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How to parse an Ethereum address that was provided by a user with the help of zod safeParse() function?

2 Answers 2

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From zod docs:

Zod lets you provide custom validation logic via refinements.

In order to achieve this you may want first to define a zod schema by using the refine() function in combination with ethers:

const ethAddressSchema = z.string()
    .refine((value) => ethers.utils.isAddress(value), {
        message: "Provided address is invalid. Please insure you have typed correctly.",
    });

After that implement a basic validation:

const result = ethAddressSchema.safeParse("0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045");
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You can also use custom in combination with isAddress from ethers (v5, v6).

import { isAddress } from 'ethers'; // ethers v6
import { z } from 'zod';


const Address = z.custom<string>(isAddress, "Invalid Address")

// Parse a value
Address.parse("0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2");
Address.parse("abc"); // throws error

// Use in another Schema
const Token = z.object({ address: Address });
Token.parse({ address: "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2" });
Token.parse({ address: "abc" }); // throws error

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