Gateway supported blockchains

List of blockchains that Gateway supports

Gateway supports a subset of blockchains where USDC is natively issued. The following sections show the chains that Gateway supports.

Circle identifies each blockchain by a numeric domain identifier. These domain identifiers are not tied to any existing public chain ID. Gateway uses the same domain identifiers as CCTP.

Testnet

Blockchain	Domain	Nanopayments	SupportedChainName
Arc Testnet	26	Yes	arcTestnet
Arbitrum Sepolia	3	Yes	arbitrumSepolia
Avalanche Fuji	1	Yes	avalancheFuji
Base Sepolia	6	Yes	baseSepolia
Ethereum Sepolia	0	Yes	sepolia
HyperEVM Testnet	19	Yes	hyperEvmTestnet
OP Sepolia	2	Yes	optimismSepolia
Polygon Amoy	7	Yes	polygonAmoy
Sei Atlantic	16	Yes	seiAtlantic
Solana Devnet	5	No
Sonic Testnet	13	Yes	sonicTestnet
Unichain Sepolia	10	Yes	unichainSepolia
World Chain Sepolia	14	Yes	worldChainSepolia

Mainnet

Blockchain	Domain	Nanopayments
Arbitrum	3	Yes
Arc	26	Yes
Avalanche	1	Yes
Base	6	Yes
Ethereum	0	Yes
HyperEVM	19	Yes
OP	2	Yes
Polygon PoS	7	Yes
Sei	16	Yes
Solana	5	No
Sonic	13	Yes
Unichain	10	Yes
World Chain	14	Yes

Required block confirmations

Before updating the unified USDC balance or issuing attestations, the Gateway API waits for a specific number of block confirmations so that the deposit transaction is unlikely to be reverted.

The following table shows the number of block confirmations and the average time to attestation for each supported chain. The average time to attestation is the time it takes for a transaction to be included in a block and confirmed by the network.

Blockchain	Number of blocks	Average time
Arbitrum	~65 ETH blocks	~13 to 19 minutes
Arc	~1	~0.5 seconds
Avalanche	1	~8 seconds
Base	~65 ETH blocks	~13 to 19 minutes
Ethereum	~65	~13 to 19 minutes
HyperEVM	~1	~5 seconds
OP	~65 ETH blocks	~13 to 19 minutes
Polygon PoS	~2-3	~8 seconds
Sei	~1	~5 seconds
Solana	~2-3	~8 seconds
Sonic	~1	~8 seconds
Unichain	~65 ETH blocks	~13 to 19 minutes
World Chain	~65 ETH blocks	~13 to 19 minutes

Fast deposits

Some deposit times may be too long for certain use cases. Third parties may offer alternative methods for depositing funds into Gateway with faster deposit times. For example, Eco offers a Gateway deposit service. Circle does not endorse, maintain, or audit Eco or any other similar third-party service. Use of any such third-party service involves risks, and you are solely responsible for conducting your own diligence and reviewing the applicable terms and conditions before using such service. This guide is provided solely for informational purposes and may become outdated.