Supported mainnets
The following mainnet networks are fully supported in production:EVM chains
SVM chains
Supported testnets
The following testnet networks are available for development and testing:EVM testnets
SVM testnets
Chain identifiers
Each chain is referenced using a standardized enum value:Chain families
Bastion groups blockchains into families based on their underlying virtual machine architecture:Supported stablecoins
Bastion provides support for the following stablecoins.On/off-ramp conversions support
Custody and crypto transfers work on every chain above. Conversions work on a subset, and the subset depends on the direction and jurisdiction.
Optimism supports custody and transfers only.
For payout countries, currencies, and rails supported for off-ramps, see Supported off-ramp payout countries.
Base assets and gas
Bastion sponsors gas by default on all supported chains. Your customers do not need to hold native tokens to send transfers; Bastion covers transaction fees automatically. Gas sponsorship is opt-out, not opt-in. If you need to disable it, contact your Bastion account team. If gas sponsorship is disabled, wallets will need to hold the chain’s native asset to cover network fees:
Base assets are not available for conversions or other value-transfer services. Bastion’s custody and conversion products are built around stablecoins.
Wallet address support
Bastion automatically generates wallet addresses for supported chain families:
Each account receives addresses for both EVM and SVM chain families, enabling multi-chain operations.
Environment behavior
Chain availability is environment-dependent:
Mainnet chains are only accessible in the production environment. Development and sandbox environments use corresponding testnets.