# Tempo Foundry [Tempo](https://docs.tempo.xyz/) is a blockchain designed specifically for stablecoin payments. Its architecture focuses on high throughput, low cost, and features that financial institutions, payment service providers, and fintech platforms expect from modern payment infrastructure. `Tempo Foundry` is a custom fork of [Foundry](https://github.com/foundry-rs/foundry) that integrates Tempo's payment-native protocol features directly into the familiar Foundry developer workflow. This is a temporary required drop-in replacement for upstream Foundry while Tempo-specific features are being integrated into upstream Foundry, after which this fork will be deprecated. Get started [here](https://docs.tempo.xyz/sdk/foundry) to use Tempo's features in Foundry. ## Installation Tempo's Foundry fork is installed through the standard upstream `foundryup` using the `-n tempo` flag, no separate installer is required. Getting started is very easy: Install regular `foundryup`: ```bash curl -L https://foundry.paradigm.xyz | bash ``` Or if you already have `foundryup` installed: ```bash foundryup --update ``` Next, run: ```bash foundryup -n tempo ``` It will automatically install the latest `nightly` release of the precompiled binaries: [`forge`](#forge) and [`cast`](#cast). **Done!** For additional details see the [installation guide](https://getfoundry.sh/getting-started/installation) in the [Foundry Docs][foundry-docs]. If you're experiencing any issues while installing, check out [Getting Help](#getting-help) and the [FAQ](https://getfoundry.sh/faq). ## Testnet You can connect to Tempo's public testnet using the following details: | Property | Value | | ------------------ | ------------------------------------ | | **Network Name** | Tempo Testnet (Moderato) | | **Currency** | `USD` | | **Chain ID** | `42431` | | **HTTP URL** | `https://rpc.moderato.tempo.xyz` | | **WebSocket URL** | `wss://rpc.moderato.tempo.xyz` | | **Block Explorer** | `https://explore.moderato.tempo.xyz` | Next, grab some stablecoins to test with from Tempo's [Faucet](https://docs.tempo.xyz/quickstart/faucet#faucet). Alternatively, use [`cast`](https://github.com/tempoxyz/tempo-foundry): ```bash cast rpc tempo_fundAddress

--rpc-url https://rpc.moderato.tempo.xyz ``` ## Changeset Key extensions: - In `foundryup`: - `foundryup -n tempo`: download the latest `nightly` release of Tempo's fork of Foundry. - `foundryup -n tempo -i `: download a specific `nightly` release by tag `nightly-`. - In `forge`: - `forge init -n tempo`: adds a Tempo-specific `Mail` template showcasing a `TIP20` transfer with an attached memo. - `forge install tempoxyz/tempo-std`: like `forge-std`, a collection of helpful contracts and libraries for Tempo-specific testing and utilities. - `--fee-token` support: pay gas fees in any `TIP20` stablecoin. - In `cast`: - `cast run`: updated to correctly process Tempo's system transactions when replaying a block. - `cast tip20`: alias to `cast erc20`. - `--fee-token` support: pay gas fees in any `TIP20` stablecoin. - Additionally: - Support for local and forked simulation of the Tempo execution environment. - Support for Tempo's (stateful) precompiles and default contracts including labels in traces. - A custom `TempoEvm` extends `Revm`'s `Evm` to accommodate differences Tempo introduces to optimize for payments.

[![Github Actions][gha-badge]][gha-url] [![Telegram Chat][tg-badge]][tg-url] [![Telegram Support][tg-support-badge]][tg-support-url] ![Foundry](https://img.shields.io/badge/Foundry-grey?style=flat&logo=data:image/png;base64,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%3D&link=https%3A%2F%2Fbook.getfoundry.sh%2F) [gha-badge]: https://img.shields.io/github/actions/workflow/status/foundry-rs/foundry/test.yml?branch=master [gha-url]: https://github.com/foundry-rs/foundry/actions [tg-badge]: https://img.shields.io/endpoint?color=neon&logo=telegram&label=chat&style=flat-square&url=https%3A%2F%2Ftg.sumanjay.workers.dev%2Ffoundry_rs [tg-url]: https://t.me/foundry_rs [tg-support-badge]: https://img.shields.io/endpoint?color=neon&logo=telegram&label=support&style=flat-square&url=https%3A%2F%2Ftg.sumanjay.workers.dev%2Ffoundry_support [tg-support-url]: https://t.me/foundry_support **[Install](https://getfoundry.sh/getting-started/installation)** | [Docs][foundry-docs] | [Developer Guidelines](./docs/dev/README.md) | [Contributing](./CONTRIBUTING.md) | [Crate Docs](https://foundry-rs.github.io/foundry)

--- ### Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust. Tempo's fork of Foundry consists of: - [**Forge**](#forge): Build, test, fuzz, debug and deploy [Solidity][solidity] contracts, like Hardhat, Brownie, Ape. - [**Cast**](#cast): A Swiss Army knife for interacting with EVM smart contracts, sending transactions and getting chain data. **Need help getting started with Foundry? Read the [📖 Foundry Docs][foundry-docs]!** ![Demo](.github/assets/demo.gif) ## Features - **High-Performance Compilation** - **Fast and Flexible**: Automatically detects and installs the required Solidity compiler version. - **Solidity and Vyper Support**: Fully supports both Solidity and Vyper out-of-the-box. - **Incremental Compilation**: Re-compiles only changed files, saving time. - **Parallelized Pipeline**: Leverages multi-core systems for ultra-fast builds. - **Broad Compatibility**: Supports non-standard directory structures, including [Hardhat repos](https://twitter.com/gakonst/status/1461289225337421829). - **Advanced Testing** - **No Context Switching**: Write tests directly in Solidity. - **Fuzz Testing**: Quickly identify edge cases with input shrinking and counter-example generation. - **Invariant Testing**: Ensure complex system properties hold across a wide range of inputs. - **Debugging Made Easy**: Use [forge-std](https://github.com/foundry-rs/forge-std)'s `console.sol` for flexible debug logging. - **Interactive Debugger**: Step through your Solidity code with Foundry's interactive debugger, making it easy to pinpoint issues. - **Powerful Runtime Features** - **RPC Forking**: Fast and efficient remote RPC forking backed by [Alloy][alloy]. - **Lightweight & Portable**: No dependency on Nix or other package managers for installation. - **Streamlined CI/CD** - **Optimized CI**: Accelerate builds, run tests and execute scripts using [Foundry's GitHub action][foundry-gha]. ## How Fast? Forge is quite fast at both compiling (leveraging `solc` with [foundry-compilers]) and testing. See the benchmarks below. Older benchmarks against [DappTools][dapptools] can be found in the [v0.2.0 announcement post][benchmark-post] and in the [Convex Shutdown Simulation][convex] repository. ### Testing Benchmarks | Project | Type | [Forge 1.0][foundry-1.0] | [Forge 0.2][foundry-0.2] | DappTools | Speedup | | --------------------------------------------- | -------------------- | ------------------------ | ------------------------ | --------- | -------------- | | [vectorized/solady][solady] | Unit / Fuzz | 0.9s | 2.3s | - | 2.6x | | [morpho-org/morpho-blue][morpho-blue] | Invariant | 0.7s | 1m43s | - | 147.1x | | [morpho-org/morpho-blue-oracles][morpho-blue] | Integration (Cold) | 6.1s | 6.3s | - | 1.04x | | [morpho-org/morpho-blue-oracles][morpho-blue] | Integration (Cached) | 0.6s | 0.9s | - | 1.50x | | [transmissions11/solmate][solmate] | Unit / Fuzz | 2.7s | 2.8s | 6m34s | 1.03x / 140.0x | | [reflexer-labs/geb][geb] | Unit / Fuzz | 0.2s | 0.4s | 23s | 2.0x / 57.5x | _In the above benchmarks, compilation was always skipped_ **Takeaway: Forge dramatically outperforms the competition, delivering blazing-fast execution speeds while continuously expanding its robust feature set.** ### Compilation Benchmarks

**Takeaway: Forge compilation is consistently faster than Hardhat by a factor of `2.1x` to `5.2x`, depending on the amount of caching involved.** ## Forge Forge helps you build, test, fuzz, debug and deploy Solidity contracts. The best way to understand Forge is to simply try it (in less than 30 seconds!). First, let's initialize a new `counter` example repository: ```sh forge init counter ``` Next `cd` into `counter` and build : ```sh forge build ``` ```console [⠊] Compiling... [⠔] Compiling 27 files with Solc 0.8.28 [⠒] Solc 0.8.28 finished in 452.13ms Compiler run successful! ``` Let's [test](https://getfoundry.sh/forge/tests#tests) our contracts: ```sh forge test ``` ```console [⠊] Compiling... No files changed, compilation skipped Ran 2 tests for test/Counter.t.sol:CounterTest [PASS] testFuzz_SetNumber(uint256) (runs: 256, μ: 31121, ~: 31277) [PASS] test_Increment() (gas: 31293) Suite result: ok. 2 passed; 0 failed; 0 skipped; finished in 5.35ms (4.86ms CPU time) Ran 1 test suite in 5.91ms (5.35ms CPU time): 2 tests passed, 0 failed, 0 skipped (2 total tests) ``` Finally, let's run our deployment script: ```sh forge script script/Counter.s.sol ``` ```console [⠊] Compiling... No files changed, compilation skipped Script ran successfully. Gas used: 109037 If you wish to simulate on-chain transactions pass a RPC URL. ``` Run `forge --help` to explore the full list of available subcommands and their usage. More documentation can be found in the [forge](https://getfoundry.sh/forge/overview) section of the Foundry Docs. ## Cast Cast is a Swiss Army knife for interacting with Ethereum applications from the command line. Here are a few examples of what you can do: **Check the latest block on Ethereum Mainnet**: ```sh cast block-number --rpc-url https://eth.merkle.io ``` **Check the Ether balance of `vitalik.eth`** ```sh cast balance vitalik.eth --ether --rpc-url https://eth.merkle.io ``` **Replay and trace a transaction** ```sh cast run 0x9c32042f5e997e27e67f82583839548eb19dc78c4769ad6218657c17f2a5ed31 --rpc-url https://eth.merkle.io ``` Optionally, pass `--etherscan-api-key ` to decode transaction traces using verified source maps, providing more detailed and human-readable information. --- Run `cast --help` to explore the full list of available subcommands and their usage. More documentation can be found in the [cast](https://getfoundry.sh/cast/overview) section of the Foundry Docs. ## Configuration Foundry is highly configurable, allowing you to tailor it to your needs. Configuration is managed via a file called [`foundry.toml`](./crates/config) located in the root of your project or any parent directory. For a full list of configuration options, refer to the [config package documentation](./crates/config/README.md#all-options). **Profiles and Namespaces** - Configuration can be organized into **profiles**, which are arbitrarily namespaced for flexibility. - The default profile is named `default`. Learn more in the [Default Profile section](./crates/config/README.md#default-profile). - To select a different profile, set the `FOUNDRY_PROFILE` environment variable. - Override specific settings using environment variables prefixed with `FOUNDRY_` (e.g., `FOUNDRY_SRC`). --- You can find additional [setup and configurations guides](https://getfoundry.sh/config/overview) in the [Foundry Docs][foundry-docs] and in the [config crate](./crates/config/README.md): - [Configuring with `foundry.toml`](https://getfoundry.sh/config/overview) - [Setting up VSCode][vscode-setup] - [Shell autocompletions][shell-setup] ## Contributing See our [contributing guidelines](./CONTRIBUTING.md). ## Getting Help First, see if the answer to your question can be found in the [Foundry Docs][foundry-docs], or in the relevant crate. If the answer is not there: - Join the [support Telegram][tg-support-url] to get help, or - Open a [discussion](https://github.com/foundry-rs/foundry/discussions/new) with your question, or - Open an issue with [the bug](https://github.com/foundry-rs/foundry/issues/new) If you want to contribute, or follow along with contributor discussion, you can use our [main telegram](https://t.me/foundry_rs) to chat with us about the development of Foundry! ## Security See [`SECURITY.md`](https://github.com/tempoxyz/tempo-foundry?tab=security-ov-file). ## License Licensed under either of [Apache License](./LICENSE-APACHE), Version 2.0 or [MIT License](./LICENSE-MIT) at your option. Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in these crates by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. ## Acknowledgements - Foundry is a clean-room rewrite of the testing framework [DappTools][dapptools]. None of this would have been possible without the DappHub team's work over the years. - [Matthias Seitz](https://twitter.com/mattsse_): Created [ethers-solc] (now [foundry-compilers]) which is the backbone of our compilation pipeline, as well as countless contributions to ethers, in particular the `abigen` macros. - [Rohit Narurkar](https://twitter.com/rohitnarurkar): Created the Rust Solidity version manager [svm-rs](https://github.com/roynalnaruto/svm-rs) which we use to auto-detect and manage multiple Solidity versions. - [Brock Elmore](https://twitter.com/brockjelmore): For extending the VM's cheatcodes and implementing [structured call tracing](https://github.com/foundry-rs/foundry/pull/192), a critical feature for debugging smart contract calls. - Thank you to [Depot](https://depot.dev) for sponsoring us with their fast GitHub runners and sccache, which we use in CI to reduce build and test times significantly. - All the other [contributors](https://github.com/foundry-rs/foundry/graphs/contributors) to the [ethers-rs](https://github.com/gakonst/ethers-rs), [alloy][alloy] & [foundry](https://github.com/foundry-rs/foundry) repositories and chatrooms. [solidity]: https://soliditylang.org/ [foundry-docs]: https://getfoundry.sh [foundry-gha]: https://github.com/foundry-rs/foundry-toolchain [foundry-compilers]: https://github.com/foundry-rs/compilers [ethers-solc]: https://github.com/gakonst/ethers-rs/tree/master/ethers-solc/ [solady]: https://github.com/Vectorized/solady [openzeppelin]: https://github.com/OpenZeppelin/openzeppelin-contracts/tree/release-v5.1 [morpho-blue]: https://github.com/morpho-org/morpho-blue [solmate]: https://github.com/transmissions11/solmate/ [geb]: https://github.com/reflexer-labs/geb [benchmark-post]: https://www.paradigm.xyz/2022/03/foundry-02#blazing-fast-compilation--testing [convex]: https://github.com/mds1/convex-shutdown-simulation [vscode-setup]: https://getfoundry.sh/config/vscode.html [shell-setup]: https://getfoundry.sh/config/shell-autocompletion.html [foundry-0.2]: https://github.com/foundry-rs/foundry/releases/tag/nightly-5b7e4cb3c882b28f3c32ba580de27ce7381f415a [foundry-1.0]: https://github.com/foundry-rs/foundry/releases/tag/nightly-59f354c179f4e7f6d7292acb3d068815c79286d1 [dapptools]: https://github.com/dapphub/dapptools [alloy]: https://github.com/alloy-rs/alloy

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