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Algorand Specifications

Description:

Specifies the maximum number of consecutive attempts to Fast Catchup after which peer connections are replaced.

Description:

Is the maximum number of blocks that the Fast Catchup will fetch in parallel. If less than Protocol.SeedLookback, then Protocol.SeedLookback will be used to limit the catchup. Setting this to 0 would disable the catchup.

Description:

Defines how often a Catchpoint is generated, measured in rounds. These Ledger snapshots allow nodes to sync quickly by downloading and verifying the Ledger state at a specific round instead of replaying all transactions. Setting this to 0 disables the Catchpoints from being generated.

Description:

Defines how many Catchpoint Files to store. A value of 0 means don’t store any, -1 means unlimited; a positive number suggests the maximum number of most recent Catchpoint Files to store.

Description:

Sets the maximum time (in seconds) that a node will wait for an HTTP response when requesting a block from a Relay Node during Fast Catchup. If the request takes longer than this timeout, the node abandons the request and tries with another Relay Node.

Description:

Controls how long the gossip query for fetching a block from a Relay Node would take before giving up and trying another Relay Node.

Description:

Controls the number of attempts the Ledger fetcher would perform before giving up the Fast Catchup to the provided Catchpoint.

Description:

Controls the number of attempts the Block fetcher would perform before giving up on a provided Catchpoint.

Description:

Determines if Catchpoints are going to be tracked. The value is interpreted as follows:

• -1: Do not track Catchpoints.
• 1: Track Catchpoints as long as CatchpointInterval > 0.
• 2: Track Catchpoints and always generate Catchpoint Files as long as CatchpointInterval > 0.
• 0: Automatic (default). In this mode, a Non-Archival node would not track the Catchpoints, while an Archival node would track the Catchpoints as long as CatchpointInterval > 0.
• Any other values of this field would behave as if the default value was provided.

Description:

Defines the maximum duration for which a client will keep the outgoing connection of a Catchpoint download request open for processing before shutting it down. In Networks with large Catchpoint files, slow connections, or slow storage could be a good reason to increase this value.

This is a client-side only configuration value, and it’s independent of the actual Catchpoint file size.

Description:

Defines the minimal download speed that would be considered to be "acceptable" by the Catchpoint file fetcher, measured in bytes per second. The connection would be recycled if the provided stream speed drops below this threshold. If this field is 0, the default value would be used instead.

The download speed is evaluated per Catchpoint “chunk”.

Description:

A configuration used by the Fast Catchup service. It can be used to omit certain validations to speed up the synchronization process, or to apply extra validations. The value is a bitmask (where bit 0 is the LSB and bit 3 is the MSB).

The value of each bit is interpreted as follows:

• bit 0:
  • 0: Verify the block certificate.
  • 1: Skip this validation.
• bit 1:
  • 0: Verify payset committed hash in block header matches payset hash.
  • 1: Skip this validation.
• bit 2:
  • 0: Skip verifying the transaction signatures on the block are valid.
  • 1: Verify transaction signatures in the block.
• bit 3:
  • 0: Skip verifying that the recomputed payset hash matches the payset committed hash in the block header.
  • 1: Perform verification as described above.

Not all permutations of the above bitmask are currently functional. In particular, the functional ones are:

• 0000: Default behavior, perform standard validations and skip extra validations.
• 0011: Speed up synchronization, skip standard and extra validations.
• 1100: Pedantic, perform standard and extra validations.