chore(target_chains/eth): revert solidity version

This change reverts the solidity version to 0.8.4 as the current version
troubles the Pyth price feeds contract deployment. Some tests are
changed to use the methods available in the older version.

Also, the Pyth contract version is updated. This is because we made a
change to the Governance structs (to add Stacks) that results in a new
bytecode.

target_chains/ethereum/contracts/contracts/executor/Executor.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.12;
+pragma solidity ^0.8.0;
 
 import "../pyth/PythGovernanceInstructions.sol";
 import "../wormhole/interfaces/IWormhole.sol";

target_chains/ethereum/contracts/contracts/pyth/Pyth.sol

@@ -727,6 +727,6 @@ abstract contract Pyth is
     }
 
     function version() public pure returns (string memory) {
-        return "1.3.2";
+        return "1.3.3";
     }
 }

target_chains/ethereum/contracts/forge-test/Executor.t.sol

@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: Apache 2
 
-pragma solidity ^0.8.12;
+pragma solidity ^0.8.0;
 
 import "forge-std/Test.sol";
 import "@pythnetwork/entropy-sdk-solidity/EntropyStructs.sol";
@@ -61,7 +61,11 @@ contract ExecutorTest is Test, WormholeTestUtils {
 
         uint32 c = callable.fooCount();
         assertEq(callable.lastCaller(), address(bytes20(0)));
-        testExecute(address(callable), abi.encodeCall(ICallable.foo, ()), 1);
+        testExecute(
+            address(callable),
+            abi.encodeWithSelector(ICallable.foo.selector),
+            1
+        );
         assertEq(callable.fooCount(), c + 1);
         assertEq(callable.lastCaller(), address(executor));
         // Sanity check to make sure the check above is meaningful.
@@ -75,7 +79,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
         assertEq(callable.lastCaller(), address(bytes20(0)));
         testExecute(
             address(callable),
-            abi.encodeCall(ICallable.fooWithArgs, (17)),
+            abi.encodeWithSelector(ICallable.fooWithArgs.selector, 17),
             1
         );
         assertEq(callable.fooCount(), c + 17);
@@ -86,7 +90,11 @@ contract ExecutorTest is Test, WormholeTestUtils {
 
     function testCallerAddress() public {
         uint32 c = callable.fooCount();
-        testExecute(address(callable), abi.encodeCall(ICallable.foo, ()), 1);
+        testExecute(
+            address(callable),
+            abi.encodeWithSelector(ICallable.foo.selector),
+            1
+        );
         assertEq(callable.fooCount(), c + 1);
     }
 
@@ -107,7 +115,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
                 CHAIN_ID,
                 address(executor),
                 address(callable),
-                abi.encodeCall(ICallable.foo, ())
+                abi.encodeWithSelector(ICallable.foo.selector)
             );
 
             bytes memory vaa = forgeVaa(
@@ -134,7 +142,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -158,7 +166,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -175,7 +183,11 @@ contract ExecutorTest is Test, WormholeTestUtils {
     }
 
     function testOutOfOrder() public {
-        testExecute(address(callable), abi.encodeCall(ICallable.foo, ()), 3);
+        testExecute(
+            address(callable),
+            abi.encodeWithSelector(ICallable.foo.selector),
+            3
+        );
 
         bytes memory payload = abi.encodePacked(
             uint32(0x5054474d),
@@ -184,7 +196,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -200,7 +212,11 @@ contract ExecutorTest is Test, WormholeTestUtils {
         executor.execute(vaa);
 
         callable.reset();
-        testExecute(address(callable), abi.encodeCall(ICallable.foo, ()), 4);
+        testExecute(
+            address(callable),
+            abi.encodeWithSelector(ICallable.foo.selector),
+            4
+        );
         assertEq(callable.fooCount(), 1);
     }
 
@@ -212,7 +228,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory shortPayload = BytesLib.slice(
@@ -241,7 +257,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             uint16(3),
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -265,7 +281,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(0x1),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -289,7 +305,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.foo, ())
+            abi.encodeWithSelector(ICallable.foo.selector)
         );
 
         bytes memory vaa = generateVaa(
@@ -313,7 +329,7 @@ contract ExecutorTest is Test, WormholeTestUtils {
             CHAIN_ID,
             address(executor),
             address(callable),
-            abi.encodeCall(ICallable.reverts, ())
+            abi.encodeWithSelector(ICallable.reverts.selector)
         );
 
         bytes memory vaa = generateVaa(

target_chains/ethereum/contracts/foundry.toml

@@ -1,5 +1,5 @@
 [profile.default]
-solc_version = '0.8.23'
+solc_version = '0.8.4'
 optimizer = true
 optimizer_runs = 200
 src = 'contracts'

target_chains/ethereum/contracts/truffle-config.js

@@ -33,7 +33,7 @@ module.exports = {
 
   compilers: {
     solc: {
-      version: "0.8.23",
+      version: "0.8.4",
       settings: {
         optimizer: {
           enabled: true,