Token Approval

POST /approve This endpoint generates an unsigned transaction for approving token spending. The approval transaction lets a smart contract (or a specified sender address) spend a given amount of tokens on behalf of the recipient. If a sender is provided, the approval will be generated using that address (and only the ENSC asset type is allowed in that case). Otherwise, the recipient’s address is used. Headers

Name	Value
Content-Type	`application/json`
Authorization	`Bearer <api_key>`

Body

Name	Type	Description
`recipient`	string	The wallet address that will receive the approval.
`assetType`	string	The asset type, provided as an enum value (e.g., `ENSC`, `USDC`, `USDT`, etc.).
`amount`	number	The amount to approve.
`sender`	string	Optional. If provided, the approval will be generated using this address instead of the recipient. When provided, only `ENSC` is allowed as the asset type.

Example 1: Approval for Redeeming Assets (No Sender Provided) Request

Body
Response (200) Ok
Invalid Recipient (400) bad

{
  "recipient": "0xRecipientAddressABC123",
  "assetType": "USDC",
  "amount": 50
}

{
  "status": 200,
  "message": "Unsigned approve transaction generated successfully",
  "data": {
    "to": "0xTokenContractAddressXYZ",
    "value": 0,
    "gasLimit": "0x186a0",
    "gasPrice": "20000000000",
    "nonce": "5",
    "data": "0x095ea7b3000000000000000000000000DEXContractAddressDEF4560000000000000000000000000000000000000000000000000000000000000032",
    "from": "0xRecipientAddressABC123",
    "spender": "0xDEXContractAddressDEF456"
  }
}

{
  "status": 400,
  "error": "Invalid Request",
  "message": "Invalid recipient address",
  "data": null
}

Example 2: Approval for Transfers (Sender Provided) Request

Body
Response (200) Ok
Invalid Asset When Sender is Provided (400) bad

{
  "recipient": "0xRecipientAddressABC123",
  "sender": "0xSenderAddress987654",
  "assetType": "ENSC",
  "amount": 10
}

{
  "status": 200,
  "message": "Unsigned approve transaction generated successfully",
  "data": {
    "to": "0xTokenContractAddressXYZ",
    "value": 0,
    "gasLimit": "0x186a0",
    "gasPrice": "20000000000",
    "nonce": "12",
    "data": "0x095ea7b3000000000000000000000000SenderAddress987654000000000000000000000000000000000000000000000000000000000000000a",
    "from": "0xSenderAddress987654",
    "spender": "0xSenderAddress987654"
  }
}

{
  "status": 400,
  "error": "Invalid Asset",
  "message": "When a sender is provided, only ENSC asset type is allowed",
  "data": null
}

Overview

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