Epson-fiscal-printer NPM

Fiscal Printer

In order to easily interface with different brands of fiscal printers and use their same functions, this module defines a unified interactive data structure and interfaces. By implementing these interfaces to interact with a certain certain brand of fiscal printer.

Interactive data structure

Fiscal.Receipt

Name	Desc
operator	to identify the operator
sales	sale items or cancel sale items
lottery	national lottery unique customer code
personalTaxCode
refunds	refund items or cancel refunds
subtotals
payments
barCode
qrCode
graphicCoupon
openDrawer

Fiscal.Report

Name	Desc
type	report type: daily financial report or daily fiscal closure or both
operator
timeout
openDrawer

Fiscal.Cancel

Name	Desc
type	void or redund
zRepNum	daily fiscal closure report number
docNum	document number
date
fiscalNum	fiscal serial number of the printer
operator

Fiscal.Command

Name	Desc
code	command type
data	data required by the command

Commands

Command	Desc	Support
OPEN_DRAWER	value: 0, open drawer	Epson / Custom
QUERY_PRINTER_STATUS	value 1, query printer status	Epson / Custom
RESET_PRINTER	value 2, reset printer	Epson / Custom
GET_NATIVE_CODE_FUNCTION	value 3, use printer native code command	Epson / Custom
GET_INFO	value 4, get printer device info	Custom Only

Interfaces

Epson	Custom
`printFiscalReceipt(receipt: Fiscal.Receipt)`	`printFiscalReceipt(receipt: FPrinterCustom.Receipt)`
`printFiscalReport(report: Fiscal.Report)`	`printFiscalReport(report: FPrinterCustom.Report)`
`printCancel(cancel: Fiscal.Cancel)`	`printCancel(cancel: FPrinterCustom.Cancel)`
`executeCommand(...commands: Fiscal.Command[])`	`executeCommand(...commands: FPrinterCustom.Command[])`

Usage

Epson Fiscal ePOS-Print XML Examples

// Create a client
const fprinter: FPrinter.Client = new EpsonXmlHttpClient({
    host: '192.168.1.1',
    deviceId: 'local_printer',
    timeout: 10000
});

// Fiscal receipt
await client.printFiscalReceipt({
    sales: [
        {
            type: Fiscal.ItemType.HOLD,
            description: 'A',
            quantity: 1,
            unitPrice: 5
        },
        {
            type: Fiscal.ItemType.HOLD,
            description: 'B',
            quantity: 2,
            unitPrice: 2.5
        },
        {
            type: Fiscal.ItemType.HOLD,
            description: 'C',
            quantity: 3,
            unitPrice: 3
        },
    ],
    payments: [
        {
            description: 'Payment in cash',
            payment: 19
        }
    ]
});

// Fiscal Report
await client.printFiscalReport({
    type: Fiscal.ReportType.DAILY_FISCAL_CLOUSE,
});

Custom Protocol Examples
Note: unit quantity multiplied by 1000, unit price multiplied by 1000, include the discount, payment

// Create a client
const fprinter: FPrinterCustom.Client = new CustomXmlHttpClient({
    host: '192.168.1.1',
    fiscalId: 'STMTE500432', // 11 digits
});

// Fiscal receipt
await fprinter.printFiscalReceipt({
    sales: [
        {
            type: Fiscal.ItemType.HOLD,
            description: 'A',
            quantity: 1 * 1000,
            unitPrice: 5 * 100
        },
        {
            type: Fiscal.ItemType.HOLD,
            description: 'B',
            quantity: 2 * 1000,
            unitPrice: 2.5 * 100
        },
        {
            type: Fiscal.ItemType.HOLD,
            description: 'C',
            quantity: 3 * 1000,
            unitPrice: 3 * 100
        },
    ],
    payments: [
        {
            description: 'Payment in cash',
            payment: 19 * 100,
            paymentType: 1
        }
    ]
});

// Fiscal Refund
// step 1 request to make sure the annulment is possible, if responseBuf === 1 then execute step 2 
await fprinter.printCancel({
    docRefZ: '0021',
    docRefNumber: '0034',
    docDate: '011022', // DDMMYY
    printPreview: CustomProtocol.EnableType.DISABLE,
    fiscalSerial: 'STMTE500432',
    checkOnly: CustomProtocol.EnableType.ABLE, 
    codLottery: 'ASDSFES7',
});

// step 2 to proceed with the actual void request
await fprinter.printCancel({
    docRefZ: '0021',
    docRefNumber: '0034',
    docDate: '011022', // DDMMYY,
    printPreview: CustomProtocol.EnableType.DISABLE,
    fiscalSerial: 'STMTE500432',
    checkOnly: CustomProtocol.EnableType.DISABLE,
    codLottery: 'ASDSFES7',
});

// Fiscal Report
await fprinter.printFiscalReport({
    type: CustomProtocol.ReportType.DAILY_FISCAL_CLOUSE,
});

// Fiscal Command
await fprinter.executeCommand({
    code: CustomProtocol.CommandCode.OPEN_DRAWER
});