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42 lines
1.2 KiB
42 lines
1.2 KiB
5 years ago
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package chain
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import (
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"errors"
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"github.com/harmony-one/bls/ffi/go/bls"
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bls2 "github.com/harmony-one/harmony/crypto/bls"
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"github.com/harmony-one/harmony/internal/utils"
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)
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// ReadSignatureBitmapByPublicKeys read the payload of signature and bitmap based on public keys
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func ReadSignatureBitmapByPublicKeys(recvPayload []byte, publicKeys []*bls.PublicKey) (*bls.Sign, *bls2.Mask, error) {
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if len(recvPayload) < 96 {
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return nil, nil, errors.New("payload not have enough length")
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}
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payload := append(recvPayload[:0:0], recvPayload...)
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//#### Read payload data
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// 96 byte of multi-sig
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offset := 0
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multiSig := payload[offset : offset+96]
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offset += 96
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// bitmap
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bitmap := payload[offset:]
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//#### END Read payload data
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aggSig := bls.Sign{}
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err := aggSig.Deserialize(multiSig)
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if err != nil {
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return nil, nil, errors.New("unable to deserialize multi-signature from payload")
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}
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mask, err := bls2.NewMask(publicKeys, nil)
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if err != nil {
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utils.Logger().Warn().Err(err).Msg("onNewView unable to setup mask for prepared message")
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return nil, nil, errors.New("unable to setup mask from payload")
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}
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if err := mask.SetMask(bitmap); err != nil {
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utils.Logger().Warn().Err(err).Msg("mask.SetMask failed")
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}
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return &aggSig, mask, nil
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}
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