Note: These values are subject to change.
CCTP fast message attestation times
| Source Chain | Number of Blocks | Average Time |
|---|---|---|
| Ethereum | 2 | ~20 seconds |
| Arbitrum | 1 | ~8 seconds |
| Base | 1 | ~8 seconds |
| Codex | 1 | ~8 seconds |
| Ink | 1 | ~8 seconds |
| Linea | 1 | ~8 seconds |
| OP Mainnet | 1 | ~8 seconds |
| Plume | 1 | ~8 seconds |
| Solana | 2-3* | ~8 seconds |
| Starknet | 1 | ~8 seconds |
| Unichain | 1 | ~8 seconds |
| World Chain | 1 | ~8 seconds |
Note: Chains without Fast Message Attestation TimesSome chains don’t appear in the Fast Message Attestation Times because their
standard attestation times are already fast. Consequently, Fast Transfer is not
applicable when these chains are used as the source chain for burns. See the
CCTP supported blockchains that support Fast
Transfer as a source.
CCTP standard message attestation times
| Source Chain | Number of Blocks | Average Time |
|---|---|---|
| Ethereum | ~65* | ~13 to 19 minutes* |
| Arbitrum | ~65 ETH blocks* | ~13 to 19 minutes* |
| Arc Testnet | 1 | ~0.5 seconds |
| Avalanche | 1 | ~8 seconds |
| Base | ~65 ETH blocks* | ~13 to 19 minutes* |
| BNB Smart Chain | 3 | ~2 seconds |
| Codex | ~65 ETH blocks* | ~13 to 19 minutes* |
| HyperEVM | 1 | ~5 seconds |
| Ink | ~65 ETH blocks* | ~30 minutes* |
| Linea | 1 | ~6 to 32 hours** |
| Monad | 1 | ~5 seconds |
| OP Mainnet | ~65 ETH blocks* | ~13 to 19 minutes* |
| Plume | ~65 ETH blocks* | ~13 to 19 minutes* |
| Polygon PoS | ~2-3 | ~8 seconds |
| Sei | 1 | ~5 seconds |
| Solana | 32 | ~25 seconds |
| Starknet | ~65 ETH Blocks* | ~4 to 8 hours*** |
| Sonic | 1 | ~8 seconds |
| Unichain | ~65 ETH blocks* | ~13 to 19 minutes* |
| World Chain | ~65 ETH blocks* | ~13 to 19 minutes* |
| XDC | 3 | ~10 seconds |
Block confirmations for L2s to Ethereum (*)Layer 2 (L2) blockchains publish transaction data in batches to Ethereum L1, and
the frequency of these posts varies by chain. Most OP Stack-based chains,
including Codex, post state updates using EIP-4844 blob transactions
approximately every ~15 minutes. After a batch is posted, Circle waits for the
Ethereum L1 block containing the batch to finalize, which typically happens
after ~65 blocks (13 to 19 minutes), before issuing an attestation.Hard finality for Linea (**)The typical time before hard finality on Linea is 6-32 hours.Hard finality for Starknet (***)The typical time before hard finality on Starknet is 4–8 hours, as finality
depends on when the zk-rollup proof is posted to Ethereum and the subsequent L1
confirmations.Finality for SolanaFor Solana Standard Messages, Circle waits for block finality before attesting.
This takes 32 blocks. For Fast Messages, Circle only waits for the block to be
confirmed, meaning the block has received votes from validators representing
over two-thirds of the total stake. This typically takes 2-3 blocks.