Approve Token

Approve token spending (EVM and Tron only)

post

Authorizations

X-StampstringRequired

Base64URL-encoded JSON: { "publicKey": "<hex ed25519 pubkey>", "signature": "<hex ed25519 sig>" }. The signature covers JSON.stringify([binding, Object.entries(params)]), where binding is "<METHOD> <routePath>" (the server's route pattern, e.g. "POST /waas/create-wallet") and params is the request body (POST) or query params (GET). This binds the stamp to its own route so it cannot be replayed against a different endpoint. The one parameterized route, GET /waas/scheduled-transaction/{scheduleId}, binds to the literal "GET /waas/scheduled-transaction/:scheduleId", not the concrete ID. See the Signing Requests guide for runnable examples.

Body

organizationIdstringRequired

userIdstringRequired

fromAddressstringRequired

chainIdstringRequired

tokenstringRequired

Token contract address

spenderstringRequired

Address being approved

amountstringRequired

Approval amount

noncestringRequired

Responses

200

Transaction submitted

application/json

400

Bad request

application/json

401

Invalid or missing X-Stamp

application/json

500

Internal server error

application/json

post/waas/wallet/contract/approve

POST /waas/wallet/contract/approve HTTP/1.1
Host: api.hinkal.io
X-Stamp: YOUR_API_KEY
Content-Type: application/json
Accept: */*
Content-Length: 142

{
  "organizationId": "text",
  "userId": "text",
  "fromAddress": "text",
  "chainId": "text",
  "token": "text",
  "spender": "text",
  "amount": "text",
  "nonce": "text"
}

{
  "status": "success",
  "data": {
    "txHash": "0xabc123..."
  }
}