Method produceBlock

blockproducer/branch.go:183–233

(
	h uint32, ts time.Time, addr proto.AccountAddress, signer *ca.PrivateKey,
)

}

func (b *branch) produceBlock(
	h uint32, ts time.Time, addr proto.AccountAddress, signer *ca.PrivateKey,
) (
	br *branch, bl *types.BPBlock, err error,
) {
	var (
		cpy       = b.makeArena()
		txs       = cpy.sortUnpackedTxs()
		ierr      error
		packCount = conf.MaxTransactionsPerBlock
	)

	if len(txs) < packCount {
		packCount = len(txs)
	}

	out := make([]pi.Transaction, 0, packCount)
	for _, v := range txs {
		var k = v.Hash()
		if ierr = cpy.preview.apply(v, h); ierr != nil {
			continue
		}
		delete(cpy.unpacked, k)
		cpy.packed[k] = v
		out = append(out, v)
		if len(out) == packCount {
			break
		}
	}

	// Create new block and update head
	var block = &types.BPBlock{
		SignedHeader: types.BPSignedHeader{
			BPHeader: types.BPHeader{
				Version:    0x01000000,
				Producer:   addr,
				ParentHash: cpy.head.hash,
				Timestamp:  ts,
			},
		},
		Transactions: out,
	}
	if ierr = block.PackAndSignBlock(signer); ierr != nil {
		err = errors.Wrap(ierr, "failed to sign block")
		return
	}
	cpy.head = newBlockNode(h, block, cpy.head)
	br = cpy
	bl = block
	return
}

func (b *branch) clearPackedTxs(txs []pi.Transaction) {
	for _, v := range txs {