Skip to content

OPB-02: Raise error on oversized chain id #3620

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
mergify merged 2 commits into from
Oct 4, 2022
Merged

OPB-02: Raise error on oversized chain id #3620

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
80b79bb
op-node: Return error on big chain id
maurelian Sep 29, 2022
b115db2
Merge branch 'develop' into op-node/fillbytes-size-checks
mergify[bot] Oct 3, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 5 additions & 1 deletion op-node/p2p/gossip.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -224,7 +224,11 @@ func BuildBlocksValidator(log log.Logger, cfg *rollup.Config) pubsub.ValidatorEx
signatureBytes, payloadBytes := data[:65], data[65:]

// [REJECT] if the signature by the sequencer is not valid
signingHash := BlockSigningHash(cfg, payloadBytes)
signingHash, err := BlockSigningHash(cfg, payloadBytes)
if err != nil {
log.Warn("failed to compute block signing hash", "err", err, "peer", id)
return pubsub.ValidationReject
}

pub, err := crypto.SigToPub(signingHash[:], signatureBytes)
if err != nil {
Expand Down
14 changes: 10 additions & 4 deletions op-node/p2p/signer.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -23,19 +23,22 @@ type Signer interface {
io.Closer
}

func SigningHash(domain [32]byte, chainID *big.Int, payloadBytes []byte) common.Hash {
func SigningHash(domain [32]byte, chainID *big.Int, payloadBytes []byte) (common.Hash, error) {
var msgInput [32 + 32 + 32]byte
// domain: first 32 bytes
copy(msgInput[:32], domain[:])
// chain_id: second 32 bytes
if chainID.BitLen() > 256 {
return common.Hash{}, errors.New("chain_id is too large")
}
chainID.FillBytes(msgInput[32:64])
// payload_hash: third 32 bytes, hash of encoded payload
copy(msgInput[32:], crypto.Keccak256(payloadBytes))

return crypto.Keccak256Hash(msgInput[:])
return crypto.Keccak256Hash(msgInput[:]), nil
}

func BlockSigningHash(cfg *rollup.Config, payloadBytes []byte) common.Hash {
func BlockSigningHash(cfg *rollup.Config, payloadBytes []byte) (common.Hash, error) {
return SigningHash(SigningDomainBlocksV1, cfg.L2ChainID, payloadBytes)
}

Expand All @@ -52,7 +55,10 @@ func (s *LocalSigner) Sign(ctx context.Context, domain [32]byte, chainID *big.In
if s.priv == nil {
return nil, errors.New("signer is closed")
}
signingHash := SigningHash(domain, chainID, encodedMsg)
signingHash, err := SigningHash(domain, chainID, encodedMsg)
if err != nil {
return nil, err
}
signature, err := crypto.Sign(signingHash[:], s.priv)
if err != nil {
return nil, err
Expand Down