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# Verify Message \[verifyMessage]

Verifies that a message was signed by the provided address, supporting Smart Contract Accounts (ERC-1271/6492/8010) and Externally Owned Accounts.

Computes the [EIP-191](https://eips.ethereum.org/EIPS/eip-191) personal-message hash and delegates to [`verifyHash`](/docs/actions/public/verifyHash), which also accepts all of its options ([`mode`](/docs/actions/public/verifyHash#mode), [`factory`](/docs/actions/public/verifyHash#factory), block selectors, and verifier overrides).

## Usage

This example verifies that a message was signed by the provided address, supporting Smart Contract Accounts (ERC-1271/6492/8010) and Externally Owned Accounts.

:::code-group
```ts twoslash [example.ts]
import { client } from './viem.config'

const valid = await client.verifyMessage({
  address: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
  message: 'hello world',
  signature: '0x…',
})
// @log: true
```

```ts twoslash [viem.config.ts] filename="viem.config.ts"
import { Client, http, publicActions } from 'viem'
import { mainnet } from 'viem/chains'

export const client = Client.create({
  chain: mainnet,
  transport: http(),
}).extend(publicActions())
```
:::

### Standalone Action

Call `Actions.verifyMessage` directly by passing the Client as the first argument.

:::code-group
```ts twoslash [example.ts]
import { Actions } from 'viem'
import { client } from './viem.config'

const valid = await Actions.verifyMessage(client, {
  address: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
  message: 'hello world',
  signature: '0x…',
})
// @log: true
```

```ts twoslash [viem.config.ts] filename="viem.config.ts"
import { Client, http } from 'viem'
import { mainnet } from 'viem/chains'

export const client = Client.create({
  chain: mainnet,
  transport: http(),
})
```
:::

## Return Value

`boolean`

Whether the signature is valid for the given message and address.

## Parameters

Accepts every [`verifyHash` parameter](/docs/actions/public/verifyHash#parameters) except `hash`,
plus:

### message

* **Type:** `string | { raw: Hex | Bytes }`

The message that was signed. Use the `raw` form for pre-encoded data.

```ts twoslash
import { Actions, Client, http } from 'viem'
import { mainnet } from 'viem/chains'

const client = Client.create({ chain: mainnet, transport: http() })
// ---cut---
const valid = await Actions.verifyMessage(client, {
  address: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
  message: { raw: '0x68656c6c6f20776f726c64' }, // [!code focus]
  signature: '0x…',
})
```

## Errors

| Error | Description |
| --- | --- |
| `RpcError.ExecutionError` | The verification request failed for a reason other than an invalid signature (invalid signatures resolve to `false`). |