
func (marketState MarketState) Validate() error {
if marketState.LastPrice != nil {
if !marketState.LastPrice.IsPositive() {
return fmt.Errorf("last price must be positive: %s", marketState.LastPrice)
}
if _, valid := ValidateTickPrice(*marketState.LastPrice); !valid {
return fmt.Errorf("invalid last price tick: %s", marketState.LastPrice)
}
}
if marketState.LastMatchingHeight < -1 {
return fmt.Errorf("invalid last matching height: %d", marketState.LastMatchingHeight)
}
if marketState.LastPrice != nil && marketState.LastMatchingHeight == -1 ||
marketState.LastPrice == nil && marketState.LastMatchingHeight >= 0 {
return fmt.Errorf(
"inconsistent last matching info: %s, %d",
marketState.LastPrice, marketState.LastMatchingHeight)
}
return nil
}