Supported Chains

CCTP Express aims to support all chains where CCTP contracts are deployed:

Domain	Name	Waiting Time Using CCTP Express
0	Ethereum	36 seconds (3 Blocks)
1	Avalanche	20 seconds (1 Block)
2	OP (Optimism)	1 second (0 Block)
3	Arbitrum	1 second (0 Block)
4	Noble	20 seconds (1 Block)
5	Solana	4 seconds (5 Blocks)
6	Base	1 second (0 Block)
7	Polygon PoS	10 seconds (5 Blocks)

The above required block confirmation is the initial setting of the relayer run by the CCTP Express Team. However, anyone can run a relayer on CCTP Express and configure their own setting based on their risk appetite.

This initital requirement is subject to change. Ideally, a progressive mechanism that increases with the transaction amount, up to a cap, would be implemented. This approach could mitigate the reorg risk exposed to the relayer and thus minimizing the relayer fee chargeable to the end user.