Binance API Withdrawal Error: "Signature for this request is not valid." - binance

Question

I'm facing an issue with the Binance API
Whenever I try to make a request for withdrawal, it returns "Signature for this request is not valid." error message, even though if with the same function I make a request for the account info, Funding balance, getAll balances or whatever, it works.
I already tried several solutions, but nothing seemed to work. This are some of my tries reading similar issues
Works with endpoints like "api/v3/account" or "sapi/v1/capital/config/getall"
Sending the signature and the params in the body (it returns "You are not authorized to execute this request" error message, I think is because is not reading the body, only query params)
Activate all permissions for the API, and check the API
Send in the query the param "name"
Using Node packages like node-binance-api (It's not up to date with the request for withdrawals)
Changing scripts in librery node-binance-api to the actual api for withdrawals (same error as doing it myself)
I'm using NodeJs, axios to make the requests. This is my function:
/**
* Send Request to withdraw USDT funds from the selected wallet to a specified address
* #param wallet
* #param amount
* #param address
* #returns
* #link https://binance-docs.github.io/apidocs/spot/en/#withdraw-user_data
*/
makeWithdrawal(
wallet: WalletType = 'SPOT',
amount: number,
address: string
) {
const walletIndex = WalletEnum[wallet];
return this.makeRequest<{ id: string }>(
'sapi/v1/capital/withdraw/apply',
'POST',
{
coin: 'USDT',
amount,
wallet: walletIndex,
address,
network: 'TRX',
name: '_'
}
);
}
/**
* Makes Request to Binance Pay API
* #param endpoint
* #param method
* #param params
* #returns
* #link https://binance-docs.github.io/apidocs/spot/en
*/
private makeRequest<T>(
endpoint: string,
method: Method = 'GET',
params: {[key: string]: string | number} = {}
): Promise<T> {
const timestamp = Number(new Date().getTime()).toFixed(0);
let query = `timestamp=${timestamp}`;
for (const key in params) {
if (Object.prototype.hasOwnProperty.call(params, key)) {
const value = params[key];
query += `&${key}=${value}`
}
}
const signature = this.sign(query);
const headers: AxiosRequestHeaders = {
'X-MBX-APIKEY': process.env.BINANCE_API_KEY,
};
const requestObservable = this.httpService.request<T>({
method,
url: `${process.env.BINANCE_API_URL}/${endpoint}`,
params: {...params, timestamp, signature},
headers
}).pipe(
map(res => res.data)
);
return lastValueFrom(requestObservable);
}
/**
* Signs payload with private key
* #param payload
* #returns
*/
private sign(query: string) {
return createHmac('sha256', process.env.BINANCE_API_SECRET)
.update(query)
.digest('hex');
}
I really can't understand what is going, if someone could please help me to solve this, as I'm reading this is a common issue, but I really tried solutions and no hope.
Thank you

Answer 1

For anyone having this problem, the issue was that I was sending the request inside the "params" instead of the url, weirdly enough, it didn't proccess it correctly, so make this small change:
const requestObservable = this.httpService.request<T>({
method,
url: `${process.env.BINANCE_API_URL}/${endpoint}?${query}&signature=${signature}`,
headers
}).pipe(
map(res => res.data)
);
And you are good to go