# channel_verify
[[Source]<br>](https://github.com/ripple/rippled/blob/d4a56f223a3b80f64ff70b4e90ab6792806929ca/src/ripple/rpc/handlers/PayChanClaim.cpp#L89 "Source")

_(Requires the [PayChan amendment](known-amendments.html#paychan) to be enabled. [New in: rippled 0.33.0][])_

The `channel_verify` method checks the validity of a signature that can be used to redeem a specific amount of XRP from a payment channel.

## Request Format
An example of the request format:

<!-- MULTICODE_BLOCK_START -->

*WebSocket*

```
{
    "id": 1,
    "command": "channel_verify",
    "channel_id": "5DB01B7FFED6B67E6B0414DED11E051D2EE2B7619CE0EAA6286D67A3A4D5BDB3",
    "signature": "304402204EF0AFB78AC23ED1C472E74F4299C0C21F1B21D07EFC0A3838A420F76D783A400220154FB11B6F54320666E4C36CA7F686C16A3A0456800BBC43746F34AF50290064",
    "public_key": "aB44YfzW24VDEJQ2UuLPV2PvqcPCSoLnL7y5M1EzhdW4LnK5xMS3",
    "amount": "1000000"
}
```

*JSON-RPC*

```
POST http://localhost:5005/
Content-Type: application/json

{
    "method": "channel_verify",
    "params": [{
        "channel_id": "5DB01B7FFED6B67E6B0414DED11E051D2EE2B7619CE0EAA6286D67A3A4D5BDB3",
        "signature": "304402204EF0AFB78AC23ED1C472E74F4299C0C21F1B21D07EFC0A3838A420F76D783A400220154FB11B6F54320666E4C36CA7F686C16A3A0456800BBC43746F34AF50290064",
        "public_key": "aB44YfzW24VDEJQ2UuLPV2PvqcPCSoLnL7y5M1EzhdW4LnK5xMS3",
        "amount": "1000000"
    }]
}
```

*Commandline*

```
#Syntax: channel_verify <public_key> <channel_id> <amount> <signature>
rippled channel_verify aB44YfzW24VDEJQ2UuLPV2PvqcPCSoLnL7y5M1EzhdW4LnK5xMS3 5DB01B7FFED6B67E6B0414DED11E051D2EE2B7619CE0EAA6286D67A3A4D5BDB3 1000000 304402204EF0AFB78AC23ED1C472E74F4299C0C21F1B21D07EFC0A3838A420F76D783A400220154FB11B6F54320666E4C36CA7F686C16A3A0456800BBC43746F34AF50290064
```

<!-- MULTICODE_BLOCK_END -->

The request includes the following parameters:

| Field | Type | Description |
|-------|------|-------------|
| `amount` | String | The amount of [XRP, in drops][], the provided `signature` authorizes. |
| `channel_id` | String | The Channel ID of the channel that provides the XRP. This is a 64-character hexadecimal string. |
| `public_key` | String | The public key of the channel and the key pair that was used to create the signature, in hexadecimal or base58 format. [Updated in: rippled 0.90.0][New in: rippled 0.90.0] |
| `signature` | String | The signature to verify, in hexadecimal. |

## Response Format

An example of a successful response:

<!-- MULTICODE_BLOCK_START -->

*WebSocket*

```
{
    "id": 1,
    "status": "success",
    "type": "response",
    "result": {
        "signature_verified":true
    }
}
```

*JSON-RPC*

```
200 OK

{
    "result": {
        "signature_verified":true,
        "status":"success"
    }
}
```

*Commandline*

```
{
    "result": {
        "signature_verified":true,
        "status":"success"
    }
}
```

<!-- MULTICODE_BLOCK_END -->

The response follows the [standard format][], with a successful result containing the following fields:

| Field | Type | Description |
|-------|------|-------------|
| `signature_verified` | Boolean | If `true`, the signature is valid for the stated amount, channel, and public key. |

**Caution:** This does not indicate check that the channel has enough XRP allocated to it. Before considering a claim valid, you should look up the channel in the latest validated ledger and confirm that the channel is open and its `amount` value is equal or greater than the `amount` of the claim. To do so, use the [account_channels method][].

## Possible Errors

* Any of the [universal error types][].
* `invalidParams` - One or more fields are specified incorrectly, or one or more required fields are missing.
* `publicMalformed` - The `public_key` field of the request is not a valid public key in the correct format. Public keys are 33 bytes and must be represented in base58 or hexadecimal. The base58 representation of account public keys starts with the letter `a`. The hexadecimal representation is 66 characters long.
* `channelMalformed` - The `channel_id` field of the request is not a valid Channel ID. The Channel ID must be a 256-bit (64-character) hexadecimal string.
* `channelAmtMalformed` - The value specified in the `amount` field was not a valid [XRP amount][XRP, in drops].


{% include '_snippets/rippled_versions.md' %}
{% include '_snippets/rippled-api-links.md' %}
