Private
MPI
Payer's card verification for participating in 3D-Secure

Scheme of API MPI
Forming a request to API for self-integration:
Example of using SDK:
#!/bin/bash
PUBLIC_KEY='your_public_key'
PRIVATE_KEY='your_private_key'
API_URL='https://www.liqpay.ua/api/request'
JSON="{ 
	\"action\" : \"mpi\",
	\"version\" : 3,
	\"public_key\" : \"${PUBLIC_KEY}\", 
	\"phone\" : \"380950000001\", 
	\"amount\" : \"1\", 
	\"currency\" : \"USD\", 
	\"description\" : \"description text\", 
	\"order_id\" : \"order_id_1\", 
	\"card\" : \"4731195301524634\", 
	\"card_exp_month\" : \"03\", 
	\"card_exp_year\" : \"22\", 
	\"card_cvv\" : \"111\"
}"
# DATA is base64_encode result from JSON string
DATA=$(echo -n ${JSON} | base64)
# SIGNATURE is base64 encode result from sha1 binary hash from concatenate string ${PRIVATE_KEY}${DATA}${PRIVATE_KEY}
SIGNATURE=$(echo -n "${PRIVATE_KEY}${DATA}${PRIVATE_KEY}" | openssl dgst -binary -sha1 | base64)
# REQ is json response from liqpay
REQ=$(curl --silent -XPOST ${API_URL} --data-urlencode data="${DATA}" --data-urlencode signature="${SIGNATURE}")
echo "Result: ${REQ}"
$liqpay = new LiqPay($public_key, $private_key);
$res = $liqpay->api("request", array(
	'action'         => 'mpi',
	'version'        => '3',
	'phone'          => '380950000001',
	'amount'         => '1',
	'currency'       => 'USD',
	'description'    => 'description text',
	'order_id'       => 'order_id_1',
	'card'           => '4731195301524634',
	'card_exp_month' => '03',
	'card_exp_year'  => '22',
	'card_cvv'       => '111'
));
HashMap<String, String> params = new HashMap<String, String>();
params.put("action", "mpi");
params.put("version", "3");
params.put("phone", "380950000001");
params.put("amount", "1");
params.put("currency", "USD");
params.put("description", "description text");
params.put("order_id", "order_id_1"); 
params.put("card", "4731195301524634");
params.put("card_exp_month", "03");
params.put("card_exp_year", "22");
params.put("card_cvv", "111");
LiqPay liqpay = new LiqPay(PUBLIC_KEY, PRIVATE_KEY);
HashMap<String, Object> res = liqpay.api("request", params);    
System.out.println(res.get("status"));
  
liqpay = LiqPay(public_key, private_key)
res = liqpay.api("request", {
	"action"         : "mpi",
	"version"        : "3",
	"phone"          : "380950000001",
	"amount"         : "1",
	"currency"       : "USD",
	"description"    : "description text",
	"order_id"       : "order_id_1",
	"card"           : "4731195301524634",
	"card_exp_month" : "03",
	"card_exp_year"  : "22",
	"card_cvv"       : "111"
})
liqpay = Liqpay::Liqpay.new(
:public_key  => 'public_key',
:private_key => 'private_key'
)
res = liqpay.api("request", {
	:action         => "mpi",
	:version        => "3",
	:phone          => "380950000001",
	:amount         => "1",
	:currency       => "USD",
	:description    => "description text",
	:order_id       => "order_id_1",
	:card           => "4731195301524634",
	:card_exp_month => "03",
	:card_exp_year  => "22",
	:card_cvv       => "111"
})
LiqPay = liqpay:init(PublicKey, PrivateKey),
Res = liqpay:api("request", [
	{<<"action">>,         <<"mpi">>}, 
	{<<"version">>,        <<"3">>}, 
	{<<"phone">>,          <<"380950000001">>}, 
	{<<"amount">>,         <<"1">>}, 
	{<<"currency">>,       <<"USD">>}, 
	{<<"description">>,    <<"description text">>}, 
	{<<"order_id">>,       <<"order_id_1">>}, 
	{<<"card">>,           <<"4731195301524634">>}, 
	{<<"card_exp_month">>, <<"03">>}, 
	{<<"card_exp_year">>,  <<"22">>}, 
	{<<"card_cvv">>,       <<"111">>}
], LiqPay)
var LiqPay = require('liqpay');
var liqpay = new LiqPay(public_key, private_key);
liqpay.api("request", {
	"action"         : "mpi",
	"version"        : "3",
	"phone"          : "380950000001",
	"amount"         : "1",
	"currency"       : "USD",
	"description"    : "description text",
	"order_id"       : "order_id_1",
	"card"           : "4731195301524634",
	"card_exp_month" : "03",
	"card_exp_year"  : "22",
	"card_cvv"       : "111"
}, function( json ){
	console.log( json.status );
});
my $liqpay = Liqpay->new($public_key,$private_key);
my $res = $liqpay->api("request",
	{
	'action'         => 'mpi',
	'version'        => '3',
	'phone'          => '380950000001',
	'amount'         => '1',
	'currency'       => 'USD',
	'description'    => 'description text',
	'order_id'       => 'order_id_1',
	'card'           => '4731195301524634',
	'card_exp_month' => '03',
	'card_exp_year'  => '22',
	'card_cvv'       => '111'
	}
);
Init("my_public_key", "my_private_key")
Api("request", map[string]interface{}{
    "action": "mpi",
    "version": 3,
    "public_key": PublicKey,
    "phone": "380950000001",
    "amount": 1,
    "currency": "UAH",
    "description": "Test payment",
    "order_id": "order_id_1",
    "card": "4731195301524634",
    "card_exp_month": "03", 
    "card_exp_year": "22", 
    "card_cvv": "111",
})
Options for generating data:
Main
Parameter Required Type Description
version Required Number Version API. Current value - 3
public_key Required String Public key - the store identifier. You can get the key in the store settings
action Required String mpi
amount Required Number Payment amount. For example: 5, 7.34
card Required String Card number of the payer
card_cvv Required String CVV/CVV2
card_exp_month Required String Expiry month of the payer's card. For example: 08
card_exp_year Required String Expiry year of the payer's card.For example: 19
currency Required String Payment currency. Possible values: USD, EUR, RUB, UAH
description Required String Payment description.
ip Required String Client IP
order_id Required String Unique purchase ID in your shop. Maximum length is 255 symbols.
action_payment Optional String A parameter defining the payment type. Pass the value of the action parameter of the payment, which will be carried out after passing 3DS. Possible values: pay - payment, hold - blocking funds on the sender’s account, subscribe - regular payment, paydonate - donation, auth - card preauthorization, p2p - transfer from card to card, p2pdebit - payment using p2p debit. Default value is pay - pay
language Optional String Customer's language ru, uk, en
sender_first_name Optional String Payer’s first name
sender_last_name Optional String Payer’s last name
threeDSInfo Required Object Additional data to check a transaction
Параметры 3DS 2.0 (Объект threeDSInfo)
notificationURL Required String The address to which the verification result will be sent.
URL to send CRes or error message. The CRes message is sent from the issuer’s ACS via the cardholder's browser after being verified.
The maximum length is 256 characters.
browserLanguage Required String Payer's browser language.
Value that represents the language of the browser, in the format defined by the IETF BCP47 standard. Returned by the option navigator.language of the user's browser. For example, en-US.
The maximum length is 8 characters.
threeDSRequestorURL Required String The website's URL where the payment is made. This element provides additional data to the 3-D Secure system in case of a problem and should provide contact information.
The maximum length is 2048 characters.
browserScreenHeight Required String Total payer screen height in pixels. Returned by the option screen.height of the user's browser.
The maximum length is 6 characters.
browserColorDepth Required String Value that represents the bit depth of the color palette for displaying images in bits per pixel. Returned by the option screen.colorDepth of the user's browser.
The maximum length is 2 characters.
Allowed values: 1 = 1 bit, 4 = 4 bits, 8 = 8 bits, 15 = 15 bits, 16 = 16 bits, 24 = 24 bits, 32 = 32 bits, 48 = 48 bits.
browserJavascriptEnabled Optional Boolean Parameter describing whether the payer's browser can perform JavaScript. Default true
browserJavaEnabled Optional Boolean A parameter describing whether the payer's browser can perform Java. Default false
browserScreenWidth Required String Total payer screen width in pixels. Returned by the option screen.width of the user's browser.
The maximum length is 6 characters.
browserAcceptHeader Required String The precise value of the HTTP accept headers sent from the payer's browser to the resource where the payment is made.
The maximum length is 2048 characters.
If the value of headers is longer than 2048 characters, the 3DS server will cut off the extra part.
browserTZ Required String Time zone offset between Greenwich and the payer's local time, in minutes. Example of time zone offset values in minutes:
- if UTC is –5 hours, then the value is 300,
- if UTC +5 hours, then the value is –300.
browserUserAgent Required String The precise content of the user-agent HTTP header.
The maximum length is 2048 characters.
If the value of headers is longer than 2048 characters, the 3DS server will cut off the extra part.
Example response:
3DS 1.0
  {
    "status": "success",
    "mpi_req_pareq": "eJxVUe1OwjAUfRWyB1jbMWAjlybIjJI4J1454B/TlKuUsA+6zTCf3lvYRPvrnJN72tNz4XlrEZMn\n1I1FCSlWlfrgdnMvNX8fTyKAx7xwJOwmj/iQcIX2soUuRQ+9wNgPSWj1VV1xKUPlwt10Uowng8\nBNZRyNAuEyl4d2IRjfgI2FmGXGUovQ/jATtB0EWT17aVEQ+B9QQ7ld5fbui6rKWOoi4zcGv29OZSq\n9Rt10VhWGorn5oFdsq0ahyq6/2g2Mr15ad+S9ret0l34/LDhPk2Vw93o9A+YmYKNqlAEXEx4J\nMRBiOpMQ4p90kFlLpjkPhf00T0r0xPxOS/1Kgki3mupVxxOlbPQM8lkWNEGZfzGwS9zFrStW\n19RVvxNX7UlwbkPtiLGL0ETFgzsK6rbFur4T+7fsHPamnMg==",
    "mpi_req_md": "MGUyZDYxMjYDfhKOC00MDI2LWFhMWUOpDFJjNzIyMmDffShZjli",
    "mpi_req_url": "https://acs.bankname.com/mpi",
    "mpi_status": "Y"
  }
  
3DS 2.0 (status C)
  {
    "result": "ok", 
    "mpi_status": "C", 
    "mpi_version": "2.0", 
    "mpi_form": "< form action = 'https://acs4.privatbank.ua/acs/creq' method = 'post' > < input type = 'hidden' name = 'creq' value = 'eyJhY3NUcmFuc0lEIjoiNDJlYmRkOWMtNzU0Zi00YzMwLTg5NDMtNDJhODQzMDY4ZTMwIiwibWVzc2FnZVR5cGUiOiJDUmVxIiwibWVzc2FnZVZlcnNpb24iOiIyLjEuMCIsInRocmVlRFNTZXJ2ZXJUcmFuc0lEIjoiZTc1YmEyOGItNjE0YS00NDE5LWFjMzQtNzkxZDlmMjkwZjE3IiwiY2hhbGxlbmdlV2luZG93U2l6ZSI6IjAyIn0=' / > < /form>", 
    "status": "success",
    "mpi_cres": null,
    "cres": null
  }
  
3DS 2.0 (status A)
  {
    "result": "ok", 
    "mpi_status": "A", 
    "mpi_version": "2.0", 
    "mpi_form": "null", 
    "status": "success",
    "mpi_cres": "eyJhY3NUcmFuc0lEIjoiYTc1ZGYxZGYtZmRhZi00YzcyLTlkOTItYTM1NDUzMzEzODU1IiwibWVzc2FnZVR5cGUiOiJDUmVzIiwibWVzc2FnZVZlcnNpb24iOiIyLjEuMCIsInRocmVlRFNTZXJ2ZXJUcmFuc0lEIjoiYTQyNzQwNmUtZDlmOS00MmI2LTk5MDItOGQ2OTZjMGVkNjJjIiwidHJhbnNTdGF0dXMiOiJBIn0",
    "cres": "eyJhY3NUcmFuc0lEIjoiYTc1ZGYxZGYtZmRhZi00YzcyLTlkOTItYTM1NDUzMzEzODU1IiwibWVzc2FnZVR5cGUiOiJDUmVzIiwibWVzc2FnZVZlcnNpb24iOiIyLjEuMCIsInRocmVlRFNTZXJ2ZXJUcmFuc0lEIjoiYTQyNzQwNmUtZDlmOS00MmI2LTk5MDItOGQ2OTZjMGVkNjJjIiwidHJhbnNTdGF0dXMiOiJBIn0"
  }
  
Response parameters
Parameter Type Description
mpi_req_md String Parameter required for sender authentification on ACS page
mpi_req_pareq String Parameter required for sender authentification on ACS page
mpi_req_url String Issuer bank page url (ACS page) to which customer should be redirected to confirm payment with 3D-Secure
mpi_status String
Values for 3DS version 2.0:
Y, A - additional client verification is not required,
C - additional client verification is required,
N - failed to verify the client. Payment performance is not recommended. The client can be checked with 3DS 1.0,
U – failed to verify the card for participation, client redirection is not required to pass 3-D Secure.
Values for 3DS version 1.0:
N - card does not participate, client redirection for 3D-Secure is not required,
U - failed to verify the card for participation, client redirection for 3D-Secure is not required,
Y - card supports the 3D-Secure service and there will be page of issuing bank in mpi_req_url parameter where mpi_req_pareq and mpi_req_md parameters should be transferred by POST method int he next form:
<form name="MPIform" action='${mpi_req_url}' method="POST">
   <input type="hidden" name="PaReq" value='${mpi_req_pareq}'>
   <input type="hidden" name="MD" value='${mpi_req_md}'>
   <input type="hidden" name="TermUrl" value='${TermUrl}'>
</form>
  
where TermUrl – page address to which issuer will return the answer with PaRes and MD parameters. To make a payment with already passed 3DS you need to transfer mpi_pares and mpi_md, parameters with PaRes and MD values which were received from issuer bank ACS while payment is created.
mpi_version String Returned when the card supports 3DS version 2.0. Value "2.0".
mpi_form String Returned when the card supports 3DS version 2.0. The form to which the client should be sent for authentication. The encrypted verification result will be returned by the issuer to notificationURL in the parameter: cres. To make a payment with passed 3DS, when creating a payment, you need to pass parameter - cres, with the cres value that was received from the issuing bank.
mpi_cres String Parameter required for the sender's authentication. Returned when receiving status Y or N.
status String Payment status.
Available values:
Final payment statuses
failure Failed payment
success Successful payment