Estimate Withdrawal Fee

POST /withdrawal/fee-estimate/

Calculates the estimated fee for a cryptocurrency withdrawal. This endpoint allows you to get an approximation of the withdrawal fee before initiating the actual withdrawal transaction, helping users make informed decisions about their transfers.

Request Headers

Header	Description
Authorization	Bearer token for authentication: Bearer <access_token>
X-API-Key	API key for authentication (alternative to OAuth 2.0 token)

Request Parameters

Parameter	Type	Description
amount	number	The amount of cryptocurrency to withdraw
blockchain	string	The blockchain network to use. Options: ETH, BSC, TRX, SOL, ARB, BASE, BTC, LTC, DOGE, MATIC, AVAX, XRP, ADA
token	string	Optional. The token to withdraw. Default: USDT

Example Request

POST /withdrawal/fee-estimate/
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/json

{
  "amount": 100.50,
  "blockchain": "ETH",
  "token": "USDT"
}

Response Parameters

Parameter	Type	Description
currency	string	The currency code used for the fee calculation (e.g., USDTERC20)
fee	number	The estimated fee amount in the same currency

Example Response

{
  "currency": "USDTERC20",
  "fee": 1.50
}

Error Codes

Status Code	Error Code	Description
400	invalid_request	The request was malformed or contained invalid parameters
400	invalid_currency	The currency created from the blockchain/token combination is not supported
401	unauthorized	Authentication failed or token is missing
403	forbidden	Insufficient permissions to use this endpoint
422	invalid_amount	The amount must be a positive number
429	rate_limit_exceeded	Too many requests in a short period
500	service_unavailable	Fee estimation service is temporarily unavailable

Notes

• Fees are calculated based on current network conditions and may vary when the actual withdrawal is processed
• Fees generally include both the Cryptofuse service fee and the blockchain network fee
• For some blockchains, fees may be higher during periods of network congestion
• The fee is returned in the same currency as the withdrawal
• Currency codes are constructed based on the combination of token and blockchain (e.g., USDT on Ethereum is USDTERC20)

Fee Components

The total fee consists of:

1. Network Fee: The cost of processing the transaction on the blockchain
2. Service Fee: Cryptofuse's processing fee
3. Priority Fee: Optional fee for faster processing (when applicable)

Common Currency Codes

Blockchain	Token	Currency Code
ETH	USDT	USDTERC20
TRX	USDT	USDTTRC20
BSC	USDT	USDTBSC
SOL	USDT	USDTSOL
ARB	USDT	USDTARB
BASE	USDT	USDTBASE

Example: Ethereum USDT Withdrawal Fee

POST /withdrawal/fee-estimate/
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/json

{
  "amount": 500.00,
  "blockchain": "ETH",
  "token": "USDT"
}

Response:

{
  "currency": "USDTERC20",
  "fee": 2.25
}

Example: Tron USDT Withdrawal Fee

POST /withdrawal/fee-estimate/
Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...
Content-Type: application/json

{
  "amount": 500.00,
  "blockchain": "TRX",
  "token": "USDT"
}

Response:

{
  "currency": "USDTTRC20",
  "fee": 1.00
}