List Chains

List all available blockchain chains and their networks.

Returns all blockchains supported by Gateway with their available networks. Use this to discover which chains are configured for DEX trading.

Supported Chains: - solana: Solana blockchain (networks: mainnet-beta, devnet) - ethereum: Ethereum mainnet and testnets - polygon: Polygon PoS (networks: mainnet, mumbai) - arbitrum: Arbitrum L2 (networks: mainnet, goerli)