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token_pair.go
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token_pair.go
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package types
import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/ethereum/go-ethereum/common"
ethermint "github.com/evmos/ethermint/types"
"github.com/tendermint/tendermint/crypto/tmhash"
)
// NewTokenPair returns an instance of TokenPair
func NewTokenPair(erc20Address common.Address, denom string, enabled bool, contractOwner Owner) TokenPair {
return TokenPair{
Erc20Address: erc20Address.String(),
Denom: denom,
Enabled: true,
ContractOwner: contractOwner,
}
}
// GetID returns the SHA256 hash of the ERC20 address and denomination
func (tp TokenPair) GetID() []byte {
id := tp.Erc20Address + "|" + tp.Denom
return tmhash.Sum([]byte(id))
}
// GetErc20Contract casts the hex string address of the ERC20 to common.Address
func (tp TokenPair) GetERC20Contract() common.Address {
return common.HexToAddress(tp.Erc20Address)
}
// Validate performs a stateless validation of a TokenPair
func (tp TokenPair) Validate() error {
if err := sdk.ValidateDenom(tp.Denom); err != nil {
return err
}
if err := ethermint.ValidateAddress(tp.Erc20Address); err != nil {
return err
}
return nil
}
// IsNativeCoin returns true if the owner of the ERC20 contract is the
// erc20 module account
func (tp TokenPair) IsNativeCoin() bool {
return tp.ContractOwner == OWNER_MODULE
}
// IsNativeERC20 returns true if the owner of the ERC20 contract not the
// erc20 module account
func (tp TokenPair) IsNativeERC20() bool {
return tp.ContractOwner == OWNER_EXTERNAL
}