Function createAuthenticatedClient

src/lib/polymarketCLOB.ts:115–145

(
  creds: L2Creds,
  proxyAddress: string,
  signerAddress: string
)

 * proxyAddress: the Polymarket proxy wallet address (used as POLY_ADDRESS header).
 */
export function createAuthenticatedClient(
  creds: L2Creds,
  proxyAddress: string,
  signerAddress: string
): ClobClient {
  // POLY_ADDRESS in L2 HMAC headers must match the address used to derive the API key (EOA).
  // proxyAddress goes only as funderAddress (6th param) so orders use proxy as maker.
  const stub = {
    address: signerAddress,
    getAddress: async () => signerAddress,
    _signTypedData: async () => { throw new Error("L1 sign not available"); },
  };
  return new ClobClient(
    CLOB_HOST,
    CHAIN_ID,
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    stub as any,
    {
      key: creds.apiKey,
      secret: creds.secret,
      passphrase: creds.passphrase,
    },
    signerAddress.toLowerCase() === proxyAddress.toLowerCase()
      ? SignatureType.EOA
      : SignatureType.POLY_GNOSIS_SAFE,
    proxyAddress,  // funderAddress: order maker = proxy wallet
    undefined,
    false,
    getBuilderConfig(),
  );
}

/**
 * Cancel an open order.