0g-chain/tests/util/evmsigner.go
Robert Pirtle f051ea3a49
Add EVM signer to e2e test SigningAccounts (#1482)
* rename cosmos-sdk specific signers

* add evm_signer util

* add utilities for converting between addresses

* rename signers

* dont include e2e tests in docker image

* add evmsigner to e2e SigningAccount

* add new whale account that is an EthAccount

* use ethsecp256k1 for e2e SigningAccounts

* wait for evm tx to be committed to block

also add example evm tx tests! 🎉

* check remainined balance is expected

* check balance via evm
2023-03-01 17:05:53 -08:00

104 lines
2.5 KiB
Go

package util
import (
"context"
"crypto/ecdsa"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/accounts/abi/bind"
"github.com/ethereum/go-ethereum/common"
ethtypes "github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethclient"
)
type EvmTxRequest struct {
Tx *ethtypes.Transaction
Data interface{}
}
type EvmTxResponse struct {
Request EvmTxRequest
TxHash common.Hash
Err error
}
type EvmFailedToSignError struct{ Err error }
func (e EvmFailedToSignError) Error() string {
return fmt.Sprintf("failed to sign tx: %s", e.Err)
}
type EvmFailedToBroadcastError struct{ Err error }
func (e EvmFailedToBroadcastError) Error() string {
return fmt.Sprintf("failed to broadcast tx: %s", e.Err)
}
// EvmSigner manages signing and broadcasting requests to transfer Erc20 tokens
// Will work for calling all contracts that have func signature `transfer(address,uint256)`
type EvmSigner struct {
auth *bind.TransactOpts
signerAddress common.Address
EvmClient *ethclient.Client
}
func NewEvmSigner(
evmClient *ethclient.Client,
privKey *ecdsa.PrivateKey,
chainId *big.Int,
) (*EvmSigner, error) {
auth, err := bind.NewKeyedTransactorWithChainID(privKey, chainId)
if err != nil {
return &EvmSigner{}, err
}
publicKey := privKey.Public()
publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
if !ok {
return &EvmSigner{}, fmt.Errorf("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
}
return &EvmSigner{
auth: auth,
signerAddress: crypto.PubkeyToAddress(*publicKeyECDSA),
EvmClient: evmClient,
}, nil
}
func (s *EvmSigner) Run(requests <-chan EvmTxRequest) <-chan EvmTxResponse {
responses := make(chan EvmTxResponse)
// receive tx requests, sign & broadcast them.
// Responses are sent once the tx is added to the pending tx pool.
// To see result, use TransactionReceipt after tx has been included in a block.
go func() {
for {
// wait for incoming request
req := <-requests
signedTx, err := s.auth.Signer(s.signerAddress, req.Tx)
if err != nil {
err = EvmFailedToSignError{Err: err}
} else {
err = s.EvmClient.SendTransaction(context.Background(), signedTx)
if err != nil {
err = EvmFailedToBroadcastError{Err: err}
}
}
responses <- EvmTxResponse{
Request: req,
TxHash: signedTx.Hash(),
Err: err,
}
}
}()
return responses
}
func (s *EvmSigner) Address() common.Address {
return s.signerAddress
}