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core/types: improve authority signature handling

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Felix Lange 2024-12-02 12:57:58 +01:00 committed by lightclient
parent e137c473f0
commit bb182a6429
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GPG key ID: 75C916AFEE20183E
1 changed files with 14 additions and 20 deletions
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34
core/types/tx_setcode.go
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@ -68,8 +68,7 @@ type SetCodeTx struct {
//go:generate go run github.com/fjl/gencodec -type Authorization -field-override authorizationMarshaling -out gen_authorization.go
// Authorization is an authorization from an account to deploy code at it's
// address.
// Authorization is an authorization from an account to deploy code at its address.
type Authorization struct {
ChainID uint64 `json:"chainId" gencodec:"required"`
Address common.Address `json:"address" gencodec:"required"`
@ -88,15 +87,8 @@ type authorizationMarshaling struct {
// SignAuth signs the provided authorization.
func SignAuth(auth Authorization, prv *ecdsa.PrivateKey) (Authorization, error) {
h := prefixedRlpHash(
0x05,
[]interface{}{
auth.ChainID,
auth.Address,
auth.Nonce,
})
sig, err := crypto.Sign(h[:], prv)
sighash := auth.sigHash()
sig, err := crypto.Sign(sighash[:], prv)
if err != nil {
return Authorization{}, err
}
@ -117,22 +109,24 @@ func (a *Authorization) withSignature(sig []byte) Authorization {
}
}
func (a *Authorization) sigHash() common.Hash {
return prefixedRlpHash(0x05, []any{
a.ChainID,
a.Address,
a.Nonce,
})
}
// Authority recovers the the authorizing account of an authorization.
func (a *Authorization) Authority() (common.Address, error) {
sighash := prefixedRlpHash(
0x05,
[]interface{}{
a.ChainID,
a.Address,
a.Nonce,
})
sighash := a.sigHash()
if !crypto.ValidateSignatureValues(a.V, a.R.ToBig(), a.S.ToBig(), true) {
return common.Address{}, ErrInvalidSig
}
// encode the signature in uncompressed format
var sig [crypto.SignatureLength]byte
a.R.SetBytes32(sig[:32])
a.R.SetBytes32(sig[32:64])
a.R.WriteToSlice(sig[:32])
a.S.WriteToSlice(sig[32:64])
sig[64] = a.V
// recover the public key from the signature
pub, err := crypto.Ecrecover(sighash[:], sig[:])