Skip to main content

Checkpoint

Checkpoints contain finalized transactions and are used for node synchronization and global transaction ordering.

type Checkpoint {
  contentBcs: Base64
  contentDigest: String
  digest: String
  epoch: Epoch
  networkTotalTransactions: UInt53
  previousCheckpointDigest: String
  query: Query
  rollingGasSummary: GasCostSummary
  sequenceNumber: UInt53!
  summaryBcs: Base64
  timestamp: DateTime
  transactions(
    first: Int
    after: String
    last: Int
    before: String
    filter: TransactionFilter
  ): TransactionConnection
  validatorSignatures: ValidatorAggregatedSignature
}

Fields​

Checkpoint.contentBcs ● Base64 scalar​

The Base64 serialized BCS bytes of this checkpoint's contents.

Checkpoint.contentDigest ● String scalar​

A 32-byte hash that uniquely identifies the checkpoint's content, encoded in Base58.

Checkpoint.digest ● String scalar​

A 32-byte hash that uniquely identifies the checkpoint, encoded in Base58. This is a hash of the checkpoint's summary.

Checkpoint.epoch ● Epoch object​

The epoch that this checkpoint is part of.

Checkpoint.networkTotalTransactions ● UInt53 scalar​

The total number of transactions in the network by the end of this checkpoint.

Checkpoint.previousCheckpointDigest ● String scalar​

The digest of the previous checkpoint's summary.

Checkpoint.query ● Query object​

Query the RPC as if this checkpoint were the latest 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.sequenceNumber ● UInt53! non-null scalar​

The checkpoint's position in the total order of finalized checkpoints, agreed upon by consensus.

Checkpoint.summaryBcs ● Base64 scalar​

The Base64 serialized BCS bytes of this checkpoint's summary.

Checkpoint.timestamp ● DateTime 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.transactions ● TransactionConnection object​

Checkpoint.transactions.first ● Int scalar​
Checkpoint.transactions.after ● String scalar​
Checkpoint.transactions.last ● Int scalar​
Checkpoint.transactions.before ● String scalar​
Checkpoint.transactions.filter ● TransactionFilter input​

Checkpoint.validatorSignatures ● ValidatorAggregatedSignature object​

The aggregation of signatures from a quorum of validators for the checkpoint proposal.

Returned By​

checkpoint query ● multiGetCheckpoints query

Member Of​

CheckpointConnection object ● CheckpointEdge object ● TransactionEffects object