Supported blockchains
xReserve operates across multiple blockchains. Each supported blockchain serves
one or more of the following roles:
- Source chains where Circle-deployed xReserve smart contracts hold
USDC reserves.
- Remote chains where USDC-backed tokens are issued.
- Destination chains where USDC or USDC-backed tokens are ultimately
withdrawn.
Source chains
The following tables list the mainnet and testnet blockchains where xReserve
smart contracts have been deployed. Users deposit USDC into these contracts to
receive an equal amount of USDC-backed tokens on remote blockchains.
Tip: You can transfer USDC from other blockchains to a source blockchain
before making xReserve deposits.
Remote chains
Note: Remote chains will be added as USDC-backed tokens are launched on
xReserve partner blockchains.
Destination chains
These are the destination blockchains where USDC or USDC-backed tokens are
ultimately withdrawn:
- Gateway supported blockchains:
Because xReserve holds USDC in Gateway wallets, users can withdraw USDC on any
Gateway supported blockchain, including the source chain.
- CCTP supported blockchains: If a
blockchain is not supported by Gateway, xReserve uses CCTP to forward the
funds to another blockchain. This lets users withdraw USDC on any CCTP
supported blockchain.
- Another remote blockchain: Users can burn USDC-backed tokens
on one remote blockchain to withdraw USDC-backed tokens on a different remote
blockchain.
Supported domains
A domain is a Circle-issued numeric identifier for a blockchain. xReserve uses
domains in messages and attestations. Domains don’t map to any existing public
chain ID.
xReserve domains fall into two categories:
- Native domains are the blockchain on which USDC is held in an xReserve
contract.
- Remote domains are the blockchain on which the USDC-backed token is
deployed, minted, and circulated.
Native domains
Remote domains
Note: Remote chains will be added as USDC-backed tokens are launched on
xReserve partner blockchains.
