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token.go
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token.go
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package types
import (
"math"
"strconv"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
// TokenI defines the interface for Token
type TokenI interface {
GetMinUnit() string
GetScale() uint32
ToMainCoin(coin sdk.Coin) (sdk.DecCoin, error)
ToMinCoin(coin sdk.DecCoin) (sdk.Coin, error)
}
// MockToken represents a mock implementation for TokenI
type MockToken struct {
Symbol string
MinUnit string
Scale uint32
}
func (token MockToken) ToMainCoin(coin sdk.Coin) (sdk.DecCoin, error) {
if token.Symbol != coin.Denom && token.MinUnit != coin.Denom {
return sdk.NewDecCoinFromDec(coin.Denom, sdk.ZeroDec()), sdkerrors.Wrapf(ErrInvalidPricing, "token not match")
}
if token.Symbol == coin.Denom {
return sdk.NewDecCoin(coin.Denom, coin.Amount), nil
}
precision := math.Pow10(int(token.Scale))
precisionStr := strconv.FormatFloat(precision, 'f', 0, 64)
precisionDec, err := sdk.NewDecFromStr(precisionStr)
if err != nil {
return sdk.DecCoin{}, err
}
// dest amount = src amount / 10^(scale)
amount := sdk.NewDecFromInt(coin.Amount).Quo(precisionDec)
return sdk.NewDecCoinFromDec(token.Symbol, amount), nil
}
func (token MockToken) ToMinCoin(coin sdk.DecCoin) (sdk.Coin, error) {
if token.Symbol != coin.Denom && token.MinUnit != coin.Denom {
return sdk.NewCoin(coin.Denom, sdk.ZeroInt()), sdkerrors.Wrapf(ErrInvalidPricing, "token not match")
}
if token.MinUnit == coin.Denom {
return sdk.NewCoin(coin.Denom, coin.Amount.TruncateInt()), nil
}
precision := math.Pow10(int(token.Scale))
precisionStr := strconv.FormatFloat(precision, 'f', 0, 64)
precisionDec, err := sdk.NewDecFromStr(precisionStr)
if err != nil {
return sdk.Coin{}, err
}
// dest amount = src amount * 10^(dest scale)
amount := coin.Amount.Mul(precisionDec)
return sdk.NewCoin(token.MinUnit, amount.TruncateInt()), nil
}
// GetSymbol gets the symbol
func (token MockToken) GetSymbol() string {
return token.Symbol
}
// GetMinUnit gets the min unit
func (token MockToken) GetMinUnit() string {
return token.MinUnit
}
// GetScale gets the scale
func (token MockToken) GetScale() uint32 {
return token.Scale
}