Implement transient get/set bytes32 hostios

.github/workflows/smoke-test.yml

@@ -14,6 +14,7 @@ jobs:
     name: 'Test (Smoke)(${{ matrix.cfg_release_channel }})'
     env:
       CFG_RELEASE_CHANNEL: ${{ matrix.cfg_release_channel }}
+      PRIV_KEY: ${{ secrets.SEPOLIA_PRIVATE_KEY }}
     strategy:
       matrix:
         target: [wasm32-unknown-unknown]

ci/smoke_test.sh

@@ -11,4 +11,4 @@ cargo stylus new counter
 cd counter
 echo "[workspace]" >> Cargo.toml
 
-cargo stylus deploy -e http://localhost:8547 --private-key 0xb6b15c8cb491557369f3c7d2c287b053eb229daa9c22138887752191c9520659
+cargo stylus deploy --private-key $PRIV_KEY

examples/erc20/src/main.rs

@@ -48,7 +48,7 @@ impl Weth {
         self.erc20.burn(msg::sender(), amount)?;
 
         // send the user their funds
-        call::transfer_eth(self, msg::sender(), amount)
+        call::transfer_eth(msg::sender(), amount)
     }
 
     // sums numbers

stylus-sdk/src/hostio.rs

@@ -52,6 +52,24 @@ extern "C" {
     /// [`SSTORE`]: https://www.evm.codes/#55
     pub fn storage_store_bytes32(key: *const u8, value: *const u8);
 
+    /// Reads a 32-byte value from transient storage. Stylus's storage format is identical to
+    /// that of the EVM. This means that, under the hood, this hostio is accessing the 32-byte
+    /// value stored in the EVM transient storage at offset `key`, which will be `0` when not
+    /// previously set. The semantics, then, are equivalent to that of the EVM's [`TLOAD`] opcode.
+    ///
+    /// [`TLOAD`]: https://eips.ethereum.org/EIPS/eip-1153
+    #[allow(dead_code)]
+    pub fn transient_load_bytes32(key: *const u8, dest: *mut u8);
+
+    /// Stores a 32-byte value to transient storage. Stylus's storage format is identical to that
+    /// of the EVM. This means that, under the hood, this hostio is storing a 32-byte value into
+    /// the EVM transient storage at offset `key`. Furthermore, refunds are tabulated exactly as in
+    /// the EVM. The semantics, then, are equivalent to that of the EVM's [`TSTORE`] opcode.
+    ///
+    /// [`TSTORE`]: https://eips.ethereum.org/EIPS/eip-1153
+    #[allow(dead_code)]
+    pub fn transient_store_bytes32(key: *const u8, value: *const u8);
+
     /// Gets the basefee of the current block. The semantics are equivalent to that of the EVM's
     /// [`BASEFEE`] opcode.
     ///

stylus-sdk/src/storage/mod.rs

@@ -82,6 +82,26 @@ pub unsafe fn store_bytes32(key: U256, data: B256) {
     unsafe { hostio::storage_store_bytes32(B256::from(key).as_ptr(), data.as_ptr()) };
 }
 
+/// Retrieves a 32-byte EVM word from transient storage directly, bypassing all caches.
+///
+/// # Safety
+///
+/// May alias transient storage.
+pub unsafe fn transient_load_bytes32(key: U256) -> B256 {
+    let mut data = B256::ZERO;
+    unsafe { hostio::transient_load_bytes32(B256::from(key).as_ptr(), data.as_mut_ptr()) };
+    data
+}
+
+/// Stores a 32-byte EVM word to transient storage directly, bypassing all caches.
+///
+/// # Safety
+///
+/// May alias transient storage.
+pub unsafe fn transient_store_bytes32(key: U256, data: B256) {
+    unsafe { hostio::transient_store_bytes32(B256::from(key).as_ptr(), data.as_ptr()) };
+}
+
 /// Overwrites the value in a cell.
 #[inline]
 fn overwrite_cell<T>(cell: &mut OnceCell<T>, value: T) {

stylus-sdk/src/types.rs

@@ -49,7 +49,7 @@ impl AddressVM for Address {
 
     fn has_code(&self) -> bool {
         let hash = self.codehash();
-        hash.is_zero()
-            || hash == b256!("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470")
+        !hash.is_zero()
+            && hash != b256!("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470")
     }
 }