coinbase_fetchPermission

Retrieve a single permission by its hash

Coinbase-specific RPC method

Retrieves a single spend permission by its unique hash identifier. This method allows direct lookup of a specific permission without needing to know the account, chain, or spender details.

Parameters

permissionHash · string · required

The unique hash identifier of the permission to retrieve.

Returns

result · object

The permission response object.

Show FetchPermissionResult properties

permission · object

The permission object containing all details of the requested permission.

Show Permission properties

createdAt · number

Unix timestamp when the permission was created.

permissionHash · string

The unique hash identifier of the permission.

signature · string

The cryptographic signature authorizing this permission.

spendPermission · object

The detailed spend permission parameters.

Show SpendPermission properties

account · string

The address of the account granting the permission.

spender · string

The address authorized to spend from the account.

token · string

The token contract address for which spending is authorized.

allowance · string

The maximum amount that can be spent (in smallest unit).

period · number

The duration in seconds for which the permission is valid within each period.

start · number

Unix timestamp when the permission becomes active.

end · number

Unix timestamp when the permission expires.

salt · string

A unique value used to generate the permission hash.

extraData · string

Additional data associated with the permission (hex encoded).

Request

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "coinbase_fetchPermission",
  "params": [{
    "permissionHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
  }]
}

Success Response

{
  "id": 1,
  "jsonrpc": "2.0",
  "result": {
    "permission": {
      "createdAt": 1640995200,
      "permissionHash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
      "signature": "0xdef456...",
      "spendPermission": {
        "account": "0xfB2adc8629FC9F54e243377ffcECEb437a42934C",
        "spender": "0x2a83b0e4462449660b6e7567b2c81ac6d04d877d",
        "token": "0xA0b86a33E6441b97B7cd5C4F5B42a6e2F8a38923",
        "allowance": "1000000000000000000",
        "period": 86400,
        "start": 1640995200,
        "end": 1672531200,
        "salt": "12345678901234567890",
        "extraData": "0x"
      }
    }
  }
}

{
  "id": 1,
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Permission not found"
  }
}

Error Handling

Code	Message	Description
-32602	Invalid params	The permissionHash parameter is invalid or missing
-32603	Internal error	Permission not found or internal server error
-32001	Failed precondition	The method is currently disabled via kill switch

The permissionHash must be a valid hex-encoded hash string. The method will return an error if the permission doesn’t exist or has been deleted.

Usage Notes

This method is particularly useful when:

• You have a permission hash from a previous operation and need to retrieve its details
• You want to verify the current state of a specific permission
• You need to look up permission details without knowing the account or spender information

Unlike coinbase_fetchPermissions, this method:

• Returns a single permission instead of a list
• Does not require account, chain, or spender parameters
• Does not support pagination
• Provides direct access via the permission’s unique identifier