fix: update WASM build target to wasm32v1-none for Rust 1.84+

Rust 1.82+ enabled reference-types and multi-value on wasm32-unknown-unknown
which are not supported by the Soroban host environment.
Switch to wasm32v1-none which is the correct target from Rust 1.84+.

Author: MarcusDavidG

.github/workflows/ci.yml

@@ -12,23 +12,25 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - name: Install Rust wasm32 target
-        run: rustup target add wasm32-unknown-unknown
+      - name: Install Rust 1.84+ and wasm32v1-none target
+        run: |
+          rustup toolchain install stable
+          rustup target add wasm32v1-none
 
       - name: Run tests
         run: cargo test
 
       - name: Build WASM
-        run: cargo build --release --target wasm32-unknown-unknown
+        run: cargo build --release --target wasm32v1-none
 
       - name: Install Stellar CLI
         run: cargo install --locked stellar-cli --features opt
 
       - name: Optimize WASM
-        run: stellar contract optimize --wasm target/wasm32-unknown-unknown/release/sharpy.wasm
+        run: stellar contract optimize --wasm target/wasm32v1-none/release/sharpy.wasm
 
       - name: Upload optimized WASM artifact
         uses: actions/upload-artifact@v4
         with:
           name: sharpy.optimized.wasm
-          path: target/wasm32-unknown-unknown/release/sharpy.optimized.wasm
+          path: target/wasm32v1-none/release/sharpy.optimized.wasm

Makefile

@@ -1,11 +1,11 @@
 .PHONY: build optimize test deploy-testnet deploy-mainnet
 
-WASM=target/wasm32-unknown-unknown/release/sharpy.wasm
-OPTIMIZED=target/wasm32-unknown-unknown/release/sharpy.optimized.wasm
+WASM=target/wasm32v1-none/release/sharpy.wasm
+OPTIMIZED=target/wasm32v1-none/release/sharpy.optimized.wasm
 TESTNET_ID=CAYTIFPD6RFWVHMK5SPPUUIWWAAANHKOJB6GOAJS5SR5MBKZMEY2UODZ
 
 build:
-	cargo build --release --target wasm32-unknown-unknown
+	cargo build --release --target wasm32v1-none
 
 optimize: build
 	stellar contract optimize --wasm $(WASM)