moov-io/iso8583 example

main.go

package main

import (
	"github.com/moov-io/iso8583"
	"github.com/moov-io/iso8583/encoding"
	"github.com/moov-io/iso8583/field"
	"github.com/moov-io/iso8583/prefix"
)

func NewSpec() *iso8583.MessageSpec {
	return &iso8583.MessageSpec{
		Fields: map[int]field.Field{
			0: field.NewString(&field.Spec{
				Length:      4,
				Description: "Message Type Indicator",
				Enc:         encoding.ASCII,
				Pref:        prefix.ASCII.Fixed,
			}),
			1: field.NewBitmap(&field.Spec{
				Description: "Bitmap",
				Enc:         encoding.Binary,
				Pref:        prefix.Binary.Fixed,
			}),
			2: field.NewString(&field.Spec{
				Length:      19,
				Description: "Primary Account Number",
				Enc:         encoding.BCD,
				Pref:        prefix.BCD.LL,
			}),
			//3: field.NewNumeric(&field.Spec{
			//	Length:      6,
			//	Description: "Processing Code",
			//	Enc:         encoding.BCD,
			//	Pref:        prefix.BCD.Fixed,
			//}),
			//4: field.NewNumeric(&field.Spec{
			//	Length:      12,
			//	Description: "Amount, Transaction",
			//	Enc:         encoding.BCD,
			//	Pref:        prefix.BCD.Fixed,
			//	//Pad:         padding.Left('0'),
			//}),
			//6: field.NewNumeric(&field.Spec{
			//	Length:      12,
			//	Description: "Amount, Cardholder Billing",
			//	Enc:         encoding.BCD,
			//	Pref:        prefix.BCD.Fixed,
			//	Pad:         padding.Left('0'),
			//}),
			//7: field.NewNumeric(&field.Spec{
			//	Length:      10,
			//	Description: "Transmission Date and Time",
			//	Enc:         encoding.BCD,
			//	Pref:        prefix.BCD.Fixed,
			//	Pad:         padding.Left('0'),
			//}),
			// and so on
			//
		},
	}
}

func main() {
	spec := NewSpec()

	message := iso8583.NewMessage(spec)

	message.MTI("0100")
	message.Field(2, "4242424242424242")
	message.Field(3, "123456")
	message.Field(4, "100")
	// set your values
	packed, err := message.Pack()
	if err != nil {
		panic(err)
	}

	// send packed via the network
}