evm: Set up compiler version

evm/.gitignore

@@ -15,3 +15,6 @@ docs/
 
 # Code coverage
 lcov.info
+
+# Flattened source
+flattened

evm/README.md

@@ -85,6 +85,14 @@ evm$ RPC_URL= MNEMONIC= OUR_CHAIN_ID= EVM_CHAIN_ID= ADMIN= ROUTER= WORMHOLE= CON
 
 Note that the deploy script uses `create2` to generate a deterministic contract address.
 
+### Generating Flattened Source
+
+If you need to generate flattened source to be used for contract verification, you can use the following command. The results will be in `evm/flattened`.
+
+```shell
+evm$ ./sh/flatten.sh
+```
+
 ### Configuring Peer Transceivers
 
 To configure a peer Wormhole Transceiver for a given chain, you can use the following command.

evm/foundry.toml

@@ -3,4 +3,10 @@ src = "src"
 out = "out"
 libs = ["lib"]
 
+solc_version = "0.8.24"
+evm_version = "paris"
+optimizer = true
+optimizer_runs = 200
+via_ir = false
+
 # See more config options https://github.com/foundry-rs/foundry/blob/master/crates/config/README.md#all-options

evm/script/DeployWormholeTransceiver.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 import {WormholeTransceiver, wormholeTransceiverVersionString} from "../src/WormholeTransceiver.sol";
 import "forge-std/Script.sol";

evm/script/ReceiveMsg.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 import {WormholeTransceiver} from "../src/WormholeTransceiver.sol";
 import "forge-std/Script.sol";

evm/script/SetPeer.s.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: UNLICENSED
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 import {WormholeTransceiver} from "../src/WormholeTransceiver.sol";
 import "forge-std/Script.sol";

evm/sh/flatten.sh

@@ -0,0 +1,9 @@
+rm -rf flattened
+mkdir flattened
+for fileName in \
+src/WormholeTransceiver.sol
+  do
+	echo $fileName
+	flattened=flattened/`basename $fileName`
+	forge flatten --output $flattened $fileName
+done

evm/src/WormholeTransceiver.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: Apache 2
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 import "example-gmp-router/interfaces/IRouterTransceiver.sol";
 

evm/src/interfaces/IWormholeTransceiver.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: Apache 2
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 import "example-gmp-router/interfaces/ITransceiver.sol";
 

evm/src/libraries/TransceiverHelpers.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: Apache 2
-pragma solidity ^0.8.13;
+pragma solidity ^0.8.19;
 
 /// @notice A fork has occurred.
 /// @dev Selector: 0x77d879fb