add hello world example

.devcontainer/Dockerfile

@@ -6,8 +6,3 @@ FROM mcr.microsoft.com/devcontainers/base
 
 COPY --from=avalanchego /avalanchego/build /go/src/github.com/ava-labs/avalanchego/build
 COPY --from=avalanche-cli /avalanche /usr/local/bin/avalanche
-
-COPY --from=foundry /usr/local/bin/forge /usr/local/bin/forge
-COPY --from=foundry /usr/local/bin/cast /usr/local/bin/cast
-COPY --from=foundry /usr/local/bin/anvil /usr/local/bin/anvil
-COPY --from=foundry /usr/local/bin/chisel /usr/local/bin/chisel

.devcontainer/devcontainer.json

@@ -6,7 +6,7 @@
 	"build": {
 		"dockerfile": "Dockerfile",
 		"args": {
-			"AVALANCHEGO_VERSION": "v1.11.13"
+			"AVALANCHEGO_VERSION": "v1.12.1"
 		}
 	},
 	"runArgs": ["--network=host"],
@@ -26,7 +26,7 @@
 			"version": "latest"
 		},
 		"ghcr.io/devcontainers/features/node:1": {},
-		"ghcr.io/devcontainers/features/go:1": {}
+		"ghcr.io/devcontainers/features/go:1": {"version": 1.22}
 	 },
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.

.github/workflows/sync.yml

@@ -0,0 +1,24 @@
+name: Sync
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  sync-branches:
+    runs-on: ubuntu-latest
+    name: Syncing branches
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Set up Node
+        uses: actions/setup-node@v1
+        with:
+          node-version: 12
+      - name: Opening pull request
+        id: pull
+        uses: tretuna/[email protected]
+        with:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+          FROM_BRANCH: "main"
+          TO_BRANCH: "develop"

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ on:
   pull_request:
 
 env:
-  min_go_version: "~1.21.12"
+  min_go_version: "~1.22.8"
 
 jobs:
   lint_test:

README.md

@@ -28,38 +28,153 @@ In order to run the Dev Container locally:
 
 ## Learn about Precompile-EVM
 
-To get a comprehensive introduction to Precompile-EVM, take the Avalanche Academy course on [Customizing the EVM](https://academy.avax.com/course/customize-evm).
+To get a comprehensive introduction to Precompile-EVM, take the Avalanche Academy course on [Customizing the EVM](https://academy.avax.com/course/customizing-evm).
 
-## How to use
+## Hello World Example
 
-There is an example branch [hello-world-example](https://github.com/ava-labs/precompile-evm/tree/hello-world-example) in this repository. You can check the example branch to see how to register precompiles and test them.
+### 1. Clone the Repo
 
-### Generate Precompile Files
+```bash
+git clone https://github.com/ava-labs/precompile-evm.git
+cd precompile-evm/
+```
+
+### 2. Checkout the `hello-world-example` Branch
+
+```bash
+git checkout hello-world-example
+```
+
+### 3. Install NodeJS Dependencies
+
+First you have to `cd contracts/` and run `npm install` to get the dependencies.
+
+```bash
+cd contracts/
+npm install
+```
+
+### 4. Create a New Contract
+
+`hello-world-example` branch has already a precompile contract called `HelloWorld.sol`. All necessary files were already created for you. You can check existing files and see how a fully implemented precompile should look like. If you'd like to redo steps to create a new precompile contract, you can follow the steps below.
+
+Copy the existing `IHelloWorld.sol` interface to a new file called `IHolaMundo.sol`.
+
+```bash
+cd .. # change directory back to the root of the repo
+```
+```bash
+cp contracts/contracts/interfaces/IHelloWorld.sol contracts/contracts/interfaces/IHolaMundo.sol
+```
+
+### 5. Generate an ABI
+
+Now generate a `.abi` from a `.sol` using `solc`.
+
+Passing in the following flags
+
+- `--abi`
+  - ABI specification of the contracts.
+- `--base-path path`
+  - Use the given path as the root of the source tree instead of the root of the filesystem.
+- `--include-path path`
+  - Make an additional source directory available to the default import callback. Use this option if you want to import contracts whose location is not fixed in relation to your main source tree, e.g. third-party libraries installed using a package manager. Can be used multiple times. Can only be used if base path has a non-empty value.
+- `--output-dir path`
+  - If given, creates one file per output component and contract/file at the specified directory.
+- `--overwrite`
+  - Overwrite existing files (used together with `--output-dir`).
+
+```bash
+cd contracts/ # change directory to the contracts/ directory
+```
+```bash
+npx solc --abi contracts/interfaces/IHolaMundo.sol --output-dir abis --base-path . --include-path ./node_modules
+```
+
+Rename the files for easier readability
+```bash
+mv abis/@avalabs_subnet-evm-contracts_contracts_interfaces_IAllowList_sol_IAllowList.abi abis/IAllowList.abi
+```
+```bash
+mv abis/contracts_interfaces_IHolaMundo_sol_IHelloWorld.abi abis/IHolaMundo.abi
+```
+
+### 6. Generate Precompile Files
 
 First, you need to create your precompile contract interface in the `contracts` directory and build the ABI. Then you can generate your precompile files with `./scripts/generate_precompile.sh --abi {abiPath} --out {outPath}`. This script installs the `precompilegen` tool from Subnet-EVM and runs it to generate your precompile.
 
-### Register Precompile
+```bash
+cd .. # change directory back to the root directory of the repo
+```
+```bash
+./scripts/generate_precompile.sh --abi contracts/abis/IHolaMundo.abi --out holamundo/
+```
+```bash
+Using branch: hello-world-example
+installing precompilegen from Subnet-EVM v0.5.2
+generating precompile with Subnet-EVM v0.5.2
+Precompile files generated successfully at:  holamundo/
+```
+
+Confirm that the new `holamundo/` directory has the appropriate files.
+
+```bash
+ls -lh holamundo
+```
+```bash
+-rw-r--r--  1 user group 2.3K Jul  5 13:26 README.md
+-rw-r--r--  1 user group 2.3K Jul  5 13:26 config.go
+-rw-r--r--  1 user group 2.8K Jul  5 13:26 config_test.go
+-rw-r--r--  1 user group 963B Jul  5 13:26 contract.abi
+-rw-r--r--  1 user group 8.1K Jul  5 13:26 contract.go
+-rw-r--r--  1 user group 8.3K Jul  5 13:26 contract_test.go
+-rw-r--r--  1 user group 2.7K Jul  5 13:26 module.go
+```
 
-In `plugin/main.go` Subnet-EVM is already imported and ready to be Run from the main package. All you need to do is explicitly register your precompiles to Subnet-EVM in `plugin/main.go` and build it together with Subnet-EVM. Precompiles generated by `precompilegen` tool have a self-registering mechanism in their `module.go/init()` function. All you need to do is to force-import your precompile packprecompile package in `plugin/main.go`.
+### 7. Register Precompile
 
-### Build
+In `plugin/main.go` Subnet-EVM is already imported and ready to be Run from the main package.
 
-You can build your precompile and Subnet-EVM with `./scripts/build.sh`. This script builds Subnet-EVM, and your precompile together and generates a binary file. The binary file is compatible with AvalancheGo plugins.
+All you need to do is explicitly register your precompiles to Subnet-EVM in `plugin/main.go` and build it together with Subnet-EVM.
 
-### Run
+Precompiles generated by `precompilegen` tool have a self-registering mechanism in their `module.go/init()` function.
+
+```go
+package main
+import (
+	"fmt"
+	"github.com/ava-labs/avalanchego/version"
+	"github.com/ava-labs/subnet-evm/plugin/evm"
+	"github.com/ava-labs/subnet-evm/plugin/runner"
+	// Each precompile generated by the precompilegen tool has a self-registering init function
+	// that registers the precompile with the subnet-evm. Importing the precompile package here
+	// will cause the precompile to be registered with the subnet-evm.
+	_ "github.com/ava-labs/precompile-evm/helloworld"
+	// ADD YOUR PRECOMPILE HERE
+	//_ "github.com/ava-labs/precompile-evm/holamundo"
+)
+```
+
+### 8. Build
+
+You can build your precompile and Subnet-EVM with
+```bash
+./scripts/build.sh
+```
+This script builds Subnet-EVM, and your precompile together and generates a binary file. The binary file is compatible with AvalancheGo plugins.
 
-You can run you Precompile-EVM by using the Avalanche CLI.
+### 9. Run
 
-First, create the configuration for your subnet.
+You can now run Precompile-EVM by using the Avalanche-CLI
 
 ```bash
-avalanche subnet create mysubnet --custom --vm $AVALANCHEGO_PLUGIN_PATH/srEXiWaHuhNyGwPUi444Tu47ZEDwxTWrbQiuD7FmgSAQ6X7Dy --genesis ./.devcontainer/genesis-example.json
+avalanche blockchain create myblockchain --custom --vm $AVALANCHEGO_PLUGIN_PATH/srEXiWaHuhNyGwPUi444Tu47ZEDwxTWrbQiuD7FmgSAQ6X7Dy --genesis ./.devcontainer/genesis-example.json
 ```
 
-Next, launch the Subnet with your custom VM:
+Then launch the blockchain with your custom VM:
 
 ```bash
-avalanche subnet deploy mysubnet
+avalanche blockchain deploy myblockchain
 ```
 
 ### Test

compatibility.json

@@ -1,5 +1,6 @@
 {
   "rpcChainVMProtocolVersion": {
+    "v0.3.0": 38,
     "v0.2.5": 38,
     "v0.2.4": 37,
     "v0.2.3": 35,

contracts/README.md

@@ -111,15 +111,6 @@ Subnet-EVM must activate any precompiles used in the test in the genesis:
 {
   "config": {
     "chainId": 43214,
-    "homesteadBlock": 0,
-    "eip150Block": 0,
-    "eip155Block": 0,
-    "eip158Block": 0,
-    "byzantiumBlock": 0,
-    "constantinopleBlock": 0,
-    "petersburgBlock": 0,
-    "istanbulBlock": 0,
-    "muirGlacierBlock": 0,
     "feeConfig": {
       "gasLimit": 8000000,
       "minBaseFee": 25000000000,

contracts/contracts/ExampleHelloWorld.sol

@@ -0,0 +1,19 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "./interfaces/IHelloWorld.sol";
+
+address constant HELLO_WORLD_ADDRESS = 0x0300000000000000000000000000000000000000;
+
+// ExampleHelloWorld shows how the HelloWorld precompile can be used in a smart contract.
+contract ExampleHelloWorld {
+  IHelloWorld helloWorld = IHelloWorld(HELLO_WORLD_ADDRESS);
+
+  function sayHello() public view returns (string memory) {
+    return helloWorld.sayHello();
+  }
+
+  function setGreeting(string calldata greeting) public {
+    helloWorld.setGreeting(greeting);
+  }
+}

contracts/contracts/interfaces/IHelloWorld.sol

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: MIT
+
+pragma solidity >=0.8.0;
+import "@avalabs/subnet-evm-contracts/contracts/interfaces/IAllowList.sol";
+
+interface IHelloWorld is IAllowList {
+  event GreetingChanged(address indexed sender, string oldGreeting, string newGreeting);
+  // sayHello returns the stored greeting string
+  function sayHello() external view returns (string calldata result);
+
+  // setGreeting  stores the greeting string
+  function setGreeting(string calldata response) external;
+}

contracts/contracts/test/ExampleHelloWorldTest.sol

@@ -0,0 +1,42 @@
+//SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+import "../ExampleHelloWorld.sol";
+import "../interfaces/IHelloWorld.sol";
+import "@avalabs/subnet-evm-contracts/contracts/test/AllowListTest.sol";
+
+contract ExampleHelloWorldTest is AllowListTest {
+  IHelloWorld helloWorld = IHelloWorld(HELLO_WORLD_ADDRESS);
+
+  function step_getDefaultHelloWorld() public {
+    ExampleHelloWorld example = new ExampleHelloWorld();
+    address exampleAddress = address(example);
+
+    assertRole(helloWorld.readAllowList(exampleAddress), AllowList.Role.None);
+    assertEq(example.sayHello(), "Hello World!");
+  }
+
+  function step_doesNotSetGreetingBeforeEnabled() public {
+    ExampleHelloWorld example = new ExampleHelloWorld();
+    address exampleAddress = address(example);
+
+    assertRole(helloWorld.readAllowList(exampleAddress), AllowList.Role.None);
+
+    try example.setGreeting("testing") {
+      assertTrue(false, "setGreeting should fail");
+    } catch {} // TODO should match on an error to make sure that this is failing in the way that's expected
+  }
+
+  function step_setAndGetGreeting() public {
+    ExampleHelloWorld example = new ExampleHelloWorld();
+    address exampleAddress = address(example);
+
+    assertRole(helloWorld.readAllowList(exampleAddress), AllowList.Role.None);
+    helloWorld.setEnabled(exampleAddress);
+    assertRole(helloWorld.readAllowList(exampleAddress), AllowList.Role.Enabled);
+
+    string memory greeting = "testgreeting";
+    example.setGreeting(greeting);
+    assertEq(example.sayHello(), greeting);
+  }
+}