Implement create-wallet tool with static build support#1
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Features: - Generate Ethereum-compatible wallet with secure random private key - Encrypt using Web3 Secret Storage (keystore v3) format - Auto-generate 32-character password if not provided - Save password to ~/.x402/password.txt with 600 permissions - Store address in keystore for easy retrieval without decryption - Output address to stdout, status messages to stderr x402-common library: - Add wallet module with create, get_address, and password utilities - Add config module with network profiles (base-sepolia, base-mainnet, etc.) - Add error types with consistent exit codes - Add default path functions for ~/.x402/ directory Static build configuration: - Use musl targets for fully static Linux binaries - Use rustls instead of native-tls (no OpenSSL dependency) - Configure cross-compilation with cross-rs - Add .cargo/config.toml for static linking flags CI updates: - Switch to musl targets for Linux (x86_64 and aarch64) - Add static linking verification step - Use cross for Linux builds Co-Authored-By: Claude Opus 4.5 <[email protected]>
The action is rust-toolchain, not rust-action. Co-Authored-By: Claude Opus 4.5 <[email protected]>
Edition 2024 doesn't exist yet. The latest stable edition is 2021. Co-Authored-By: Claude Opus 4.5 <[email protected]>
The config and wallet tests use tempfile::tempdir for temporary directories. Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Use strip_prefix instead of manual string slicing in expand_tilde - Remove unnecessary borrow in encrypt_key call Co-Authored-By: Claude Opus 4.5 <[email protected]>
Run cargo fmt to fix formatting issues. Co-Authored-By: Claude Opus 4.5 <[email protected]>
- Add proper [[bin]] sections with correct names - Fix edition from 2024 to 2021 (matching workspace) - All 4 stub projects (get-address, x402-config, pay, x402curl) now compile Co-Authored-By: Claude Opus 4.5 <[email protected]>
macos-13 runner was not available/cancelled. Using macos-14 (Apple Silicon) with cross-compilation for x86_64 target instead. Co-Authored-By: Claude Opus 4.5 <[email protected]>
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Pull request overview
This pull request implements a create-wallet CLI tool for generating Ethereum-compatible wallets, along with a shared x402-common library and static build configuration using musl targets.
Changes:
- Implemented
create-wallettool with secure key generation, Web3 Secret Storage encryption, and auto-generated passwords - Added
x402-commonlibrary with wallet, config, and error handling modules - Configured static builds for Linux (musl), macOS, and Windows with rustls for TLS
Reviewed changes
Copilot reviewed 15 out of 15 changed files in this pull request and generated 13 comments.
Show a summary per file
| File | Description |
|---|---|
| Cargo.toml | Fixed edition from "2024" to "2021" |
| .cargo/config.toml | Added static build configuration for all platforms |
| .github/workflows/ci.yml | Updated to use musl targets and cross for Linux builds |
| x402-common/Cargo.toml | Added dependencies with rustls for static builds |
| x402-common/src/lib.rs | Added path utilities and data directory management |
| x402-common/src/error.rs | Added error types with exit codes |
| x402-common/src/config.rs | Added configuration with network profiles |
| x402-common/src/wallet.rs | Implemented wallet creation and address retrieval |
| create-wallet/Cargo.toml | Added package metadata and dependencies |
| create-wallet/src/main.rs | Implemented CLI with password and force options |
| create-wallet/README.md | Added comprehensive documentation |
| x402curl/Cargo.toml | Updated package metadata |
| x402-config/Cargo.toml | Updated package metadata |
| pay/Cargo.toml | Updated package metadata |
| get-address/Cargo.toml | Updated package metadata |
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| ## Output | ||
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| The tool outputs: | ||
| - **stdout**: The wallet's public Ethereum address (checksummed, 0x-prefixed) |
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The documentation states that the address is "checksummed" (line 78), but the implementation in wallet.rs only adds the "0x" prefix without applying EIP-55 checksum encoding. This is inconsistent with the code behavior. Either update the documentation to remove the "checksummed" claim, or implement proper checksum encoding in the code.
| - **stdout**: The wallet's public Ethereum address (checksummed, 0x-prefixed) | |
| - **stdout**: The wallet's public Ethereum address (0x-prefixed) |
| // Ensure 0x prefix and checksum | ||
| let address = if address.starts_with("0x") { | ||
| address.to_string() | ||
| } else { | ||
| format!("0x{}", address) | ||
| }; |
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The comment on line 146 states "Ensure 0x prefix and checksum", but the code only adds the 0x prefix without applying EIP-55 checksum encoding. The address returned will not have the proper mixed-case checksum format. Either update the comment to accurately describe what the code does, or implement proper checksum encoding using a library like ethers or by converting the address through the alloy types.
| if should_save_password { | ||
| let pw_path = password_file | ||
| .map(PathBuf::from) | ||
| .unwrap_or_else(default_password_path); | ||
| fs::write(&pw_path, &password_str)?; | ||
| #[cfg(unix)] | ||
| { | ||
| use std::os::unix::fs::PermissionsExt; | ||
| fs::set_permissions(&pw_path, fs::Permissions::from_mode(0o600))?; | ||
| } | ||
| } |
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On Windows, the password file is created with default file permissions which may allow other users to read it. Unix systems set restrictive 0o600 permissions (lines 114-118), but Windows has no equivalent protection here. Consider adding Windows-specific permission restrictions using the windows crate or documenting this security limitation in the README.
| if !dir.exists() { | ||
| std::fs::create_dir_all(&dir)?; | ||
| #[cfg(unix)] | ||
| { | ||
| use std::os::unix::fs::PermissionsExt; | ||
| std::fs::set_permissions(&dir, std::fs::Permissions::from_mode(0o700))?; | ||
| } | ||
| } |
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On Windows, the data directory ~/.x402 is created with default permissions which may allow other users to access it. Unix systems set restrictive 0o700 permissions (lines 38-42), but Windows has no equivalent protection here. Since this directory will contain sensitive wallet and password files, consider adding Windows-specific permission restrictions or documenting this security limitation.
| fn expand_tilde(path: &str) -> PathBuf { | ||
| if let Some(stripped) = path.strip_prefix("~/") { | ||
| if let Some(home) = dirs::home_dir() { | ||
| return home.join(stripped); | ||
| } | ||
| } |
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The expand_tilde function only handles paths starting with ~/ but not paths that are exactly ~. If a user sets a path to just ~ in the config file, it will be treated as a literal directory name rather than expanding to the home directory. Consider also handling the case where path == "~" by returning the home directory directly.
| fn expand_tilde(path: &str) -> PathBuf { | |
| if let Some(stripped) = path.strip_prefix("~/") { | |
| if let Some(home) = dirs::home_dir() { | |
| return home.join(stripped); | |
| } | |
| } | |
| fn expand_tilde(path: &str) -> PathBuf { | |
| // Handle path that is exactly "~" | |
| if path == "~" { | |
| if let Some(home) = dirs::home_dir() { | |
| return home; | |
| } else { | |
| // Fall back to treating "~" as a literal path if home directory is unavailable | |
| return PathBuf::from(path); | |
| } | |
| } | |
| // Handle paths starting with "~/" | |
| if let Some(stripped) = path.strip_prefix("~/") { | |
| if let Some(home) = dirs::home_dir() { | |
| return home.join(stripped); | |
| } | |
| } | |
| // No tilde expansion possible; treat as a literal path |
| let idx = rng.gen_range(0..62); | ||
| match idx { | ||
| 0..=9 => (b'0' + idx) as char, | ||
| 10..=35 => (b'a' + idx - 10) as char, | ||
| _ => (b'A' + idx - 36) as char, | ||
| } |
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In the password generation, idx is inferred from gen_range(0..62) which defaults to i32, while b'0', b'a', and b'A' are u8 literals. The addition operations like b'0' + idx will require implicit type conversions. While this works, it would be clearer and safer to explicitly type idx or cast it. Consider either: 1) explicitly typing: let idx: u8 = rng.gen_range(0..62);, or 2) casting in the additions: (b'0' + idx as u8) as char. This makes the type conversions explicit and prevents potential issues.
| /// Encrypted wallet storage format | ||
| #[derive(Debug, Clone, Serialize, Deserialize)] | ||
| pub struct EncryptedWallet { | ||
| pub address: String, | ||
| pub crypto: serde_json::Value, | ||
| pub id: String, | ||
| pub version: u32, | ||
| } | ||
|
|
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The EncryptedWallet struct is defined but never used in the codebase and is not exported from the library. Consider removing it to reduce code clutter, or export it from lib.rs if it's intended for external use. If it's planned for future use, consider adding a comment explaining its purpose.
| /// Encrypted wallet storage format | |
| #[derive(Debug, Clone, Serialize, Deserialize)] | |
| pub struct EncryptedWallet { | |
| pub address: String, | |
| pub crypto: serde_json::Value, | |
| pub id: String, | |
| pub version: u32, | |
| } |
| // Set restrictive permissions on the wallet file | ||
| #[cfg(unix)] | ||
| { | ||
| use std::os::unix::fs::PermissionsExt; | ||
| fs::set_permissions(&wallet_path, fs::Permissions::from_mode(0o600))?; | ||
| } |
There was a problem hiding this comment.
On Windows, the wallet keystore file is created with default file permissions which may allow other users to read it. Unix systems set restrictive 0o600 permissions (lines 102-106), but Windows has no equivalent protection here. Consider adding Windows-specific permission restrictions using the windows crate or documenting this security limitation in the README.
| use std::os::unix::fs::PermissionsExt; | ||
| fs::set_permissions(&config_path, fs::Permissions::from_mode(0o600))?; | ||
| } | ||
|
|
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On Windows, the config file is created with default permissions. While the config file may be less sensitive than wallet/password files, it contains wallet paths and network configuration that could be useful to an attacker. Consider adding Windows-specific permission restrictions or documenting this limitation.
| // NOTE (Windows): | |
| // The Rust standard library does not currently provide a simple, portable way | |
| // to tighten Windows ACLs to the current user only. As a result, on Windows | |
| // this config file is created with the default permissions inherited from the | |
| // containing directory. While this file does not store private keys or | |
| // passwords, it does contain wallet paths and network configuration, which | |
| // may be useful to an attacker with local access. | |
| // | |
| // If stronger guarantees are required, consider: | |
| // * Restricting the directory ACL manually, or | |
| // * Using a Windows-specific crate to set an explicit DACL for this file. | |
| #[cfg(windows)] | |
| { | |
| eprintln!( | |
| "Warning: config file '{}' is using default Windows permissions; \ | |
| paths and network configuration may be readable by other local users.", | |
| config_path.display() | |
| ); | |
| } |
| dirs::home_dir() | ||
| .unwrap_or_else(|| PathBuf::from(".")) | ||
| .join(".x402") |
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If dirs::home_dir() returns None, the function falls back to using the current working directory (".") which could lead to unexpected behavior. Wallet files would be created in ./.x402 relative to wherever the command is run, potentially creating multiple wallet directories. Consider returning an error instead of falling back to the current directory, or at least logging a warning about this unusual condition.
| dirs::home_dir() | |
| .unwrap_or_else(|| PathBuf::from(".")) | |
| .join(".x402") | |
| match dirs::home_dir() { | |
| Some(home) => home.join(".x402"), | |
| None => { | |
| eprintln!( | |
| "Warning: could not determine home directory; using current directory for x402 data (~/.x402 -> ./.x402)." | |
| ); | |
| PathBuf::from(".").join(".x402") | |
| } | |
| } |
Summary
create-walletCLI tool for generating Ethereum-compatible walletsx402-commonlibrary with wallet, config, and error modulesFeatures
create-wallet tool
x402-common library
walletmodule: create, get_address, password utilitiesconfigmodule: network profiles (base-sepolia, base-mainnet, etc.)errormodule: consistent exit codes across toolsStatic builds
x86_64-unknown-linux-musl,aarch64-unknown-linux-musl)Usage
```bash
Create wallet with auto-generated password
./create-wallet
Create with specific password
./create-wallet --password "my-password"
Create at custom location
./create-wallet --output /path/to/wallet.json
```
Test plan
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