127 lines
3.8 KiB
Go
127 lines
3.8 KiB
Go
package walletconnect
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import (
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"encoding/json"
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"strings"
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"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/eth-node/types"
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"github.com/status-im/status-go/transactions"
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)
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// sendTransactionParams instead of transactions.SendTxArgs to allow parsing of hex Uint64 with leading 0 ("0x01") and empty hex value ("0x")
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type sendTransactionParams struct {
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transactions.SendTxArgs
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Nonce JSONProxyType `json:"nonce"`
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Gas JSONProxyType `json:"gas"`
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GasPrice JSONProxyType `json:"gasPrice"`
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Value JSONProxyType `json:"value"`
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MaxFeePerGas JSONProxyType `json:"maxFeePerGas"`
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MaxPriorityFeePerGas JSONProxyType `json:"maxPriorityFeePerGas"`
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}
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func (n *sendTransactionParams) UnmarshalJSON(data []byte) error {
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// Avoid recursion
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type Alias sendTransactionParams
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var alias Alias
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// Fix hex values with leading 0 or empty
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fixWCHexValues := func(input []byte) ([]byte, error) {
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hexStr := string(input)
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if !strings.HasPrefix(hexStr, "\"0x") {
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return input, nil
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}
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trimmedStr := strings.TrimPrefix(hexStr, "\"0x")
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fixedStrNoPrefix := strings.TrimLeft(trimmedStr, "0")
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fixedStr := "\"0x" + fixedStrNoPrefix
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if fixedStr == "\"0x\"" {
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fixedStr = "\"0x0\""
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}
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return []byte(fixedStr), nil
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}
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alias.Nonce = JSONProxyType{target: &alias.SendTxArgs.Nonce, transform: fixWCHexValues}
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alias.Gas = JSONProxyType{target: &alias.SendTxArgs.Gas, transform: fixWCHexValues}
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alias.GasPrice = JSONProxyType{target: &alias.SendTxArgs.GasPrice, transform: fixWCHexValues}
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alias.Value = JSONProxyType{target: &alias.SendTxArgs.Value, transform: fixWCHexValues}
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alias.MaxFeePerGas = JSONProxyType{target: &alias.SendTxArgs.MaxFeePerGas, transform: fixWCHexValues}
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alias.MaxPriorityFeePerGas = JSONProxyType{target: &alias.SendTxArgs.MaxPriorityFeePerGas, transform: fixWCHexValues}
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if err := json.Unmarshal(data, &alias); err != nil {
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return err
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}
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*n = sendTransactionParams(alias)
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return nil
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}
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func (n *sendTransactionParams) MarshalJSON() ([]byte, error) {
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return json.Marshal(n.SendTxArgs)
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}
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func (s *Service) sendTransaction(request SessionRequest, hashedPassword string) (response *SessionRequestResponse, err error) {
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if len(request.Params.Request.Params) != 1 {
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return nil, ErrorInvalidParamsCount
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}
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var params sendTransactionParams
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if err := json.Unmarshal(request.Params.Request.Params[0], ¶ms); err != nil {
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return nil, err
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}
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acc, err := s.gethManager.GetVerifiedWalletAccount(s.accountsDB, params.From.Hex(), hashedPassword)
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if err != nil {
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return nil, err
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}
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// TODO: export it as a JSON parsable type
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chainID, err := parseCaip2ChainID(request.Params.ChainID)
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if err != nil {
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return nil, err
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}
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hash, err := s.transactor.SendTransactionWithChainID(chainID, params.SendTxArgs, acc)
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if err != nil {
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return nil, err
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}
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return &SessionRequestResponse{
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SessionRequest: request,
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Signed: hash.Bytes(),
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}, nil
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}
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func (s *Service) personalSign(request SessionRequest, hashedPassword string) (response *SessionRequestResponse, err error) {
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if len(request.Params.Request.Params) != 2 {
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return nil, ErrorInvalidParamsCount
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}
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var address types.Address
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if err := json.Unmarshal(request.Params.Request.Params[1], &address); err != nil {
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return nil, err
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}
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acc, err := s.gethManager.GetVerifiedWalletAccount(s.accountsDB, address.Hex(), hashedPassword)
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if err != nil {
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return nil, err
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}
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var dBytes types.HexBytes
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if err := json.Unmarshal(request.Params.Request.Params[0], &dBytes); err != nil {
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return nil, err
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}
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hash := crypto.TextHash(dBytes)
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sig, err := crypto.Sign(hash, acc.AccountKey.PrivateKey)
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if err != nil {
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return nil, err
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}
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sig[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper
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return &SessionRequestResponse{
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SessionRequest: request,
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Signed: types.HexBytes(sig),
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}, nil
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}
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