Method Build

protocol/builder.go:101–152

()

}

func (bb *BlockBuilder) Build() (*bc.UnsignedBlock, *state.Snapshot, error) {
	prev := bb.snapshot.Header
	refsCount := bb.MaxBlockWindow
	if prev.RefsCount < refsCount {
		refsCount = prev.RefsCount + 1
	}

	var (
		txs = make([]*bc.Tx, 0, len(bb.txs))
		wcs = make([][]byte, 0, len(bb.txs))
	)
	for _, tx := range bb.txs {
		txs = append(txs, tx.Tx)
		wcs = append(wcs, tx.WitnessCommitment)
	}

	var (
		txRoot        = bc.NewHash(merkle.Root(wcs))
		contractsRoot = bc.NewHash(bb.snapshot.ContractsTree.RootHash())
		nonceRoot     = bc.NewHash(bb.snapshot.NonceTree.RootHash())
	)

	prevID := prev.Hash()
	h := &bc.BlockHeader{
		Version:          bb.Version,
		Height:           prev.Height + 1,
		PreviousBlockId:  &prevID,
		TimestampMs:      bb.timestampMS,
		RefsCount:        refsCount,
		NextPredicate:    prev.NextPredicate,
		Runlimit:         bb.runlimit,
		TransactionsRoot: &txRoot,
		ContractsRoot:    &contractsRoot,
		NoncesRoot:       &nonceRoot,
	}
	b := &bc.UnsignedBlock{
		BlockHeader:  h,
		Transactions: txs,
	}
	err := bb.snapshot.ApplyBlockHeader(h)
	if err != nil {
		return nil, nil, err
	}

	snapshot := bb.snapshot
	bb.snapshot = nil
	bb.txs = nil
	bb.timestampMS = 0
	bb.runlimit = 0

	return b, snapshot, nil
}

// checkTransactionTime ensures that a transaction is fit
// to be included in a block generated at blockTimeMS.