Checkpoint
Checkpoints contain finalized transactions and are used for node synchronization and global transaction ordering.
type Checkpoint {
digest: String!
sequenceNumber: UInt!
timestamp: DateTime!
validatorSignatures: Base64!
previousCheckpointDigest: String
networkTotalTransactions: UInt
rollingGasSummary: GasCostSummary
epoch: Epoch
transactionBlocks(
first: Int
after: String
last: Int
before: String
filter: TransactionBlockFilter
): TransactionBlockConnection!
}
Fields
Checkpoint.digest
● String!
non-null scalar
A 32-byte hash that uniquely identifies the checkpoint contents, encoded in Base58. This hash can be used to verify checkpoint contents by checking signatures against the committee, Hashing contents to match digest, and checking that the previous checkpoint digest matches.
Checkpoint.sequenceNumber
● UInt!
non-null scalar
This checkpoint's position in the total order of finalized checkpoints, agreed upon by consensus.
Checkpoint.timestamp
● DateTime!
non-null scalar
The timestamp at which the checkpoint is agreed to have happened according to consensus. Transactions that access time in this checkpoint will observe this timestamp.
Checkpoint.validatorSignatures
● Base64!
non-null scalar
This is an aggregation of signatures from a quorum of validators for the checkpoint proposal.
Checkpoint.previousCheckpointDigest
● String
scalar
The digest of the checkpoint at the previous sequence number.
Checkpoint.networkTotalTransactions
● UInt
scalar
The total number of transaction blocks in the network by the end of this checkpoint.
Checkpoint.rollingGasSummary
● GasCostSummary
object
The computation cost, storage cost, storage rebate, and non-refundable storage fee accumulated during this epoch, up to and including this checkpoint. These values increase monotonically across checkpoints in the same epoch, and reset on epoch boundaries.
Checkpoint.epoch
● Epoch
object
The epoch this checkpoint is part of.
Checkpoint.transactionBlocks
● TransactionBlockConnection!
non-null object
Transactions in this checkpoint.
Checkpoint.transactionBlocks.first
●Int
scalar
Checkpoint.transactionBlocks.after
● String
scalar
Checkpoint.transactionBlocks.last
● Int
scalar
Checkpoint.transactionBlocks.before
● String
scalar
Checkpoint.transactionBlocks.filter
● TransactionBlockFilter
input
Returned By
checkpoint
query
Member Of
AvailableRange
object ● CheckpointConnection
object ● CheckpointEdge
object ● TransactionBlockEffects
object