Introduction

The FixedFloat API allows you to automate the receipt of information about the exchange rates of currencies, created orders, presented on the FixedFloat service, create orders and manage them using it.

To use the FixedFloat API, you need to get an API key and an API secret.

Getting the API key

To get an API Key and API Secret, follow these steps:

  1. Sign in or Register in the FixedFloat
  2. Go to the API management section
  3. Click the "Generate" button and follow the instructions in the window that appears
  4. Copy the API Key and API Secret and keep them in a safe place. Use these parameters for requests to the FixedFloat API

Request and example

The sent data must be in JSON format with UTF-8 encoding.

For successful API requests, all requests must contain a few mandatory headers:

  • The Content-Type header must be application/json; charset=UTF-8
  • The X-API-KEY header should contain your received API Key (YOUR_API_KEY)
  • The X-API-SIGN header must contain the signature GENERATED_SIGN. To get the signature you must use your API Secret (YOUR_API_SECRET) as the HMAC SHA256 operation key and the json data string as the value.
X-API-SIGN generation
[linux]$ echo -n 'DATA_JSON' | openssl dgst -sha256 -hmac "YOUR_API_SECRET"
(stdin)= GENERATED_SIGN
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d 'DATA_JSON'
  "https://ff.io/api/v2/METHOD" -L
import hmac
import json
import hashlib
import requests
  
def sign(data):
  return hmac.new(
    key=YOUR_API_SECRET.encode(),
    msg=data.encode(),
    digestmod=hashlib.sha256
  ).hexdigest()
  
  
def request(method, params={}):
  url = 'https://ff.io/api/v2/' + method
  data = json.dumps(params)
  headers = {
    'X-API-KEY':  YOUR_API_KEY,
    'X-API-SIGN': sign(data)
  }
  r = requests.post(url, data=data, headers=headers)
  return r.json()
  
request(METHOD, DATA)
<?php
  function sign($data) {
    return hash_hmac('sha256', $data, YOUR_API_SECRET);
  }
  
  function request($method, $data) {
    $url = 'https://ff.io/api/v2/'.$method;
    
    $req = json_encode($data);
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
      'Content-Type:application/json',
      'X-API-KEY: '  . YOUR_API_KEY,
      'X-API-SIGN: ' . sign($req)
    ));
    $response = curl_exec($ch);
    curl_close($ch);
    
    $result = json_decode($response, true);
    if ($result['code'] == 0) {
      return $result['data'];
    } else {
      throw new Exception($result['msg'], $result['code']);
    }
  }
  
  request(METHOD, DATA);
?>

Request limits

The request limit per minute is 250 weight units.

The /api/v2/create request costs 50 weight units, all other requests cost 1 weight unit.

If the limit is exceeded, your token will be temporarily blocked. With each subsequent exceeding of the limit after unlocking, the blocking time will increase

Official Libraries

You can use ready made libraries to use the FixedFloat API:

Available currencies

POSThttps://ff.io/api/v2/ccies

Getting a list of currencies supported by the FixedFloat service, as well as data on their display and information about the availability for receiving and sending.

Parameters

There is no need to pass parameters for this request.

X-API-SIGN is generated by calling the HMAC SHA256 function from an empty string if no parameters are passed, or from an empty JSON object.

Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  "https://ff.io/api/v2/ccies" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  return $ff->ccies();
?>

Response

A successful response contains an array of currency information objects.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
dataArrayList of currencies supported by FixedFloat
data[].codestringUnique currency code in FixedFloat
data[].coinstringCommon asset ticker
data[].networkstringBlockchain network in which this asset is represented
data[].namestringName of currency
data[].recvbooleanAvailability of currency for acceptance into the service from the client
data[].sendbooleanAvailability of currency to send to the client
data[].tagstringThe name of the additional field, if available; otherwise null
data[].logostringLink to currency image
data[].colorstringCurrency color specified in HEX format
data[].prioritynumberPriority in the list of currencies of the service
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": [
    {
      "code": "BTC",
      "coin": "BTC",
      "network": "BTC",
      "name": "Bitcoin",
      "recv": true,
      "send": true,
      "tag": null,
      "logo": "https://fixedfloat.com/assets/images/coins/svg/btc.svg",
      "color": "#f7931a",
      "priority": "5",
    },
    ...,
  ],
}

Exchange rate

POSThttps://ff.io/api/v2/price

Getting the exchange rate of a pair of currencies in the selected direction and type of rate.

ATTENTION! To get the exchange rates of all available currencies, you should use the export rate file available at the link https://ff.io/rates.xml

For this method, as well as for method /api/v2/create, it is possible to increase accrued earnings under the affiliate program using parameter afftax.

The final exchange rate when passing parameters afftax and refcode depends on whether your affiliate program code has been approved for earning for orders generated by the API and the base percentage (AFFBASE) set for your code, and will be calculated according to the formula:

total = FF - AFFB + afftax, if afftax < FF - AFFB
total = afftax x 2        , if FF - AFFB < afftax < FF
total = FF + afftax       , if afftax > FF

where FF is the base percentage of the service for the selected type of exchange rate (1% for a fixed rate and 0.5% for a floating rate);
AFFB is the base percentage of the service profit set for your affiliate program code, for the selected type of exchange rate (AFFBASE for a fixed rate and AFFBASE÷2 for a floating rate)

For clarity, we suggest that you familiarize yourself with the table below with AFFBASE=0.4, where FFP = FF - AFFB:

FIXED RATE FLOAT RATE
Total FFP afftax Total FFP afftax
1.0 0.6 0.4 0.5 0.3 0.2
1.1 0.6 0.5 0.55 0.3 0.25
1.2 0.6 0.6 0.6 0.3 0.3
1.4 0.7 0.7 0.7 0.35 0.35
1.6 0.8 0.8 0.8 0.4 0.4
1.8 0.9 0.9 0.9 0.45 0.45
2.0 1.0 1.0 1.0 0.5 0.5
2.1 1.0 1.1 1.05 0.5 0.55
2.2 1.0 1.2 1.1 0.5 0.6

If your affiliate code did not have a base API earnings percentage set, then the final exchange rate will be calculated as:

FF + afftax

where FF is the base percentage of the service for the selected type of exchange rate (1% for a fixed rate and 0.5% for a floating rate).

Earnings will be credited to your account if the affiliate program code was passed in the refcode parameter and this code belongs to your account. Otherwise, the afftax and refcode parameters will be ignored.

Parameters

NameRequiredTypeDescription
typetruestringOrder type
fromCcytruestringCode of the currency the client wants to send
toCcytruestringCode of the currency the client wants to receive
directiontruestring The direction of the exchange determines whether the client wants to send a certain amount or receive a certain amount. Can take one of the following values:
from — if the client wants to send the amount amount in the currency fromCcy
to — if the client wants to receive the amount amount in the currency toCcy
amounttruenumericIf direction="from", then this is the amount in currency fromCcy that the client wants to send.
If direction="to", then this is the amount in currency toCcy that the client wants to receive
cciesfalsebooleanAdding a list of currencies to the response with information about the availability for sending and receiving
usdfalsebooleanAmount in USD, by which fromAmount or toAmount will be changed in case the limits are exceeded
refcodefalsestringAffiliate program code for which earnings will be accrued under the affiliate program. If the afftax parameter is not set and this affiliate program code does not participate in earning via the API, passing this parameter will not affect anything. It is possible to transfer only affiliate program codes that were received in the same account in which the API key used for this request was received
afftaxfalsefloatDesired earnings under the affiliate program as a percentage of the exchange amount. Affects the final exchange rate and earnings under the affiliate program if the refcode parameter is also set.
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"fromCcy":"BTC","toCcy":"USDTTRC","amount":0.5,direction":"from","type":"float"}'
  "https://ff.io/api/v2/price" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'fromCcy'    => 'BTC',
    'toCcy'      => 'USDTTRC',
    'amount'     => '0.5',
    'direction'  => 'from',
    'type'       => 'float',
  );
  
  return $ff->price($data);
?>

Response

A successful response contains information about the currencies of the selected pair, the exchange rate, and the amount sent and received.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
dataObjectAn object with information about the currencies of the selected pair, the exchange rate, and the amount sent and received
data.fromObjectData about the asset that the client must send
data.from.codestringUnique currency code in FixedFloat
data.from.networkstringBlockchain network in which this asset is represented
data.from.coinstringCommon asset ticker
data.from.amountstringAmount that the client needs to send
data.from.ratestringFinal exchange rate
data.from.precisionintegerRounding accuracy
data.from.minstringMinimum amount
data.from.maxstringMaximum amount
data.from.usdstringEquivalent in USD
data.from.btcstringEquivalent in BTC
data.toObjectData about the asset that the client will receive
data.to.codestringUnique currency code in FixedFloat
data.to.networkstringBlockchain network in which this asset is represented
data.to.coinstringCommon asset ticker
data.to.amountstringAmount that the client must to receive
data.to.ratestringFinal exchange rate
data.to.precisionintegerRounding accuracy
data.to.minstringMinimum amount
data.to.maxstringMaximum amount
data.to.usdstringEquivalent in USD
data.errorsArrayAn array of a list of errors. If the array is empty, then creating an order with these parameters is possible.
The array may contain the following errors:
MAINTENANCE_FROM — Currency from data.from object under maintenance
MAINTENANCE_TO — Currency from object data.to under maintenance
OFFLINE_FROM — Currency from object data.from is not available
OFFLINE_TO — Currency from object data.to is not available
RESERVE_FROM — Not enough currency reserves from object data.from
RESERVE_TO — Not enough currency reserves from object data.to
LIMIT_MIN — Amount less than limit
LIMIT_MAX — The amount is greater than the limit
data.cciesArrayAdded if the ccies parameter is true. An array containing a list of objects with information about the availability for sending and receiving currencies
data.ccies[].codestringUnique currency code in FixedFloat
data.ccies[].recvbooleanAvailability of currency for acceptance into the service from the client
data.ccies[].sendbooleanAvailability of currency to send to the client
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": {
    "from": {
      "code": "BSC",
      "network": "BSC",
      "coin": "BNB",
      "amount": "0.040297",
      "rate": "0.01452202",
      "precision": 8,
      "min": "0.005053",
      "max": "967.072057",
      "usd": "12.28",
      "btc": "0.00058813",
    },
    "to": {
      "code": "BTC",
      "network": "BTC",
      "coin": "BTC",
      "amount": "0.00055984",
      "rate": "68.164781",
      "precision": 8,
      "min": "0.0000479",
      "max": "14.04381911",
      "usd": "11.69",
    },
    "errors": [],
    "ccies": [
      {
        "code": "ADA",
        "recv": true,
        "send": true,
      },
      ...,
    ],
  },
}

Create order

POSThttps://ff.io/api/v2/create

Creating an order for the exchange of selected currencies with a specified amount and address.

For this method, as well as for the /api/v2/price method, it is possible to increase accrued earnings under the affiliate program using the parameter afftax. The rules for using this parameter are described in method /api/v2/price

Parameters

NameRequiredTypeDescription
typetruestringOrder type
fromCcytruestringCode of the currency the client wants to send
toCcytruestringCode of the currency the client wants to receive
directiontruestring The direction of the exchange determines whether the client wants to send a certain amount or receive a certain amount. Can take one of the following values:
from — if the client wants to send the amount amount in the currency fromCcy
to — if the client wants to receive the amount amount in the currency toCcy
amounttruenumericIf direction="from", then this is the amount in currency fromCcy that the client wants to send.
If direction="to", then this is the amount in currency toCcy that the client wants to receive
toAddresstruestringDestination address to which the funds will be dispatched upon the successful completion of the Order
tagfalsebooleanIf you need to specify a Memo or Destination Tag when sending, you should specify it here. This parameter can be omitted by specifying the MEMO or Destination Tag in toAddress separated by a colon.
refcodefalsestringAffiliate program code for which earnings will be accrued under the affiliate program. If the afftax parameter is not set and this affiliate program code does not participate in earning via the API, passing this parameter will not affect anything. It is possible to transfer only affiliate program codes that were received in the same account in which the API key used for this request was received
afftaxfalsefloatDesired earnings under the affiliate program as a percentage of the exchange amount. Affects the final exchange rate and earnings under the affiliate program if the refcode parameter is also set.
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"fromCcy":"BTC","toCcy":"USDTTRC","amount":0.5,direction":"from","type":"float","toAddress":"TAzsQ9Gx8eqFNFSKbeXrbi45CuVPHzA8wr"}'
  "https://ff.io/api/v2/create" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'fromCcy'    => 'BTC',
    'toCcy'      => 'USDTTRC',
    'amount'     => '0.5',
    'direction'  => 'from',
    'type'       => 'float',
    'toAddress'  => 'TAzsQ9Gx8eqFNFSKbeXrbi45CuVPHzA8wr'
  );
  
  return $ff->create($data);
?>

Response

A successful response contains an object with information about all the data of the created order, including the token parameter, for later obtaining updated information about the order using the /api/v2/ method order, and order management.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
dataObjectObject with information about all the data of the created order
data.tokenstringOrder access token
data.idstringOrder ID. Consists of 6 characters
data.typestringOrder type. Can be one of the values:
fixed — fixed rate order
float — floating rate order
data.emailstringEmail address for the order to receive notifications about changes in the order
data.statusstringOrder status. Can be one of the values:
NEW — New order
PENDING — Transaction received, pending confirmation
EXCHANGE — Transaction confirmed, exchange in progress
WITHDRAW — Sending funds
DONE — Order completed
EXPIRED — Order expired
EMERGENCY — Emergency, customer choice required
data.timeObjectObject containing timestamp data
data.time.regnumberOrder creation timestamp
data.time.startnumberTransaction receive timestamp
data.time.finishnumberTimestamp when the order was completed
data.time.updatenumberTimestamp of last order update
data.time.expirationnumberTimestamp when order expires
data.time.leftnumberThe number of seconds before the end of the order
data.fromObjectAn object containing information about the currency sent by clients and transactions
data.from.codestringCurrency code
data.from.coinstringCommon asset ticker
data.from.networkstringBlockchain network in which this asset is represented
data.from.namestringName of currency
data.from.aliasstringAlias for creating qr code
data.from.amountstringAmount that the client needs to send
data.from.addressstringThe destination address to which the user is ought to deposit his funds in order for the trade to execute
data.from.tagstringMEMO or Destination Tag if required
data.from.addressMixstringAddress with a colon-connected tag
data.from.reqConfirmationsnumberRequired number of transaction confirmations
data.from.maxConfirmationsnumberThe maximum number of transaction confirmations that system updates
data.from.txObjectAn object containing data about the received transaction
data.from.tx.idstringTransaction hash
data.from.tx.amountstringTransaction amount
data.from.tx.feestringMiner fee
data.from.tx.ccyfeestringCurrency of Miner fee
data.from.tx.timeRegnumberTransaction registration timestamp
data.from.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.from.tx.confirmationsnumberNumber of transaction confirmations
data.toObjectAn object containing information about the currency received by the client and the transaction
data.to.codestringCurrency code
data.to.coinstringCommon asset ticker
data.to.networkstringBlockchain network in which this asset is represented
data.to.namestringName of currency
data.to.aliasstringAlias for creating qr code
data.to.amountstringAmount that the client must to receive
data.to.addressstringThe destination address to which the funds will be dispatched upon the successful completion of the order
data.to.tagstringMEMO or Destination Tag if required
data.to.addressMixstringAddress with a colon-connected tag
data.to.txObjectAn object containing data about the sent transaction
data.to.tx.idstringTransaction hash
data.to.tx.amountstringTransaction amount
data.to.tx.feestringMiner fee
data.to.tx.ccyfeestringCurrency of Miner fee
data.to.tx.timeRegnumberTransaction registration timestamp
data.to.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.to.tx.confirmationsnumberNumber of transaction confirmations
data.backObjectAn object containing information about the currency returned to the client and the transaction
data.back.codestringCurrency code
data.back.coinstringCommon asset ticker
data.back.networkstringBlockchain network in which this asset is represented
data.back.namestringName of currency
data.back.aliasstringAlias for creating qr code
data.back.amountstringThe amount that the client should receive upon return, excluding the miner fee
data.back.addressstringThe return address to which the funds will be sent when choosing a refund
data.back.tagstringMEMO or Destination Tag if required
data.back.addressMixstringAddress with a colon-connected tag
data.back.txObjectAn object containing data about the returned transaction
data.back.tx.idstringTransaction hash
data.back.tx.amountstringTransaction amount
data.back.tx.feestringMiner fee
data.back.tx.ccyfeestringCurrency of Miner fee
data.back.tx.timeRegnumberTransaction registration timestamp
data.back.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.back.tx.confirmationsnumberNumber of transaction confirmations
data.emergencyObjectAn object containing data about the emergency in the order
data.emergency.statusArrayEmergency status. Can be multiple values from:
EXPIRED — the transaction was received after the expiration of the order
LESS — a transaction was sent with an amount less than in the order
MORE — a transaction was sent with an amount greater than in the order
LIMIT — a transaction was sent with an amount less or more than the limit; used with LESS or MORE
data.emergency.choicestringuser choice. Can be one of the values:
NONE — Choice not made
EXCHANGE — Continue order at the new market rate
REFUND — Make a refund minus the network commission
data.emergency.repeatbooleanif true, then a repeated transaction has been received for this order
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": {
    "id": "TESTID",
    "type": "float",
    "email": "",
    "status": "NEW",
    "time": {
      "reg": 1676458603,
      "start": null,
      "finish": null,
      "update": 1676458603,
      "expiration": 1676460403,
      "left": 1800,
    },
    "from": {
      "code": "BTC",
      "coin": "BTC",
      "network": "BTC",
      "name": "Bitcoin",
      "alias": "bitcoin",
      "amount": "0.50000000",
      "address": "bc1qm8e58htm6qlhz5u7awhe4a5kxt3w86ffwtl9j0",
      "addressAlt": null,
      "tag": null,
      "tagName": null,
      "reqConfirmations": 1,
      "maxConfirmations": 6,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "to": {
      "code": "USDTTRC",
      "coin": "USDT",
      "network": "TRX",
      "name": "Tether (TRC20)",
      "alias": "usdt",
      "amount": "11062.06500000",
      "address": "TVnbp1VCJ1TpWMom4k3URfFky9FGfPdZPd",
      "tag": null,
      "tagName": null,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "back": {
      "code": null,
      "coin": null,
      "network": null,
      "name": null,
      "alias": null,
      "amount": null,
      "address": null,
      "tag": null,
      "tagName": null,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "emergency": {
      "status": [],
      "choice": "NONE",
      "repeat": 0,
    },
    "token": "TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7",
  },
}

Get order details

POSThttps://ff.io/api/v2/order

The method receives the updated order data.

Parameters

NameRequiredTypeDescription
idtruestringOrder ID
tokentruestringOrder security token received when creating an order in data.token
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"id":"TESTID","token":"TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7"}'
  "https://ff.io/api/v2/order" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'id'    => 'TESTID',
    'token' => 'TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7',
  );
  
  return $ff->order($data);
?>

Response

A successful response contains contains an object with information about all the data of the created order

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
dataObjectObject with information about all the data of the created order
data.idstringOrder ID. Consists of 6 characters
data.typestringOrder type. Can be one of the values:
fixed — fixed rate order
float — floating rate order
data.emailstringEmail address for the order to receive notifications about changes in the order
data.statusstringOrder status. Can be one of the values:
NEW — New order
PENDING — Transaction received, pending confirmation
EXCHANGE — Transaction confirmed, exchange in progress
WITHDRAW — Sending funds
DONE — Order completed
EXPIRED — Order expired
EMERGENCY — Emergency, customer choice required
data.timeObjectObject containing timestamp data
data.time.regnumberOrder creation timestamp
data.time.startnumberTransaction receive timestamp
data.time.finishnumberTimestamp when the order was completed
data.time.updatenumberTimestamp of last order update
data.time.expirationnumberTimestamp when order expires
data.time.leftnumberThe number of seconds before the end of the order
data.fromObjectAn object containing information about the currency sent by clients and transactions
data.from.codestringCurrency code
data.from.coinstringCommon asset ticker
data.from.networkstringBlockchain network in which this asset is represented
data.from.namestringName of currency
data.from.aliasstringAlias for creating qr code
data.from.amountstringAmount that the client needs to send
data.from.addressstringThe destination address to which the user is ought to deposit his funds in order for the trade to execute
data.from.tagstringMEMO or Destination Tag if required
data.from.addressMixstringAddress with a colon-connected tag
data.from.reqConfirmationsnumberRequired number of transaction confirmations
data.from.maxConfirmationsnumberThe maximum number of transaction confirmations that system updates
data.from.txObjectAn object containing data about the received transaction
data.from.tx.idstringTransaction hash
data.from.tx.amountstringTransaction amount
data.from.tx.feestringMiner fee
data.from.tx.ccyfeestringCurrency of Miner fee
data.from.tx.timeRegnumberTransaction registration timestamp
data.from.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.from.tx.confirmationsnumberNumber of transaction confirmations
data.toObjectAn object containing information about the currency received by the client and the transaction
data.to.codestringCurrency code
data.to.coinstringCommon asset ticker
data.to.networkstringBlockchain network in which this asset is represented
data.to.namestringName of currency
data.to.aliasstringAlias for creating qr code
data.to.amountstringAmount that the client must to receive
data.to.addressstringThe destination address to which the funds will be dispatched upon the successful completion of the order
data.to.tagstringMEMO or Destination Tag if required
data.to.addressMixstringAddress with a colon-connected tag
data.to.txObjectAn object containing data about the sent transaction
data.to.tx.idstringTransaction hash
data.to.tx.amountstringTransaction amount
data.to.tx.feestringMiner fee
data.to.tx.ccyfeestringCurrency of Miner fee
data.to.tx.timeRegnumberTransaction registration timestamp
data.to.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.to.tx.confirmationsnumberNumber of transaction confirmations
data.backObjectAn object containing information about the currency returned to the client and the transaction
data.back.codestringCurrency code
data.back.coinstringCommon asset ticker
data.back.networkstringBlockchain network in which this asset is represented
data.back.namestringName of currency
data.back.aliasstringAlias for creating qr code
data.back.amountstringThe amount that the client should receive upon return, excluding the miner fee
data.back.addressstringThe return address to which the funds will be sent when choosing a refund
data.back.tagstringMEMO or Destination Tag if required
data.back.addressMixstringAddress with a colon-connected tag
data.back.txObjectAn object containing data about the returned transaction
data.back.tx.idstringTransaction hash
data.back.tx.amountstringTransaction amount
data.back.tx.feestringMiner fee
data.back.tx.ccyfeestringCurrency of Miner fee
data.back.tx.timeRegnumberTransaction registration timestamp
data.back.tx.timeBlocknumberTimestamp for adding a transaction to a block
data.back.tx.confirmationsnumberNumber of transaction confirmations
data.emergencyObjectAn object containing data about the emergency in the order
data.emergency.statusArrayEmergency status. Can be multiple values from:
EXPIRED — the transaction was received after the expiration of the order
LESS — a transaction was sent with an amount less than in the order
MORE — a transaction was sent with an amount greater than in the order
LIMIT — a transaction was sent with an amount less or more than the limit; used with LESS or MORE
data.emergency.choicestringuser choice. Can be one of the values:
NONE — Choice not made
EXCHANGE — Continue order at the new market rate
REFUND — Make a refund minus the network commission
data.emergency.repeatbooleanif true, then a repeated transaction has been received for this order
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": {
    "id": "TESTID",
    "type": "float",
    "email": "",
    "status": "NEW",
    "time": {
      "reg": 1676458603,
      "start": null,
      "finish": null,
      "update": 1676458603,
      "expiration": 1676460403,
      "left": 1800,
    },
    "from": {
      "code": "BTC",
      "coin": "BTC",
      "network": "BTC",
      "name": "Bitcoin",
      "alias": "bitcoin",
      "amount": "0.50000000",
      "address": "bc1qm8e58htm6qlhz5u7awhe4a5kxt3w86ffwtl9j0",
      "addressAlt": null,
      "tag": null,
      "tagName": null,
      "reqConfirmations": 1,
      "maxConfirmations": 6,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "to": {
      "code": "USDTTRC",
      "coin": "USDT",
      "network": "TRX",
      "name": "Tether (TRC20)",
      "alias": "usdt",
      "amount": "11062.06500000",
      "address": "TVnbp1VCJ1TpWMom4k3URfFky9FGfPdZPd",
      "tag": null,
      "tagName": null,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "back": {
      "code": null,
      "coin": null,
      "network": null,
      "name": null,
      "alias": null,
      "amount": null,
      "address": null,
      "tag": null,
      "tagName": null,
      "tx": {
        "id": null,
        "amount": null,
        "fee": null,
        "ccyfee": null,
        "timeReg": null,
        "timeBlock": null,
        "confirmations": null,
      },
    },
    "emergency": {
      "status": [],
      "choice": "NONE",
      "repeat": 0,
    },
  },
}

Emergency Action Choice

POSThttps://ff.io/api/v2/emergency

Selecting an action (continuation of exchange or return) for an order in the EMERGENCY status.

Parameters

NameRequiredTypeDescription
idtruestringOrder ID
tokentruestringOrder security token received when creating an order in data.token
choice true string Choice of action in the EMERGENCY status. Can be one of the values:
EXCHANGE — Continue the exchange at the market rate at the time the selection was made or at the time the order was corrected
REFUND — Refund minus miner fee
addressfalse*stringThe address to which the refund is to be made. Required if choice="REFUND".
tagfalsestringMEMO or Destination Tag if required
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"id":"TESTID","token":"TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7","choice":"EXCHANGE"}'
  "https://ff.io/api/v2/emergency" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'id'    => 'TESTID',
    'token' => 'TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7',
    'choice' => 'EXCHANGE',
  );
  
  return $ff->emergency($data);
?>

Response

A successful response contains True if the choice in the order has been set.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
databooleanTrue if successful
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": true,
}

Subscribe to notification

POSThttps://ff.io/api/v2/setEmail

Subscribe to receive notifications by email about a change in the status of the selected order.

Parameters

NameRequiredTypeDescription
idtruestringOrder ID
tokentruestringOrder security token received when creating an order in data.token
emailfalse*stringEmail address to which email notifications about order status changes should be sent
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"id":"TESTID","token":"TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7","email":"[email protected]"}'
  "https://ff.io/api/v2/setEmail" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'id'    => 'TESTID',
    'token' => 'TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7',
    'email' => '[email protected]',
  );
  
  return $ff->setEmail($data);
?>

Response

A successful response contains True if the notification has been subscribed.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
databooleanTrue if successful
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": true,
}

Images of QR codes

POSThttps://ff.io/api/v2/qr

Getting a list of images of QR codes for an order

Parameters

NameRequiredTypeDescription
idtruestringOrder ID
tokentruestringOrder security token received when creating an order in data.token
Example request
cURL -X POST \
  -H "Accept: application/json" \
  -H "X-API-KEY: YOUR_API_KEY" \
  -H "X-API-SIGN: GENERATED_SIGN" \
  -H "Content-Type: application/json; charset=UTF-8" \
  -d '{"id":"TESTID","token":"TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7","choice":"EXCHANGE"}'
  "https://ff.io/api/v2/qr" -L
<?php
  require_once('fixedfloat.php');
  
  $ff = new FixedFloatApi(YOUR_API_KEY, YOUR_API_SECRET);
  
  $data = array(
    'id'    => 'TESTID',
    'token' => 'TESTTOKENvRB90NOtr397kHY3PJ1VRy2p29HHaN7',
  );
  
  return $ff->qr($data);
?>

Response

A successful response contains an array of objects with information about the name of the QR code and its image in Base64 format.

FieldTypeDescription
codenumberResponse status code. If the request is successful, then the status code is "0", otherwise it is an error
msgstringStatus message
dataArrayArray of objects with information about the name of the QR code and its image in Base64 format
data[].titlestringQR code name
data[].srcstringBase64 encoded QR code image
data[].checkedbooleanIf True, then defined as the default QR code
Example JSON response
{
  "code": 0,
  "msg": "",
  "data": [
    {
      "title": "With amount",
      "src": "data:image/png;base64,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",
      "checked": true,
    },
    {
      "title": "Address",
      "src": "data:image/png;base64,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",
      "checked": false,
    },
  ],
}