0g-chain/tests/util/erc20.go
Robert Pirtle c90c7a8647
test(e2e): test more complex cosmos assert conversion (#1616)
* ensure users can mint() or burn() erc20s

* refactor test setup

* refactor GetErc20Balance for arbitrary erc20 contracts

* move GetErc20Balance() to Chain

* test complex erc20 operations & convert

* undo changes to e2e env
2023-06-06 09:40:17 -07:00

95 lines
2.7 KiB
Go

package util
import (
"math/big"
"github.com/ethereum/go-ethereum/common"
"golang.org/x/crypto/sha3"
)
// EvmContractMethodId encodes a method signature to the method id used in eth calldata.
func EvmContractMethodId(signature string) []byte {
transferFnSignature := []byte(signature)
hash := sha3.NewLegacyKeccak256()
hash.Write(transferFnSignature)
return hash.Sum(nil)[:4]
}
func BuildErc20ApproveCallData(spender common.Address, amount *big.Int) []byte {
methodId := EvmContractMethodId("approve(address,uint256)")
paddedAddress := common.LeftPadBytes(spender.Bytes(), 32)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedAddress...)
data = append(data, paddedAmount...)
return data
}
func BuildErc20TransferCallData(to common.Address, amount *big.Int) []byte {
methodId := EvmContractMethodId("transfer(address,uint256)")
paddedAddress := common.LeftPadBytes(to.Bytes(), 32)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedAddress...)
data = append(data, paddedAmount...)
return data
}
func BuildErc20TransferFromCallData(from common.Address, to common.Address, amount *big.Int) []byte {
methodId := EvmContractMethodId("transferFrom(address,address,uint256)")
paddedFrom := common.LeftPadBytes(from.Bytes(), 32)
paddedTo := common.LeftPadBytes(to.Bytes(), 32)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedFrom...)
data = append(data, paddedTo...)
data = append(data, paddedAmount...)
return data
}
func BuildErc20MintCallData(to common.Address, amount *big.Int) []byte {
methodId := EvmContractMethodId("mint(address,uint256)")
paddedAddress := common.LeftPadBytes(to.Bytes(), 32)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedAddress...)
data = append(data, paddedAmount...)
return data
}
func BuildErc20BurnCallData(from common.Address, amount *big.Int) []byte {
methodId := EvmContractMethodId("burn(address,uint256)")
paddedAddress := common.LeftPadBytes(from.Bytes(), 32)
paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedAddress...)
data = append(data, paddedAmount...)
return data
}
func BuildErc20BalanceOfCallData(address common.Address) []byte {
methodId := EvmContractMethodId("balanceOf(address)")
paddedAddress := common.LeftPadBytes(address.Bytes(), 32)
var data []byte
data = append(data, methodId...)
data = append(data, paddedAddress...)
return data
}