84 lines
2.0 KiB
Go
84 lines
2.0 KiB
Go
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package consensus
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import (
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"context"
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"errors"
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blockadt "github.com/filecoin-project/specs-actors/actors/util/adt"
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"github.com/ipfs/go-cid"
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cbg "github.com/whyrusleeping/cbor-gen"
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"go.opencensus.io/trace"
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"golang.org/x/xerrors"
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ffi "github.com/filecoin-project/filecoin-ffi"
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"github.com/filecoin-project/go-state-types/crypto"
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)
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var ErrTemporal = errors.New("temporal error")
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func VerifyBlsAggregate(ctx context.Context, sig *crypto.Signature, msgs []cid.Cid, pubks [][]byte) error {
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_, span := trace.StartSpan(ctx, "syncer.VerifyBlsAggregate")
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defer span.End()
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span.AddAttributes(
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trace.Int64Attribute("msgCount", int64(len(msgs))),
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)
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msgsS := make([]ffi.Message, len(msgs))
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pubksS := make([]ffi.PublicKey, len(msgs))
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for i := 0; i < len(msgs); i++ {
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msgsS[i] = msgs[i].Bytes()
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copy(pubksS[i][:], pubks[i][:ffi.PublicKeyBytes])
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}
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sigS := new(ffi.Signature)
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copy(sigS[:], sig.Data[:ffi.SignatureBytes])
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if len(msgs) == 0 {
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return nil
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}
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valid := ffi.HashVerify(sigS, msgsS, pubksS)
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if !valid {
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return xerrors.New("bls aggregate signature failed to verify")
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}
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return nil
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}
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func AggregateSignatures(sigs []crypto.Signature) (*crypto.Signature, error) {
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sigsS := make([]ffi.Signature, len(sigs))
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for i := 0; i < len(sigs); i++ {
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copy(sigsS[i][:], sigs[i].Data[:ffi.SignatureBytes])
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}
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aggSig := ffi.Aggregate(sigsS)
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if aggSig == nil {
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if len(sigs) > 0 {
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return nil, xerrors.Errorf("bls.Aggregate returned nil with %d signatures", len(sigs))
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}
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zeroSig := ffi.CreateZeroSignature()
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// Note: for blst this condition should not happen - nil should not
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// be returned
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return &crypto.Signature{
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Type: crypto.SigTypeBLS,
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Data: zeroSig[:],
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}, nil
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}
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return &crypto.Signature{
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Type: crypto.SigTypeBLS,
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Data: aggSig[:],
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}, nil
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}
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func ToMessagesArray(store blockadt.Store, cids []cid.Cid) (cid.Cid, error) {
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arr := blockadt.MakeEmptyArray(store)
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for i, c := range cids {
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oc := cbg.CborCid(c)
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if err := arr.Set(uint64(i), &oc); err != nil {
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return cid.Undef, err
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}
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}
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return arr.Root()
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}
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