From 293c822c86ad0a85cb8befc4642b9d1a77f2e056 Mon Sep 17 00:00:00 2001
From: Terry Yiu <git@tyiu.xyz>
Date: Thu, 10 Sep 2026 12:24:13 +0300
Subject: [PATCH] Reject decimal input in the manual "currency to Sats" field
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

It was using the decimal sanitizer/keyboard, same as the rate field
next to it — but Sats are indivisible, so this one should behave like
the existing Sats amount field: integers only, numeric keypad.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FXcrACM5sok3M1KQJ8kByy
---
 iosApp/iosApp/ContentView.swift                               | 4 ++--
 .../commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceScreen.kt    | 2 +-
 .../commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceViewModel.kt | 3 ++-
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/iosApp/iosApp/ContentView.swift b/iosApp/iosApp/ContentView.swift
index 7c7f882..f44e724 100644
--- a/iosApp/iosApp/ContentView.swift
+++ b/iosApp/iosApp/ContentView.swift
@@ -115,8 +115,8 @@ struct ContentView: View {
                         NumericField(
                             placeholder: "",
                             value: state.manualSatsPerCurrencyInput,
-                            keyboardType: .decimalPad,
-                            sanitize: sanitizeDecimalInput,
+                            keyboardType: .numberPad,
+                            sanitize: sanitizeIntegerInput,
                             onChange: { viewModel.onManualSatsPerCurrencyChanged($0) },
                             alignment: .trailing
                         )
diff --git a/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceScreen.kt b/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceScreen.kt
index 5f7c875..036ae9e 100644
--- a/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceScreen.kt
+++ b/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceScreen.kt
@@ -214,7 +214,7 @@ fun PriceScreen(
                             value = state.manualSatsPerCurrencyInput,
                             onValueChange = viewModel::onManualSatsPerCurrencyChanged,
                             label = { Text(stringResource(MR.strings.currency_to_sats, state.defaultCurrencyCode)) },
-                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Number),
                             singleLine = true,
                             visualTransformation = DigitGroupingTransformation,
                             modifier = Modifier.fillMaxWidth(),
diff --git a/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceViewModel.kt b/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceViewModel.kt
index caa605d..039a1ba 100644
--- a/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceViewModel.kt
+++ b/shared/src/commonMain/kotlin/xyz/tyiu/satsprice/ui/PriceViewModel.kt
@@ -294,7 +294,8 @@ class PriceViewModel(
     }
 
     fun onManualSatsPerCurrencyChanged(value: String) {
-        val sanitized = sanitizeDecimalInput(value)
+        // Sats are indivisible — unlike the rate field, this one takes whole numbers only.
+        val sanitized = sanitizeIntegerInput(value)
         val parsedSats = sanitized.toBigDecimalOrNull()
         val rate = parsedSats?.let { sats -> CurrencyConverter.satsPerCurrencyUnit(sats) }
         manualSource.rate = rate