Block Confirmation

A block confirmation is each additional block appended after the block that includes a transaction, deepening it and reducing the chance it is reversed.

A transaction gains one confirmation when it is included in a block and another for each block built on top of it. Because chains can briefly reorganize, deeper transactions are harder to reverse, so services set confirmation thresholds before treating a deposit as final. Bitcoin often uses six confirmations; EVM chains and finality-based networks use their own rules. Waiting balances speed against safety. Our archive RPC reports the confirmation depth of any transaction against the current chain tip, so you can enforce consistent finality policies across chains.