Add iOS Simulator support

ios/flutter_libepiccash.podspec

@@ -16,7 +16,10 @@ A new Flutter plugin project.
   s.public_header_files = 'Classes**/*.h'
   s.source_files = 'Classes/**/*'
   s.static_framework = true
-  s.vendored_libraries = 'libs/*.a'
+  # epiccash.xcframework carries arm64 device and arm64 simulator slices.
+  # Produced by scripts/ios/build_all.sh or download.sh (device slice) plus
+  # scripts/ios/build_sim.sh (simulator slice + XCFramework packaging).
+  s.vendored_frameworks = 'libs/epiccash.xcframework'
   s.dependency 'Flutter'
   s.library = 'sqlite3', 'c++'
   s.platform = :ios, '9.0'

scripts/ios/build_sim.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+# Build the iOS Simulator (arm64) slice of libepic_cash_wallet and package it
+# together with the existing device slice (ios/libs/libepic_cash_wallet.a,
+# produced by build_all.sh or download.sh) into an XCFramework.
+set -e
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PLUGIN_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+DEVICE_LIB="${PLUGIN_ROOT}/ios/libs/libepic_cash_wallet.a"
+if [ ! -f "${DEVICE_LIB}" ]; then
+    echo "Error: ${DEVICE_LIB} not found."
+    echo "Run scripts/ios/build_all.sh or scripts/ios/download.sh first to produce the device slice."
+    exit 1
+fi
+
+mkdir -p "${SCRIPT_DIR}/build"
+echo ''$(git log -1 --pretty=format:"%H")' '$(date) >> "${SCRIPT_DIR}/build/git_commit_version.txt"
+
+VERSIONS_FILE="${PLUGIN_ROOT}/lib/git_versions.dart"
+EXAMPLE_VERSIONS_FILE="${PLUGIN_ROOT}/lib/git_versions_example.dart"
+if [ ! -f "$VERSIONS_FILE" ]; then
+    cp "$EXAMPLE_VERSIONS_FILE" "$VERSIONS_FILE"
+fi
+COMMIT=$(git log -1 --pretty=format:"%H")
+OS="IOS"
+sed -i '' '/\/\*${OS}_VERSION/c\'$'\n''/\*${OS}_VERSION\*\/ const ${OS}_VERSION = "'"$COMMIT"'";' "$VERSIONS_FILE"
+
+# Copy the rust sources next to this script the same way build_all.sh does.
+rm -rf "${SCRIPT_DIR}/build/rust"
+cp -r "${PLUGIN_ROOT}/rust" "${SCRIPT_DIR}/build/rust"
+cd "${SCRIPT_DIR}/build/rust"
+
+rustup target add aarch64-apple-ios-sim
+
+export IPHONEOS_DEPLOYMENT_TARGET=15.0
+export CARGO_TARGET_AARCH64_APPLE_IOS_SIM_RUSTFLAGS="-C link-arg=-mios-simulator-version-min=15.0"
+cargo build --release --target aarch64-apple-ios-sim
+
+# Merge librandomx.a (simulator build) with libepic_cash_wallet.a.
+SIM_LIB="target/aarch64-apple-ios-sim/release/libepic_cash_wallet.a"
+RANDOMX_LIB=$(find target/aarch64-apple-ios-sim/release/build -name "librandomx.a" | head -n 1)
+if [ -f "$RANDOMX_LIB" ]; then
+    echo "Found RandomX library at: $RANDOMX_LIB"
+    libtool -static -o target/aarch64-apple-ios-sim/release/libepic_cash_wallet_combined.a \
+        "$SIM_LIB" \
+        "$RANDOMX_LIB"
+    SIM_LIB=target/aarch64-apple-ios-sim/release/libepic_cash_wallet_combined.a
+else
+    echo "Warning: librandomx.a not found, using libepic_cash_wallet.a only"
+fi
+
+# XCFramework slices must share the same library filename as the device
+# slice (libepic_cash_wallet.a); stage the simulator slice accordingly.
+SIM_STAGING=target/aarch64-apple-ios-sim/release/sim_staging
+rm -rf "$SIM_STAGING"
+mkdir -p "$SIM_STAGING"
+cp "$SIM_LIB" "$SIM_STAGING/libepic_cash_wallet.a"
+
+# Package device + simulator slices as an XCFramework (both are arm64, so
+# lipo cannot combine them).
+rm -rf "${PLUGIN_ROOT}/ios/libs/epiccash.xcframework"
+xcodebuild -create-xcframework \
+    -library "${DEVICE_LIB}" -headers "${PLUGIN_ROOT}/ios/include" \
+    -library "${SIM_STAGING}/libepic_cash_wallet.a" -headers "${PLUGIN_ROOT}/ios/include" \
+    -output "${PLUGIN_ROOT}/ios/libs/epiccash.xcframework"
+
+echo "Done: ${PLUGIN_ROOT}/ios/libs/epiccash.xcframework"

scripts/ios/download.sh

@@ -30,3 +30,13 @@ download_and_verify "libepic_cash_wallet.h"
 mkdir -p "$LIB_ROOT/ios/libs" "$LIB_ROOT/ios/include"
 cp "$TMPDIR/libepic_cash_wallet-ios-aarch64.a" "$LIB_ROOT/ios/libs/libepic_cash_wallet.a"
 cp "$TMPDIR/libepic_cash_wallet.h"             "$LIB_ROOT/ios/include/libepic_cash_wallet.h"
+
+# Release artifacts are device-only; wrap the device slice in an XCFramework
+# so the podspec's vendored_frameworks entry resolves. Simulator consumers
+# must additionally run scripts/ios/build_sim.sh.
+PLUGIN_ROOT="$(cd "$LIB_ROOT" && pwd)"
+rm -rf "$PLUGIN_ROOT/ios/libs/epiccash.xcframework"
+xcodebuild -create-xcframework \
+    -library "$PLUGIN_ROOT/ios/libs/libepic_cash_wallet.a" \
+    -headers "$PLUGIN_ROOT/ios/include" \
+    -output "$PLUGIN_ROOT/ios/libs/epiccash.xcframework"