Full lifecycle view
Gateway_FinalizeBlock
Block timestamp → commit, incl. the gateway-build-block call for block #15977
Measured from on-chain timestamps only: the EVM block timestamp, which the producer chose when it planned the block (whole seconds), and the record time (commit) of the Gateway_FinalizeBlock transaction; a commit that reads slightly before the block timestamp (rounding) shows as 0. The gateway-build-block external call runs inside that transaction and is not timed on its own; the import into the execution layers follows the commit and its time is not observable here, so those steps are markers without a duration.
Total
639ms
Block → Canton commit
639ms
block timestamp → record time (±1s)
Measured from on-chain timestamps: the EVM block timestamp, chosen when the producer planned the block, and the record time (commit) of the Gateway_FinalizeBlock transaction. The block timestamp is whole seconds and follows Canton's ledger time, so the span carries up to ±1s of rounding; a commit that reads slightly before the block timestamp shows as 0.
0xf86e028518e94ac0b882520894235dc887c81c87cfa6d8a743aa93ace7c51b3c8c87038d7ea4c6800080831c946ea007ed8afe6c6ddfd76e3b1bf2ec66da6e619228c20c0fb52c8b87526016a9771ca04f5f5d92e9fc63496f6d22bed74c1e2a5323d06e34e6f317c3c8b15b3e1c0ad4