let returnType: {
domain: {
readonly chainId: 10;
readonly name: "Farcaster SignedKeyRequestValidator";
readonly verifyingContract: "0x00000000FC700472606ED4fA22623Acf62c60553";
readonly version: "1";
};
primaryType: "SignedKeyRequest";
types: {
readonly SignedKeyRequest: Array<{ name: string; type: string }>;
};
};