> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lead.bank/llms.txt
> Use this file to discover all available pages before exploring further.

# Blockchain payments timing and availability

> When blockchain payments are available and how many confirmations each chain needs

Understand when blockchain payments can be processed.

## Availability

Blockchain payments are available 24/7/365, for both sending and receiving.

## Blockchain confirmations

Lead waits for a set number of block confirmations before it recognizes a payment on-chain. The most recent block can be replaced by a different block, called a reorg, and the transaction is then reversed. Each new block added after the block that includes the transaction makes a reversal less likely. The number of confirmations depends on the chain.

| Chain | Confirmations | Approximate time |
| :- | :- | :- |
| SOLANA | 1 Block | \~400 milliseconds |
| ETHEREUM | 12 Blocks | \~3 minutes |
| BASE | 12 Ethereum Blocks | \~3 to 9 minutes |
| OPTIMISM | 12 Ethereum Blocks | \~3 to 9 minutes |
| ARBITRUM | 12 Ethereum Blocks | \~3 to 9 minutes |