checkApprove

Learn how to use the checkApprove JSON-RPC method.

POST /#particle_swap_checkApprove

checkApprove

cURL

curl --request POST \
  --url 'https://rpc.particle.network/evm-chain/#particle_swap_checkApprove' \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "jsonrpc": "2.0",
  "id": 1,
  "params": [
    "0x369aa8a7a7BE683E1a46d9A056806B2B3FD778C8"
  ],
  "chainId": 1
}
'

200

{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "approved": true,
    "tx": {
      "to": "0x111111111117dC0aa78b770fA6A738034120C302",
      "data": "0x095ea7b30000000000000000000000001111111254fb6c44bac0bed2854e76f90643097d000000000000000000000000000000000000000000000000000000003b9aca00",
      "value": "0x0"
    }
  },
  "chainId": 1
}

Contextualizing checkApprove

• checkApprove returns a Boolean based upon whether a given address has approved spending of a specified amount for a particular ERC-20 token. It takes:
  • address - string.
  • Token object, containing:
    • tokenAddress - string.
    • amount - string.

---

Query example

JSON

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "particle_swap_checkApprove",
  "params": [
    "0x369aa8a7a7BE683E1a46d9A056806B2B3FD778C8", // wallet address
    {
      "tokenAddress": "0x111111111117dc0aa78b770fa6a738034120c302", // from token address
      "amount": "1000000000"
    }
  ]
}

Authorizations

Authorization · string · header · required

Basic authentication header of the form Basic <encoded-value>, where <encoded-value> is the base64-encoded string username:password.

Body

application/json

Request to check if a token is approved for swapping.

jsonrpc · string · default: 2.0 · required

Version of the JSON-RPC protocol, should be 2.0.

Example:

"2.0"

id · integer · default: 1 · required

The request identifier.

Example:

1

method · enum<string> · required

API method being called.

Available options: particle_swap_checkApprove

params · (string | object)[] · required

Parameters for checking token approval.

User address.

Example:

"0x369aa8a7a7BE683E1a46d9A056806B2B3FD778C8"

chainId · integer

The blockchain chain ID.

Example:

1

Response

200 - application/json

Successful response with approval status.

jsonrpc · string · default: 2.0 · required

Version of the JSON-RPC protocol, should be 2.0.

Example:

"2.0"

id · integer · default: 1 · required

The request identifier.

Example:

1

result · object · required

Approval status and transaction details.

Show child attributes

chainId · integer

The blockchain chain ID.

Example:

1