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try { let provider = new ethers.providers.JsonRpcProvider("https://bsc-testnet.publicnode.com"); const typedData = { types: { WithdrawRequest: [ {name: "signer", type: "address"}, {name: "token", type: "address"}, {name: "receiver", type: "address"}, {name: "amount", type: "uint256"}, {name: "nonce", type: "uint256"}, {name: "deadline", type: "uint256"}, ], }, primaryType: "WithdrawRequest", domain: { name: "Exchange", version: "1.0.0", chainId: 97, verifyingContract: "0x349d986890F457EB8AdCa3AbaEf7DE467B552873", }, message: { signer: "0xfB6e22aA53c0804a522Eb40fB7A0b6F7140FD7f8", token: "0x110F1586329D01b6C12F30588C6F8EECa93132f2", receiver: "0x3f777FCF79EE4D9297b26660BA2593c906525504", amount: "1000000000000000", nonce: 1, // getNonce() deadline: 1687949677246, }, }; const signer = new ethers.Wallet("bdb1ddd8b1853884fd91a0a58e466ed7b91c480b557bd7ed3f57e30139b27a48", provider); signer._signTypedData( typedData.domain, typedData.types, typedData.message ).then(res => { console.log(res) }); } catch (error) { console.log(error); }