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accounts/external: convert signature v value to 0/1 (#20997)

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This fixes an issue with clef, which already transforms the signature
to use the legacy 27/28 encoding.

Fixes #20994
This commit is contained in:
Martin Holst Swende
2020-05-01 13:52:41 +02:00
committed by GitHub
parent c43be6cf87
commit 510b6f90db
2 changed files with 10 additions and 3 deletions
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11
accounts/external/backend.go vendored
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@ -175,15 +175,20 @@ func (api *ExternalSigner) SignData(account accounts.Account, mimeType string, d
}
func (api *ExternalSigner) SignText(account accounts.Account, text []byte) ([]byte, error) {
var res hexutil.Bytes
var signature hexutil.Bytes
var signAddress = common.NewMixedcaseAddress(account.Address)
if err := api.client.Call(&res, "account_signData",
if err := api.client.Call(&signature, "account_signData",
accounts.MimetypeTextPlain,
&signAddress, // Need to use the pointer here, because of how MarshalJSON is defined
hexutil.Encode(text)); err != nil {
return nil, err
}
return res, nil
if signature[64] == 27 || signature[64] == 28 {
// If clef is used as a backend, it may already have transformed
// the signature to ethereum-type signature.
signature[64] -= 27 // Transform V from Ethereum-legacy to 0/1
}
return signature, nil
}
func (api *ExternalSigner) SignTx(account accounts.Account, tx *types.Transaction, chainID *big.Int) (*types.Transaction, error) {