FastACH 0.1.8.66

FastACH

.NET library for reading and writing ACH files

Installation

.NET 7.0

PM> Install-Package FastACH

Add namespace to the program

using FastACH;

Usage

Reading ACH file

var reader = new AchFileReader();

var achFile = await reader.Read("ACH.txt");

var achFileWriter = new AchFileWriter();

achFileWriter.WriteToConsole(achFile); // Output to console

Writing ACH file

var achFile = new AchFile()
{
    OneRecord = new FileHeaderRecord()
    {
        ImmediateDestination = "123456789",
        ImmediateOrigin = "123456789",
        FileCreationDate = DateOnly.FromDateTime(DateTime.Now),
        FileCreationTime = TimeOnly.FromDateTime(DateTime.Now),
        FileIdModifier = 'A',
        ImmediateDestinationName = "PNC Bank",
        ImmediateOriginName = "Microsoft Inc.",
        ReferenceCode = "00000000"
    },
    BatchRecordList =
    {
        new BatchRecord()
        {
            BatchHeader = new BatchHeaderRecord()
            {
                ServiceClassCode = 200,
                CompanyName = "companyName",
                CompanyDiscretionaryData = "companyDiscretionary",
                CompanyId = "companyID",
                CompanyEntryDescription = "EntryDescr",
                CompanyDescriptiveDate = new DateOnly(2011, 02, 03),
                EffectiveEntryDate = new DateOnly(2011, 01, 02),
                OriginatingDFIID = "DFINumber"
            },
            TransactionDetailsList =
            {
                new TransactionRecord
                {
                    EntryDetail = new EntryDetailRecord()
                    {
                        TransactionCode = 22,
                        ReceivingDFIID = 12345678,
                        CheckDigit = '9',
                        DFIAccountNumber = "1313131313",
                        Amount = 22M,
                        ReceiverIdentificationNumber = "ID Number",
                        ReceiverName = "ID Name",
                        DiscretionaryData = "Desc Data",
                        AddendaRecordIndicator = true,
                    },
                    Addenda = new AddendaRecord()
                    {
                        AddendaInformation = "Monthly bill"
                    }
                },
                new TransactionRecord()
                {
                    EntryDetail = new EntryDetailRecord()
                    {
                        TransactionCode = 27,
                        ReceivingDFIID = 12345678,
                        CheckDigit = '9',
                        DFIAccountNumber = "1313131313",
                        Amount = 27M,
                        ReceiverIdentificationNumber = "ID Number",
                        ReceiverName = "ID Name",
                        DiscretionaryData = "Desc Data",
                        AddendaRecordIndicator = false,
                    },
                    Addenda = null
                }
            }
        }
    }
};

var writer = new AchFileWriter();

await writer.WriteToFile(achFile, "ACH.txt");

Perfomance results

I created a benchmark to compare reading performance between FastACH and very popular ChoETL.Nacha library.

BenchmarkDotNet v0.13.12, Windows 11 (10.0.22621.3007/22H2/2022Update/SunValley2) 13th Gen Intel Core i7-1370P, 1 CPU, 20 logical and 14 physical cores .NET SDK 8.0.100 [Host] : .NET 7.0.15 (7.0.1523.57226), X64 RyuJIT AVX2 DefaultJob : .NET 7.0.15 (7.0.1523.57226), X64 RyuJIT AVX2