refactor(core): compute crypto primitives with SharedCoreKit

.github/workflows/vectors.yml

@@ -5,9 +5,10 @@ name: Cross-platform vector gate
 # two apps compute keys, signatures, and on-chain amounts in parallel Swift and
 # Kotlin implementations; these vectors are what keeps the answers identical.
 #
-# Two packages because they cannot share a deployment target: CodeCurves is
-# plain C and builds for the host, while FlipcashCore declares only iOS and its
-# transitive deps (BigDecimal, grpc/nio) will not resolve for a macOS build.
+# Two packages because they cannot share a deployment target: FlipcashCore's
+# transitive deps (BigDecimal, grpc/nio) pull a macOS floor that CrossPlatformVectors
+# does not want. Both run on a simulator — the ed25519 under test moved from a
+# host-buildable C package to the shared Kotlin XCFramework, which ships iOS only.
 
 on:
   pull_request:
@@ -39,17 +40,25 @@ jobs:
           fi
           xcodebuild -version
 
+      # Simulator model names turn over with each runner image, so pick whatever
+      # iPhone is installed rather than naming one.
+      - name: Pick a simulator
+        id: sim
+        run: |
+          set -euo pipefail
+          UDID=$(xcrun simctl list devices available -j | python3 -c "import json,sys; d=json.load(sys.stdin)['devices']; print(next(x['udid'] for r in sorted(d, reverse=True) for x in d[r] if x['name'].startswith('iPhone')))")
+          echo "udid=$UDID" >> "$GITHUB_OUTPUT"
+
       - name: Ed25519 vectors
         working-directory: CrossPlatformVectors
-        run: swift test
+        run: |
+          xcodebuild test -scheme CrossPlatformVectors-Package \
+            -destination "platform=iOS Simulator,id=${{ steps.sim.outputs.udid }}" \
+            -quiet
 
       - name: FlipcashCore vectors
         working-directory: FlipcashCoreVectors
         run: |
-          set -euo pipefail
-          # Simulator model names turn over with each runner image, so pick
-          # whatever iPhone is installed rather than naming one.
-          UDID=$(xcrun simctl list devices available -j | python3 -c "import json,sys; d=json.load(sys.stdin)['devices']; print(next(x['udid'] for r in sorted(d, reverse=True) for x in d[r] if x['name'].startswith('iPhone')))")
           xcodebuild test -scheme FlipcashCoreVectors-Package \
-            -destination "platform=iOS Simulator,id=$UDID" \
+            -destination "platform=iOS Simulator,id=${{ steps.sim.outputs.udid }}" \
             -quiet

Code.xcodeproj/project.pbxproj

@@ -95,7 +95,6 @@
 		9A516F892D9B12EA00AF478B /* FlipcashTests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FlipcashTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		9A516F932D9B12EA00AF478B /* FlipcashUITests.xctest */ = {isa = PBXFileReference; explicitFileType = wrapper.cfbundle; includeInIndex = 0; path = FlipcashUITests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		9A592D762B17AF5500735BB0 /* base.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = base.xcconfig; sourceTree = "<group>"; };
-		9AA197072CE51ABB00FE1703 /* CodeCurves */ = {isa = PBXFileReference; lastKnownFileType = wrapper; path = CodeCurves; sourceTree = "<group>"; };
 		9ABDD1962D9D7C2E006B6CDA /* FlipcashAPI */ = {isa = PBXFileReference; lastKnownFileType = wrapper; path = FlipcashAPI; sourceTree = "<group>"; };
 		9AD5E64B25F2BF3E007388AE /* opencv2.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = opencv2.framework; sourceTree = "<group>"; };
 		A361ABDE10578BE8E8859E31 /* NotificationContent.entitlements */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.plist.entitlements; path = NotificationContent.entitlements; sourceTree = "<group>"; };
@@ -275,7 +274,6 @@
 		9AED116C258BE3AF0088D902 /* Packages */ = {
 			isa = PBXGroup;
 			children = (
-				9AA197072CE51ABB00FE1703 /* CodeCurves */,
 				9A43F0102D9C357900CE8817 /* FlipcashCore */,
 				9ABDD1962D9D7C2E006B6CDA /* FlipcashAPI */,
 				9A0C7F8E2DA0379A0018C7CB /* FlipcashUI */,
@@ -1768,7 +1766,7 @@
 			repositoryURL = "https://github.com/code-payments/flipcash-shared-core-spm";
 			requirement = {
 				kind = upToNextMinorVersion;
-				minimumVersion = 0.3.1;
+				minimumVersion = 0.4.0;
 			};
 		};
 		9ACE172927E6287C00ACA047 /* XCRemoteSwiftPackageReference "mixpanel-swift" */ = {