Fix from in evm_address to make a mut local copy of the bits argument before calling mcli

sway-lib-std/src/vm/evm/evm_address.sw

@@ -28,12 +28,14 @@ pub trait From {
 impl From for EvmAddress {
     fn from(bits: b256) -> EvmAddress {
         // An EVM address is only 20 bytes, so the first 12 are set to zero
-        asm(r1: bits) {
+        // Create a mutable local copy of `bits`
+        let mut local_bits = bits;
+        asm(r1: local_bits) {
             mcli r1 i12;
         };
 
         EvmAddress {
-            value: bits,
+            value: local_bits,
         }
     }
 }

test/src/sdk-harness/test_artifacts/evm_test_abi/.gitignore

@@ -0,0 +1,2 @@
+out
+target

test/src/sdk-harness/test_artifacts/evm_test_abi/Forc.lock

@@ -0,0 +1,14 @@
+[[package]]
+name = 'core'
+source = 'path+from-root-DD6C78AF57ACC141'
+dependencies = []
+
+[[package]]
+name = 'evm_test_abi'
+source = 'root'
+dependencies = ['std']
+
+[[package]]
+name = 'std'
+source = 'path+from-root-DD6C78AF57ACC141'
+dependencies = ['core']

test/src/sdk-harness/test_artifacts/evm_test_abi/Forc.toml

@@ -0,0 +1,8 @@
+[project]
+authors = ["Fuel Labs <contact@fuel.sh>"]
+entry = "main.sw"
+license = "Apache-2.0"
+name = "evm_test_abi"
+
+[dependencies]
+std = { path = "../../../../../sway-lib-std" }

test/src/sdk-harness/test_artifacts/evm_test_abi/src/main.sw

@@ -0,0 +1,8 @@
+library evm_test_abi;
+
+use std::vm::evm::evm_address::EvmAddress;
+
+abi EvmTest {
+    fn evm_address_from_literal() -> EvmAddress;
+    fn evm_address_from_argument(raw_address: b256) -> EvmAddress;
+}

test/src/sdk-harness/test_projects/evm/.gitignore

@@ -0,0 +1,2 @@
+out
+target

test/src/sdk-harness/test_projects/evm/Forc.lock

@@ -0,0 +1,22 @@
+[[package]]
+name = 'core'
+source = 'path+from-root-4947D78C815C1154'
+dependencies = []
+
+[[package]]
+name = 'evm'
+source = 'root'
+dependencies = [
+    'evm_test_abi',
+    'std',
+]
+
+[[package]]
+name = 'evm_test_abi'
+source = 'path+from-root-4947D78C815C1154'
+dependencies = ['std']
+
+[[package]]
+name = 'std'
+source = 'path+from-root-4947D78C815C1154'
+dependencies = ['core']

test/src/sdk-harness/test_projects/evm/Forc.toml

@@ -0,0 +1,9 @@
+[project]
+authors = ["Fuel Labs <contact@fuel.sh>"]
+entry = "main.sw"
+license = "Apache-2.0"
+name = "evm"
+
+[dependencies]
+evm_test_abi = { path = "../../test_artifacts/evm_test_abi" }
+std = { path = "../../../../../sway-lib-std" }

test/src/sdk-harness/test_projects/evm/mod.rs

@@ -0,0 +1,35 @@
+use fuels::{prelude::*, tx::ContractId};
+
+abigen!(
+    EvmTestContract,
+    "test_projects/evm/out/debug/evm-abi.json"
+);
+
+async fn get_evm_test_instance() -> (EvmTestContract, ContractId) {
+    let wallet = launch_provider_and_get_single_wallet().await;
+    let id = Contract::deploy(
+        "test_projects/evm/out/debug/evm.bin",
+        &wallet,
+        TxParameters::default(),
+    )
+    .await
+    .unwrap();
+    let instance = EvmTestContract::new(id.to_string(), wallet);
+
+    (instance, id)
+}
+
+#[tokio::test]
+async fn can_call_from() {
+    let (instance, _) = get_evm_test_instance().await;
+
+    let raw_address = [6; 32]; // hardcoded in the contract to test calling `from()` with a literal
+    let result = instance.evm_address_from_literal().call().await.unwrap();
+    assert_eq!(result.value.value[0..12], [0; 12]);
+    assert_eq!(result.value.value[12..32], raw_address[12..32]);
+
+    let raw_address = [7; 32];
+    let result = instance.evm_address_from_argument(raw_address.into()).call().await.unwrap();
+    assert_eq!(result.value.value[0..12], [0; 12]);
+    assert_eq!(result.value.value[12..32], raw_address[12..32]);
+}

test/src/sdk-harness/test_projects/evm/src/main.sw

@@ -0,0 +1,14 @@
+contract;
+
+use evm_test_abi::EvmTest;
+use std::vm::evm::evm_address::EvmAddress;
+
+impl EvmTest for Contract {
+    fn evm_address_from_literal() -> EvmAddress {
+        ~EvmAddress::from(0x0606060606060606060606060606060606060606060606060606060606060606)
+    }
+
+    fn evm_address_from_argument(raw_address: b256) -> EvmAddress {
+        ~EvmAddress::from(raw_address)
+    }
+}

test/src/sdk-harness/test_projects/harness.rs

@@ -3,6 +3,7 @@
 mod auth;
 mod call_frames;
 mod context;
+mod evm;
 mod exponentiation;
 mod hashing;
 mod logging;