# PayMV QR Screen

Generates a receive-payment PayMV / Favara QR code. **Generation only** — the send/scan side of PayMV lives in `TransferFragment` via `newInstanceWithAutoScan()` and the [QR scanner](25-qr-scanner.md).

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## Fragment — `PayMvQrFragment`

A single screen (no tabs). Re-renders the QR live as the user edits the form.

### Fields

| Field | Source / behaviour |
|---|---|
| Source account dropdown | `viewModel.accounts`, filtered to non-card MVR accounts (MIB and BML USD currently excluded — both flagged as TODO in source). Defaults to `CredentialStore.getDefaultAccountNumber()` when set |
| Amount (`etAmount`) | Optional. Blank → open-amount QR |
| Reference (`etReference`) | Free-text purpose; defaults to `paymvqr_reference_default` if blank — written to tag 62→08 |
| Include phone (`switchIncludePhone`) | When on, writes the saved BML / Fahipay mobile to sub-tag 26→05 (auto-prefixed `+960` if 7-digit local) |

### Generation

`buildQrPayload()` assembles a decimal TLV payload per the [PayMV QR Format](18-paymv-qr-format.md):

1. Tag 26 container: GUI (`mv.favara.mpqr`), acquirer BIC, account number, optional mobile, `IPAY`
2. Acquirer BIC is derived from the source account's bank: `MALBMVMV` (BML) / `MADVMVMV` (MIB) / `FAHIMVMV` (Fahipay)
3. Tag 62 container: random 9-char reference + the purpose text
4. Tag 80 container: GUI + ISO timestamp
5. Appends `"6304"` and computes CRC-16/CCITT-FALSE over the full string

The rendered card image (bank-styled background plus QR) is shown in-place.

### Actions

- **Share** (`btnShare`) — exports the rendered card via `FileProvider` + `ACTION_SEND`
- **Save** (`btnSave`, `PayMvQrFragment.kt:78`) — writes the PNG to `MediaStore.Images` / `Pictures/`

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[← OTP Screen](10-otp-screen.md)     **Next →** [BML QR Pay](12-bml-qr-pay.md)