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POST
/
#particle_swap_checkApprove
checkApprove
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,
  "method": "particle_swap_checkApprove",
  "params": [
    "0x369aa8a7a7BE683E1a46d9A056806B2B3FD778C8"
  ],
  "chainId": 1
}
'
{
  "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.

​
chainId
integer

The blockchain chain ID.

Example:

1