feat: add ADI Chain (chain ID 36900) support with USDC.e#2279
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Add ADI Chain (chain ID 36900) to all three SDK registries with USDC.e as the default stablecoin. USDC.e at 0x9cb8142aEBBcdc60AF7c97Af897A67A8f3CA71C2 supports EIP-3009 transferWithAuthorization with EIP-712 domain name="USDC.e", version="2", 6 decimals.
- Add ADI Testnet (chain ID 99999) with DDSC as default asset (Permit2) - Add DDSC as a supported fallback asset alongside USDC.e on ADI Chain - Add SupportedAssets field to Go NetworkConfig and supported_assets to Python NetworkConfig TypedDict for multi-asset support - Add supportedAssets field to TypeScript ExactDefaultAssetInfo type DDSC (0x1211f0cf...) uses Permit2 transfer method: - No EIP-3009 support (transferWithAuthorization not available) - No EIP-2612 support (no permit() function) - Requires standard ERC-20 approval flow before Permit2 transactions ADI Chain: eip155:36900 | USDC.e (EIP-3009) + DDSC (Permit2) ADI Testnet: eip155:99999 | DDSC (Permit2)
Verified on-chain: neither USDC.e (0x9cb814...) nor DDSC (0x1211f0cf...) contracts are deployed on ADI Testnet (chain ID 99999). Both return empty bytecode (0x). Removing testnet entry until stablecoins are deployed.
…SDC.e - Revert SupportedAssets field from Go NetworkConfig struct - Revert supported_assets field from Python NetworkConfig TypedDict - Revert supportedAssets field from TypeScript ExactDefaultAssetInfo type - Remove DDSC as supported fallback on ADI Chain mainnet - Add ADI Testnet (eip155:99999) with USDC.e as default asset ADI Testnet USDC.e verified via Chainlink CCIP directory: - Address: 0x0C189aa5cE517aE3Ce24015F042D405141011634 - name: USDC.e, decimals: 6, version: 1 - No EIP-3009, no EIP-2612 -> uses Permit2
Verified via bytecode inspection: 0x4f1ef286 (transferWithAuthorization) is present in the testnet USDC.e contract at 0x0C189aa5...011634. The contract is a custom implementation (not a proxy) with EIP-3009 built directly in. Does not support EIP-2612 or EIP-712 domainSeparator.
The Chainlink CCIP directory lists a 'USDC.e' on ADI testnet but it's a skeleton proxy with no ERC-20 implementation — just EIP-3009 and decimals hardcoded. Not usable for actual payments. Neither Circle nor Chainlink officially supports USDC on ADI testnet.
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Add ADI Chain (CAIP-2 eip155:36900, chain ID 36900) as a default EVM chain across all three SDKs (TypeScript, Go, Python).
Default stablecoin: USDC.e at 0x9cb8142aEBBcdc60AF7c97Af897A67A8f3CA71C2, 6 decimals, EIP-3009 supported.
Rationale
ADI Chain is an EVM L2 secured by Ethereum with Chainlink CCIP as its canonical cross-chain bridge. USDC.e is deployed on mainnet with full EIP-3009 and EIP-2612 support, making it ideal for x402 payments.
Changes
Verification
All token parameters (address, name, version, decimals, EIP-3009 support) were verified on-chain via ADI Explorer (explorer.adifoundation.ai) and RPC calls to rpc.adifoundation.ai.