Function NewInitialBlock

protocol/block.go:139–169

NewInitialBlock produces the first block for a new blockchain, using the given pubkeys and quorum for its NextPredicate.

(pubkeys []ed25519.PublicKey, quorum int, timestamp time.Time)

// NewInitialBlock produces the first block for a new blockchain,
// using the given pubkeys and quorum for its NextPredicate.
func NewInitialBlock(pubkeys []ed25519.PublicKey, quorum int, timestamp time.Time) (*bc.Block, error) {
	// TODO(kr): move this into a lower-level package (e.g. chain/protocol/bc)
	// so that other packages (e.g. chain/protocol/validation) unit tests can
	// call this function.
	root := bc.TxMerkleRoot(nil) // calculate the zero value of the tx merkle root
	patRoot := bc.NewHash(new(patricia.Tree).RootHash())

	var pkBytes [][]byte
	for _, pk := range pubkeys {
		pkBytes = append(pkBytes, pk)
	}

	b := &bc.Block{
		UnsignedBlock: &bc.UnsignedBlock{
			BlockHeader: &bc.BlockHeader{
				Version:          3,
				Height:           1,
				TimestampMs:      bc.Millis(timestamp),
				TransactionsRoot: &root,
				ContractsRoot:    &patRoot,
				NoncesRoot:       &patRoot,
				NextPredicate: &bc.Predicate{
					Version: 1,
					Quorum:  int32(quorum),
					Pubkeys: pkBytes,
				},
			},
		},
	}
	return b, nil
}