[ABW-3433] Fix Manifest Crash

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sargon"
-version = "1.0.14"
+version = "1.0.15"
 edition = "2021"
 build = "build.rs"
 

apple/Sources/Sargon/Extensions/Swiftified/RET/TransactionManifest+Swiftified.swift

@@ -76,8 +76,8 @@ extension TransactionManifest {
 
     public func modify(
         addGuarantees guarantees: [TransactionGuarantee]
-    ) -> Self {
-        modifyManifestAddGuarantees(
+    ) throws -> Self {
+        try modifyManifestAddGuarantees(
             manifest: self,
             guarantees: guarantees
         )

apple/Tests/TestCases/RET/ManifestBuilding/ManifestBuildingTests.swift

@@ -175,7 +175,7 @@ final class ManifestBuildingTests: Test<TransactionManifest> {
 			}
 			XCTAssertFalse(hasLockFee())
 			let fee: Decimal192 = 531
-			manifest = manifest.modify(lockFee: fee, addressOfFeePayer: addressOfFeePayer)
+			manifest = try manifest.modify(lockFee: fee, addressOfFeePayer: addressOfFeePayer)
 			XCTAssertTrue(hasLockFee())
 			XCTAssert(manifest.description.contains(addressOfFeePayer.address))
 		}
@@ -198,7 +198,7 @@ final class ManifestBuildingTests: Test<TransactionManifest> {
 		)
 
 		XCTAssertFalse(manifest.description.contains(guarantee.amount.description))
-		manifest = manifest.modify(addGuarantees: [guarantee])
+		manifest = try manifest.modify(addGuarantees: [guarantee])
 		XCTAssertTrue(manifest.description.contains(guarantee.amount.description))
 
 	}

src/core/error/common_error.rs

@@ -492,6 +492,11 @@ pub enum CommonError {
 
     #[error("Invalid RadixConnectPurpose, bad value: {bad_value}")]
     InvalidRadixConnectPurpose { bad_value: String } = 10137,
+
+    #[error(
+        "Transaction Guarantee's 'instruction_index' is out of bounds, the provided manifest contains #{count}, but an 'instruction_index' of {index} was specified."
+    )]
+    TXGuaranteeIndexOutOfBounds { index: u64, count: u64 } = 10138,
 }
 
 #[uniffi::export]