Web3 Liquidity Resolution & CLOB Order Routing

Ethers.js v6 Signer Adapter

The @polymarket/clob-client SDK expects an Ethers v5 signer. A custom signature adapter bridges v6 wallet declarations without duplicating dependency weight and handles the SignatureType.POLY_PROXY execution structure for proxy wallets:

const signerAdapter: any = {
    getAddress: async () => wallet.address,
    signMessage: async (message: string | Uint8Array) => wallet.signMessage(
        typeof message === 'string' ? message : ethers.hexlify(message)
    ),
    _signTypedData: async (domain: any, types: any, value: any) => {
        const { EIP712Domain, ...restTypes } = types;
        return await wallet.signTypedData(domain, restTypes, value);
    },
    connect: () => signerAdapter
};

Execution Flow

Orders are placed as bounded limit orders using resolved contract tokens. To protect against slippage, execution limits are bounded dynamically:

$Execution Price = \min(Target Price + 0.05, 0.99)$

If POLY_PROXY_ADDRESS is specified in the environment, the client routes transactions through the proxy, verifying USDC.e on-chain balances on the Polygon network prior to order submission.