mirror of
https://github.com/0glabs/0g-chain.git
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3366b3b3e3
* add helpers & tests for erc20 eth_call query & transfer * make encoding config public * add evm client & raw evm signer to account * test eip712 signing and broadcast * update for cosmos v46 * update kvtool * temporarily disable ibc tests & skip shutdown * disable all but eip712 test and massively simplify * add EIP712 tx builder & setup basic MsgSend test * reenable all tests * add eip712 test that deposits erc20 into earn * update kvtool to master branch
41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
package util
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import (
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"math/big"
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"github.com/ethereum/go-ethereum/common"
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"golang.org/x/crypto/sha3"
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)
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// EvmContractMethodId encodes a method signature to the method id used in eth calldata.
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func EvmContractMethodId(signature string) []byte {
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transferFnSignature := []byte(signature)
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hash := sha3.NewLegacyKeccak256()
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hash.Write(transferFnSignature)
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return hash.Sum(nil)[:4]
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}
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func BuildErc20TransferCallData(from common.Address, to common.Address, amount *big.Int) []byte {
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methodId := EvmContractMethodId("transfer(address,uint256)")
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paddedAddress := common.LeftPadBytes(to.Bytes(), 32)
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paddedAmount := common.LeftPadBytes(amount.Bytes(), 32)
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var data []byte
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data = append(data, methodId...)
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data = append(data, paddedAddress...)
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data = append(data, paddedAmount...)
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return data
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}
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func BuildErc20BalanceOfCallData(address common.Address) []byte {
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methodId := EvmContractMethodId("balanceOf(address)")
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paddedAddress := common.LeftPadBytes(address.Bytes(), 32)
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var data []byte
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data = append(data, methodId...)
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data = append(data, paddedAddress...)
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return data
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}
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