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CheckpointContentsV1Protocol

CheckpointContentsV1Protocol Objects​

class CheckpointContentsV1Protocol(typing.Protocol)

CheckpointContents are the transactions included in an upcoming checkpoint. They must have already been causally ordered. Since the causal order algorithm is the same among validators, we expect all honest validators to come up with the same order for each checkpoint content.

BCS

The BCS serialized form for this type is defined by the following ABNF:

checkpoint-contents-v1 = (vector execution-digests)      ; transaction and effect digests
(vector (vector user-signature)) ; set of user signatures for each
; transaction. MUST be the same
; length as the vector of digests

execution-digests = transaction-digest transaction-effects-digest   ; transaction, effects

is_empty​

def is_empty() -> bool

Whether this checkpoint has no transactions.

len​

def len() -> int

The number of transactions in this checkpoint.