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amount.go
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amount.go
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package types
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
cmmtypes "github.com/bnb-chain/node/common/types"
)
func ConvertBSCAmountToBCAmountBigInt(contractDecimals int8, bscAmount sdk.Int) (sdk.Int, sdk.Error) {
if contractDecimals == cmmtypes.TokenDecimals {
return bscAmount, nil
}
var bcAmount sdk.Int
if contractDecimals >= cmmtypes.TokenDecimals {
decimals := sdk.NewIntWithDecimal(1, int(contractDecimals-cmmtypes.TokenDecimals))
if !bscAmount.Mod(decimals).IsZero() {
return sdk.Int{}, ErrInvalidAmount(fmt.Sprintf("can't convert bep2(decimals: 8) bscAmount to ERC20(decimals: %d) bscAmount", contractDecimals))
}
bcAmount = bscAmount.Div(decimals)
} else {
decimals := sdk.NewIntWithDecimal(1, int(cmmtypes.TokenDecimals-contractDecimals))
bcAmount = bscAmount.Mul(decimals)
}
return bcAmount, nil
}
func ConvertBSCAmountToBCAmount(contractDecimals int8, bscAmount sdk.Int) (int64, sdk.Error) {
res, err := ConvertBSCAmountToBCAmountBigInt(contractDecimals, bscAmount)
if err != nil {
return 0, err
}
// since we only convert bsc amount in transfer out package to bc amount,
// so it should not overflow
return res.Int64(), nil
}
func ConvertBCAmountToBSCAmount(contractDecimals int8, bcAmount int64) (sdk.Int, sdk.Error) {
if contractDecimals == cmmtypes.TokenDecimals {
return sdk.NewInt(bcAmount), nil
}
var bscAmount sdk.Int
if contractDecimals >= cmmtypes.TokenDecimals {
decimals := sdk.NewIntWithDecimal(1, int(contractDecimals-cmmtypes.TokenDecimals))
bscAmount = sdk.NewInt(bcAmount).Mul(decimals)
} else {
decimals := sdk.NewIntWithDecimal(1, int(cmmtypes.TokenDecimals-contractDecimals))
if !sdk.NewInt(bcAmount).Mod(decimals).IsZero() {
return sdk.Int{}, ErrInvalidAmount(fmt.Sprintf("can't convert bep2(decimals: 8) amount to ERC20(decimals: %d) amount", contractDecimals))
}
bscAmount = sdk.NewInt(bcAmount).Div(decimals)
}
return bscAmount, nil
}