Module types 

Request/result/config data model (serde), mirroring the reference types/client.ts field-for-field. Enums serialize to the same JSON string unions as the TS API and struct fields use camelCase, so the model maps cleanly onto the Tauri IPC. Absent optional fields deserialize to None; a None serializes as JSON null (the TS side treats null/absent equivalently for these optional fields).

Structs

CardVerificationRequest

Card-verification request (H).

CardVerificationResult

Card-verification result.

CloseSessionResult

Close-session result (C).

CurrencyExchange

DCC / currency-exchange block (only meaningful when applied == true).

Ecr17Config

Client/session configuration.

IncrementalAuthRequest

Incremental pre-auth request (i).

PaymentRequest

Payment / extended-payment / pre-auth request.

PaymentResult

Payment / extended-payment / closure result.

PosStatusResponse

Terminal status response (s).

PreAuthClosureRequest

Pre-auth closure request (c).

PreAuthRequest

Pre-auth request (p).

PreAuthResult

Pre-auth / incremental result.

ProgressEvent

Progress-update message shown on the ECR display during a procedure (SOH frame).

ReceiptLine

A single receipt line streamed by the terminal (S message) when ECR printing is on.

ReversalRequest

Reversal request (S).

ReversalResult

Reversal result.

TokenizationRequest

Tokenization additional-data request (U).

TotalsResult

Totals result (T).

VasResult

VAS result (K).

Enums

CardType

Card category reported by the terminal (response “Card type”: 1/2/3).

ConnectionState

Transport connection lifecycle.

PaymentCardType

Requested card handling for a payment (request “Payment type”: 0..3).

TokenizationService

Tokenization service requested alongside a payment/preauth/verification (command U).

TransactionEntryMode

How the card was read (response “Transaction type”: ICC/MAG/MAN/CLM/CLI).

TransactionOutcome

Normalized transaction outcome (mapped from the raw 2-digit result code): "00" -> ok, "01" -> ko, "05" -> cardNotPresent, "09" -> unknownTag.

Functions

pos_terminal_status_message

Human-readable message for a PosTerminalStatus.

Type Aliases

PosTerminalStatus

POS terminal status code (response s). Meanings are defined for 0..=6; any other value (including the -1 the parser uses for “not reported”) maps to “Unknown”.