Fixed the eth_signTypedData_v4 example - correct use of from and im…

[evshank]

Description

The example using eth_signTypedData_v4 contained errors:

from was returned as an array (web3.eth.getAccounts()), but was used as an address string.

The sigUtil and ethUtil imports were missing, which caused calls to recoverTypedSignature_v4 and toChecksumAddress to fail.

The alert messages and signature verification used an array instead of a single address.

What has been fixed:

The correct imports have been added: import * as sigUtil from “@metamask/eth-sig-util” and import * as ethUtil from “ethereumjs-util”.

from = accounts[0] is used to pass a single address to RPC and for signature verification.

The check ethUtil.toChecksumAddress(recovered) === ethUtil.toChecksumAddress(from) is now correct.

Alert messages display a single address instead of an array.

After these changes, the example is fully functional and complies with the recommended use of EIP-712 signatures with MetaMask.

Issue(s) fixed

Fixes #

Preview

Checklist

• If this PR updates or adds documentation content that changes or adds technical meaning, it has received an approval from an engineer or DevRel from the relevant team.
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Note

Low Risk
Low risk documentation-only change that corrects sample code imports and address handling; no production logic affected.

Overview
Updates the eth_signTypedData_v4 guide example to be runnable by adding missing @metamask/eth-sig-util and ethereumjs-util imports.

Fixes account handling by selecting from = accounts[0] (instead of treating the full accounts array as an address) and uses that single address consistently for RPC params, checksum comparison, and error messaging during signature recovery/verification.

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