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Description:

emvqrcode

a dart package for decode and encode EMVCO #

information about EMVCO
www.emvco.com

Usage #
Install #
Run this command:

// flutter
$> flutter pub add emvqrcode

// or for dart
$> dart pub add emvqrcode

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pubspec.yaml:
dependencies:
emvqrcode: ^1.0.5
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MPM #
Decode
cost emvqr = "00020001021203200002IT0103abc0203def04200002IT0103abc0203def624601050qwea1006tax id1103cha1202135003123510312364410002LA0102MW0209Vientaine0304asfg0404asfg6503bbc6603bbb89230003abs0104qw120204qw1281230003sdf0504ffff0604ffff63042E4E";
final emvdecode = EMVMPM.decode(emvqr);

// print decode json model
debugPrint("emv decode ------> ${emvdecode.toJson()}");
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Generate
final emv = EMVQR();

emv.setPayloadFormatIndicator("00");

emv.setPointOfInitiationMethod("12");

/// merchant account information
final mAccountInfo = MerchantAccountInformation();
mAccountInfo.setGloballyUniqueIdentifier("IT");
mAccountInfo.addPaymentNetworkSpecific(id: "01", value: "abc");
mAccountInfo.addPaymentNetworkSpecific(id: "02", value: "def");
emv.addMerchantAccountInformation(id: "03", value: mAccountInfo);

/// merchant 2 account information
final mAccountInfo2 = MerchantAccountInformation();
mAccountInfo2.setGloballyUniqueIdentifier("IT");
mAccountInfo2.addPaymentNetworkSpecific(id: "01", value: "abc");
mAccountInfo2.addPaymentNetworkSpecific(id: "02", value: "def");
emv.addMerchantAccountInformation(id: "04", value: mAccountInfo2);

// Additional Field
final additionalData = AdditionalDataFieldTemplate();
additionalData.setBillNumber("0qwea");
additionalData.setMerchantTaxID("tax id");
additionalData.setMerchantChannel("cha");
additionalData.addRfuForEMVCo(id: "12", value: "00");
additionalData.addRfuForEMVCo(id: "13", value: "13");
additionalData.addPaymentSystemSpecific(id: "50", value: "123");
additionalData.addPaymentSystemSpecific(id: "51", value: "123");
emv.setAdditionalDataFieldTemplate(additionalData);

// merchant info language
final mInfoLang = MerchantInformationLanguageTemplate();
mInfoLang.setLanguagePreferencer("LA");
mInfoLang.setMerchantCity("Vientaine");
mInfoLang.setMerchantName("MW");
mInfoLang.addRfuForEMVCo(id: "03", value: "asfg");
mInfoLang.addRfuForEMVCo(id: "04", value: "asfg");
emv.setMerchantInformationLanguageTemplate(mInfoLang);

emv.addRfuForEMVCo(id: "65", value: "bbc");
emv.addRfuForEMVCo(id: "66", value: "bbb");

final unreserved1 = UnreservedTemplate();
unreserved1.setGloballyUniqueIdentifier("abs");
unreserved1.addContextSpecificData(id: "01", value: "qw12");
unreserved1.addContextSpecificData(id: "02", value: "qw12");
emv.addUnreservedTemplate(id: "89", value: unreserved1);

// encode data to emvCo
final emvEncode = EMVMPM.encode(emv);

// print encode json model
debugPrint("emv encode -------> ${emvEncode.toJson()}");

// {emvqr: 00020001021203200002IT0103abc0203def04200002IT0103abc0203def625201050qwea1006tax id1103cha1202001302135003123510312364410002LA0102MW0209Vientaine0304asfg0404asfg6503bbc6603bbb89230003abs0104qw120204qw126304735A, error: null}
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Verify CRC EMVCO #
if you need to verify whether data in emvCo had changed or not you can use this method.

final wrongData =
"00020101021138670016A00526628466257701082771041802030010324ZPOSUALNJBWWVYSEIRIESGFE6304D1B9";

// verify emvqr
final verified = verifyEmvQr(wrongData);

if(verified) {
debugPrint("emvCo corrected}");
}else {
debugPrint("emvCo incorrect}");
}

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CPM #
Generate #

final qr = CPM();

qr.setDataPayloadFormatIndicator("CPV01");

final appTemplate1 = ApplicationTemplate();
appTemplate1.setBerTvl(
BerTvl(
dataApplicationDefinitionFileName: "A0000000555555",
dataApplicationLabel: "Product1"),
);
qr.addApplicationTemplate(appTemplate1);

final appTemplate2 = ApplicationTemplate();
appTemplate2.setBerTvl(BerTvl(
dataApplicationDefinitionFileName: "A0000000666666",
dataApplicationLabel: "Product2"));
qr.addApplicationTemplate(appTemplate2);

final cdt = CommonDataTemplate();
cdt.setBerTvl(
BerTvl(
dataApplicationPan: "1234567890123458",
dataCardholderName: "CARDHOLDER/EMV",
dataLanguagePreference: "ruesdeen"),
);
cdt.addCommonDataTransparentTemplates(
BerTvl(
dataIssuerApplicationData: '06010A03000000',
dataApplicationCryptogram: "584FD385FA234BCC",
dataApplicationTransactionCounter: "0001",
dataUnpredictableNumber: "6D58EF13",
),
);
qr.addCommonDataTemplate(cdt);

final cpm = EMVCPM();

// generate cpm emvCo
final value = cpm.generatePayload(qr);

debugPrint("cpm emvCo -------> $value");

// cpm emvCo -------> hQVDUFYwMWETTwegAAAAVVVVUAhQcm9kdWN0MWETTwegAAAAZmZmUAhQcm9kdWN0MmJJWggSNFZ4kBI0WF8gDkNBUkRIT0xERVIvRU1WXy0IcnVlc2RlZW5kIZ8QBwYBCgMAAACfJghYT9OF+iNLzJ82AgABnzcEbVjvEw==

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TODO #

add decode CPM
Re-write API generate CPM EMVCO

Credits #

emv-qrcode