0g-chain/x/evmutil/keeper/conversion_evm_native_bep3.go

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package keeper
import (
"math/big"
errorsmod "cosmossdk.io/errors"
"github.com/kava-labs/kava/x/evmutil/types"
)
var (
bep3Denoms = map[string]bool{
"bnb": true,
"busd": true,
"btcb": true,
"xrpb": true,
}
bep3ConversionFactor = new(big.Int).Exp(big.NewInt(10), big.NewInt(10), nil)
)
func isBep3Asset(denom string) bool {
return bep3Denoms[denom]
}
// convertBep3CoinAmountToERC20Amount converts a bep3 coin amount with 8 decimals
// to the equivalent ERC20 token with 18 decimals.
func convertBep3CoinAmountToERC20Amount(amount *big.Int) (erc20Amount *big.Int) {
return new(big.Int).Mul(amount, bep3ConversionFactor)
}
// convertBep3ERC20AmountToCoinAmount converts a bep3 ERC20 token with 18 decimals
// to the equivalent coin amount with 8 decimals, and dropping the remainder.
func convertBep3ERC20AmountToCoinAmount(amount *big.Int) (coinAmount *big.Int) {
return new(big.Int).Div(amount, bep3ConversionFactor)
}
// bep3ERC20AmountToCoinMintAndERC20LockAmount converts 18 decimals erc20 bep3
// amount to the equivalent 8 decimals coin amount to mint, and the
// 18 decimals erc20 bep3 amount to lock for the converted coin amount.
func bep3ERC20AmountToCoinMintAndERC20LockAmount(amount *big.Int) (
amountToMint *big.Int, amountToLock *big.Int, err error,
) {
amountToMint = convertBep3ERC20AmountToCoinAmount(amount)
// make sure we have at least 1 sdk.Coin to mint
if amountToMint.Cmp(big.NewInt(0)) == 0 {
err := errorsmod.Wrapf(
types.ErrInsufficientConversionAmount,
"unable to convert bep3 coin due converting less than 1 native unit",
)
return nil, nil, err
}
amountToLock = convertBep3CoinAmountToERC20Amount(amountToMint)
return amountToMint, amountToLock, nil
}