92 lines
2.1 KiB
Go
92 lines
2.1 KiB
Go
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package client
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import (
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"context"
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"net/http"
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"os"
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"github.com/ethereum/go-ethereum/common/hexutil"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum-optimism/optimism/op-service/signer"
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optls "github.com/ethereum-optimism/optimism/op-service/tls"
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)
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type SignerClient struct {
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client *rpc.Client
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status string
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logger log.Logger
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}
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func NewSignerClient(logger log.Logger, endpoint string, tlsConfig optls.CLIConfig) (*SignerClient, error) {
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caCert, err := os.ReadFile(tlsConfig.TLSCaCert)
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if err != nil {
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return nil, fmt.Errorf("failed to read tls.ca: %w", err)
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}
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caCertPool := x509.NewCertPool()
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caCertPool.AppendCertsFromPEM(caCert)
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cert, err := tls.LoadX509KeyPair(tlsConfig.TLSCert, tlsConfig.TLSKey)
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if err != nil {
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return nil, fmt.Errorf("failed to read tls.cert or tls.key: %w", err)
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}
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httpClient := &http.Client{
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Transport: &http.Transport{
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TLSClientConfig: &tls.Config{
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RootCAs: caCertPool,
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Certificates: []tls.Certificate{cert},
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},
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},
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}
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rpcClient, err := rpc.DialOptions(context.Background(), endpoint, rpc.WithHTTPClient(httpClient))
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if err != nil {
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return nil, err
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}
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signerClient := &SignerClient{logger: logger, client: rpcClient}
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// Check if reachable
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version, err := signerClient.pingVersion()
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if err != nil {
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return nil, err
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}
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signerClient.status = fmt.Sprintf("ok [version=%v]", version)
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return signerClient, nil
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}
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func (s *SignerClient) pingVersion() (string, error) {
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var v string
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if err := s.client.Call(&v, "health_status"); err != nil {
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return "", err
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}
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return v, nil
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}
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func (s *SignerClient) SignTransaction(
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ctx context.Context,
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tx *types.Transaction,
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) (*types.Transaction, error) {
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args := signer.NewTransactionArgsFromTransaction(tx.ChainId(), nil, tx)
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var result hexutil.Bytes
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if err := s.client.Call(&result, "eth_signTransaction", args); err != nil {
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return nil, fmt.Errorf("eth_signTransaction failed: %w", err)
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}
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signed := &types.Transaction{}
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if err := signed.UnmarshalBinary(result); err != nil {
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return nil, err
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}
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return signed, nil
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}
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