update Cargo.toml to remove git submodule

.gitignore

@@ -0,0 +1,4 @@
+.DS_Store
+Cargo.lock
+methods/guest/Cargo.lock
+target/

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "rust-analyzer.linkedProjects": [
+        "./methods/guest/Cargo.toml"
+    ]
+}

Cargo.toml

@@ -0,0 +1,18 @@
+[workspace]
+resolver = "2"
+members = ["host", "methods"]
+default-members =  ["host", "methods"]
+
+# Always optimize; building and running the guest takes much longer without optimization.
+[profile.dev]
+opt-level = 3
+
+[profile.dev.build-override]
+opt-level = 3
+
+[profile.release]
+debug = 1
+lto = true
+
+[profile.release.build-override]
+opt-level = 3

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
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README.md

@@ -0,0 +1,112 @@
+# RISC Zero Rust Starter Template
+
+Welcome to the RISC Zero Rust Starter Template! This template is intended to
+give you a starting point for building a project using the RISC Zero zkVM.
+Throughout the template (including in this README), you'll find comments
+labelled `TODO` in places where you'll need to make changes. To better
+understand the concepts behind this template, check out the [zkVM
+Overview][zkvm-overview].
+
+## Quick Start
+
+First, make sure [rustup] is installed. The
+[`rust-toolchain.toml`][rust-toolchain] file will be used by `cargo` to
+automatically install the correct version.
+
+To build all methods and execute the method within the zkVM, run the following
+command:
+
+```bash
+cargo run
+```
+
+This is an empty template, and so there is no expected output (until you modify
+the code).
+
+### Executing the project locally in development mode
+
+During development, faster iteration upon code changes can be achieved by leveraging [dev-mode], we strongly suggest activating it during your early development phase. Furthermore, you might want to get insights into the execution statistics of your project, and this can be achieved by specifying the environment variable `RUST_LOG="executor=info"` before running your project.
+
+Put together, the command to run your project in development mode while getting execution statistics is:
+
+```bash
+RUST_LOG="executor=info" RISC0_DEV_MODE=1 cargo run
+```
+
+### Running proofs remotely on Bonsai
+
+_Note: The Bonsai proving service is still in early Alpha; an API key is
+required for access. [Click here to request access][bonsai access]._
+
+If you have access to the URL and API key to Bonsai you can run your proofs
+remotely. To prove in Bonsai mode, invoke `cargo run` with two additional
+environment variables:
+
+```bash
+BONSAI_API_KEY="YOUR_API_KEY" BONSAI_API_URL="BONSAI_URL" cargo run
+```
+
+## How to create a project based on this template
+
+Search this template for the string `TODO`, and make the necessary changes to
+implement the required feature described by the `TODO` comment. Some of these
+changes will be complex, and so we have a number of instructional resources to
+assist you in learning how to write your own code for the RISC Zero zkVM:
+
+- The [RISC Zero Developer Docs][dev-docs] is a great place to get started.
+- Example projects are available in the [examples folder][examples] of
+  [`risc0`][risc0-repo] repository.
+- Reference documentation is available at [https://docs.rs][docs.rs], including
+  [`risc0-zkvm`][risc0-zkvm], [`cargo-risczero`][cargo-risczero],
+  [`risc0-build`][risc0-build], and [others][crates].
+
+## Directory Structure
+
+It is possible to organize the files for these components in various ways.
+However, in this starter template we use a standard directory structure for zkVM
+applications, which we think is a good starting point for your applications.
+
+```text
+project_name
+├── Cargo.toml
+├── host
+│   ├── Cargo.toml
+│   └── src
+│       └── main.rs                        <-- [Host code goes here]
+└── methods
+    ├── Cargo.toml
+    ├── build.rs
+    ├── guest
+    │   ├── Cargo.toml
+    │   └── src
+    │       └── bin
+    │           └── method_name.rs         <-- [Guest code goes here]
+    └── src
+        └── lib.rs
+```
+
+## Video Tutorial
+
+For a walk-through of how to build with this template, check out this [excerpt
+from our workshop at ZK HACK III][zkhack-iii].
+
+## Questions, Feedback, and Collaborations
+
+We'd love to hear from you on [Discord][discord] or [Twitter][twitter].
+
+[bonsai access]: https://bonsai.xyz/apply
+[cargo-risczero]: https://docs.rs/cargo-risczero
+[crates]: https://github.com/risc0/risc0/blob/main/README.md#rust-binaries
+[dev-docs]: https://dev.risczero.com
+[dev-mode]: https://dev.risczero.com/api/zkvm/dev-mode
+[discord]: https://discord.gg/risczero
+[docs.rs]: https://docs.rs/releases/search?query=risc0
+[examples]: https://github.com/risc0/risc0/tree/main/examples
+[risc0-build]: https://docs.rs/risc0-build
+[risc0-repo]: https://www.github.com/risc0/risc0
+[risc0-zkvm]: https://docs.rs/risc0-zkvm
+[rustup]: https://rustup.rs
+[rust-toolchain]: rust-toolchain.toml
+[twitter]: https://twitter.com/risczero
+[zkvm-overview]: https://dev.risczero.com/zkvm
+[zkhack-iii]: https://www.youtube.com/watch?v=Yg_BGqj_6lg&list=PLcPzhUaCxlCgig7ofeARMPwQ8vbuD6hC5&index=5

core/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "demo-core"
+version = "0.1.0"
+edition = "2021"
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+pathfinder2 = {git = "https://git.poeticte.ch/ajinkya/pathfinder2"}
+serde = "1.0.193"

core/src/lib.rs

@@ -0,0 +1,14 @@
+use pathfinder2::types::*;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Transfer {
+    pub path: Vec<Edge>,
+    pub amount: U256,
+}
+#[derive(Debug, Serialize, Deserialize)]
+pub struct Request {
+    pub from: Address,
+    pub to: Address,
+    pub amount: U256,
+}

deps/eth-checksum/.gitignore

@@ -0,0 +1,2 @@
+/target
+**/*.rs.bk

deps/eth-checksum/.travis.yml

@@ -0,0 +1,5 @@
+sudo: false
+language: rust
+rust:
+  - 1.3.0
+cache: cargo

deps/eth-checksum/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "eth_checksum"
+version = "0.1.2"
+authors = ["Miguel Mota <hello@miguelmota.com>"]
+description = "Ethereum address checksum"
+readme = "README.md"
+license = "MIT"
+repository = "https://github.com/miguelmota/rust-eth-checksum"
+edition = "2018"
+
+[dependencies]
+sha3 = "0.10.8"
+digest = "0.10.7"
+[[bin]]
+name = "eth_checksum"

deps/eth-checksum/LICENSE

@@ -0,0 +1,20 @@
+MIT license
+
+Copyright (C) 2017 Miguel Mota
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

deps/eth-checksum/Makefile

@@ -0,0 +1,17 @@
+all: test
+
+.PHONY: run
+run:
+	cargo run $(ARGS)
+
+.PHONY: test
+test:
+	cargo test --verbose -- --nocapture
+
+.PHONY: publish
+publish:
+	cargo publish
+
+.PHONY: example
+example:
+	cargo run --example main

deps/eth-checksum/README.md

@@ -0,0 +1,59 @@
+# eth_checksum
+
+> Ethereum address checksum library and CLI in Rust
+
+[![License](http://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/miguelmota/rust-eth-checksum/master/LICENSE) [![Build status](https://travis-ci.org/miguelmota/rust-eth-checksum.svg)](https://travis-ci.org/miguelmota/rust-eth-checksum) [![Crates.io](https://img.shields.io/crates/v/eth-checksum.svg)](https://crates.io/crates/eth-checksum)
+
+## Install
+
+```bash
+cargo install eth_checksum
+```
+
+## Getting started
+
+Using library:
+
+```rust
+extern crate eth_checksum;
+
+fn main() {
+    let addr = "0xe0fc04fa2d34a66b779fd5cee748268032a146c0";
+    let checksummed = eth_checksum::checksum(&addr);
+
+    println!("{}", checksummed);
+    // 0xe0FC04FA2d34a66B779fd5CEe748268032a146c0
+}
+```
+
+## CLI
+
+```bash
+$ eth_checksum {address}
+```
+
+Example:
+
+```bash
+$ eth_checksum 0xe0fc04fa2d34a66b779fd5cee748268032a146c0
+
+0xe0FC04FA2d34a66B779fd5CEe748268032a146c0
+```
+
+Another Example:
+
+```bash
+$ eth_checksum 0xE0FC04FA2D34A66B779FD5CEE748268032A146C0
+
+0xe0FC04FA2d34a66B779fd5CEe748268032a146c0
+```
+
+## Test
+
+```bash
+make test
+```
+
+## License
+
+[MIT](LICENSE)

deps/eth-checksum/examples/main.rs

@@ -0,0 +1,7 @@
+fn main() {
+    let addr = "0xe0fc04fa2d34a66b779fd5cee748268032a146c0";
+    let checksummed = eth_checksum::checksum(&addr);
+
+    println!("{}", checksummed);
+    assert_eq!("0xe0FC04FA2d34a66B779fd5CEe748268032a146c0", &checksummed);
+}

deps/eth-checksum/src/lib.rs

@@ -0,0 +1,48 @@
+use sha3::{Digest, Keccak256};
+
+pub fn checksum(address: &str) -> String {
+    println!("{address}");
+    let address = address.trim_start_matches("0x").to_lowercase();
+
+    let address_hash = {
+        let mut hasher = Keccak256::new();
+        hasher.update(address.as_bytes());
+        println!("{:?}", hasher);
+        hasher.finalize()
+    };
+
+    let hash_str = format!("{:x}", address_hash);
+
+    println!("{:?}", address_hash);
+    address
+        .char_indices()
+        .fold(String::from("0x"), |mut acc, (index, address_char)| {
+            // this cannot fail since it's Keccak256 hashed
+            let n = u16::from_str_radix(&hash_str[index..index + 1], 16).unwrap();
+
+            if n > 7 {
+                // make char uppercase if ith character is 9..f
+                acc.push_str(&address_char.to_uppercase().to_string())
+            } else {
+                // already lowercased
+                acc.push(address_char)
+            }
+
+            acc
+        })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_checksum() {
+        let addr_lowercase = "0xe0fc04fa2d34a66b779fd5cee748268032a146c0";
+        let checksummed = checksum(addr_lowercase);
+        assert_eq!(checksummed, "0xe0FC04FA2d34a66B779fd5CEe748268032a146c0");
+
+        let addr_uppercase = "0xE0FC04FA2D34A66B779FD5CEE748268032A146C0";
+        let checksummed = checksum(addr_uppercase);
+        assert_eq!(checksummed, "0xe0FC04FA2d34a66B779fd5CEe748268032a146c0");
+    }
+}

deps/eth-checksum/src/main.rs

@@ -0,0 +1,18 @@
+use std::env;
+use std::process;
+
+fn main() {
+    let args: Vec<_> = env::args().collect();
+
+    match args.get(1) {
+        Some(input) => {
+            let checksummed_address = eth_checksum::checksum(input);
+
+            println!("{}", checksummed_address);
+        }
+        None => {
+            println!("argument is required");
+            process::exit(1);
+        }
+    }
+}

deps/pathfinder2

@@ -0,0 +1 @@
+Subproject commit 324ecce9e7b51a547e728549241133653098e2cc

host/#Cargo.toml#

@@ -0,0 +1,12 @@
+[package]
+name = "host"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+pathfinder2 = {path = "../deps/pathfinder2"}
+demo-core = {path = "../core"}
+methods = { path = "../methods" }
+risc0-zkvm = { version = "0.19.1" }
+env_logger = "0.10"
+serde = "1.0"

host/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "host"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+pathfinder2 = {git = "https://git.poeticte.ch/ajinkya/pathfinder2"}
+demo-core = {path = "../core"}
+methods = { path = "../methods" }
+risc0-zkvm = { version = "0.19.1" }
+env_logger = "0.10"
+serde = "1.0"

host/src/main.rs

@@ -0,0 +1,74 @@
+// These constants represent the RISC-V ELF and the image ID generated by risc0-build.
+// The ELF is used for proving and the ID is used for verification.
+use methods::{METHOD_ELF, METHOD_ID};
+
+use pathfinder2::types::edge::*;
+use pathfinder2::io::*;
+
+use demo_core::Request;
+
+use std::env;
+
+use risc0_zkvm::{default_prover, ExecutorEnv};
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+    let edges_file = &args[1];
+    let edges : EdgeDB = read_edges_binary(edges_file).unwrap();
+    
+    
+    // Initialize tracing. In order to view logs, run `RUST_LOG=info cargo run`
+    env_logger::init();
+
+    // An executor environment describes the configurations for the zkVM
+    // including program inputs.
+    // An default ExecutorEnv can be created like so:
+    // `let env = ExecutorEnv::builder().build().unwrap();`
+    // However, this `env` does not have any inputs.
+    //
+    // To add add guest input to the executor environment, use
+    // ExecutorEnvBuilder::write().
+    // To access this method, you'll need to use ExecutorEnv::builder(), which
+    // creates an ExecutorEnvBuilder. When you're done adding input, call
+    // ExecutorEnvBuilder::build().
+
+    // For example:
+
+    
+    let path: Vec<Edge> = vec![Edge {
+        from: "0x9BA1Bcd88E99d6E1E03252A70A63FEa83Bf1208c".into(),
+        to: "0x42cEDde51198D1773590311E2A340DC06B24cB37".into(),
+        token: "0x9a0bbbbd3789f184CA88f2F6A40F42406cb842AC".into(),
+        capacity: "1000000000000000000".into(),
+    }];
+    let request: Request = Request {
+        from: "0x9BA1Bcd88E99d6E1E03252A70A63FEa83Bf1208c".into(),
+        to: "0x42cEDde51198D1773590311E2A340DC06B24cB37".into(),
+        amount: "2343".into(),
+    };
+
+    let env = ExecutorEnv::builder()
+        .write(&path)
+        .unwrap()
+        .write(&request)
+        .unwrap()
+        .write(&edges)
+        .unwrap()
+        .build()
+        .unwrap();
+
+    // Obtain the default prover.
+    let prover = default_prover();
+
+    // Produce a receipt by proving the specified ELF binary.
+    let receipt = prover.prove_elf(env, METHOD_ELF).unwrap();
+
+    // TODO: Implement code for retrieving receipt journal here.
+
+    // For example:
+    let _output: u32 = receipt.journal.decode().unwrap();
+
+    // Optional: Verify receipt to confirm that recipients will also be able to
+    // verify your receipt
+    receipt.verify(METHOD_ID).unwrap();
+}

host/src/main.rs~

@@ -0,0 +1,42 @@
+// These constants represent the RISC-V ELF and the image ID generated by risc0-build.
+// The ELF is used for proving and the ID is used for verification.
+use methods::{
+    METHOD_ELF, METHOD_ID
+};
+use risc0_zkvm::{default_prover, ExecutorEnv};
+
+fn main() {
+    // Initialize tracing. In order to view logs, run `RUST_LOG=info cargo run`
+    env_logger::init();
+
+    // An executor environment describes the configurations for the zkVM
+    // including program inputs.
+    // An default ExecutorEnv can be created like so:
+    // `let env = ExecutorEnv::builder().build().unwrap();`
+    // However, this `env` does not have any inputs.
+    //
+    // To add add guest input to the executor environment, use
+    // ExecutorEnvBuilder::write().
+    // To access this method, you'll need to use ExecutorEnv::builder(), which
+    // creates an ExecutorEnvBuilder. When you're done adding input, call
+    // ExecutorEnvBuilder::build().
+
+    // For example:
+    let input: u32 = 15*2^27 + 1;
+    let env = ExecutorEnv::builder().write(&input).unwrap().build().unwrap();
+
+    // Obtain the default prover.
+    let prover = default_prover();
+
+    // Produce a receipt by proving the specified ELF binary.
+    let receipt = prover.prove_elf(env, METHOD_ELF).unwrap();
+
+    // TODO: Implement code for retrieving receipt journal here.
+
+    // For example:
+    let _output: u32 = receipt.journal.decode().unwrap();
+
+    // Optional: Verify receipt to confirm that recipients will also be able to
+    // verify your receipt
+    receipt.verify(METHOD_ID).unwrap();
+}

methods/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "methods"
+version = "0.1.0"
+edition = "2021"
+
+[build-dependencies]
+risc0-build = { version = "0.19.1" }
+
+[package.metadata.risc0]
+methods = ["guest"]

methods/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    risc0_build::embed_methods();
+}

methods/guest/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "method"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+
+[dependencies]
+# If you want to try (experimental) std support, add `features = [ "std" ]` to risc0-zkvm
+risc0-zkvm = { version = "0.19.1", default-features = false,  features = ["std"] }
+pathfinder2 = { git = "https://git.poeticte.ch/ajinkya/pathfinder2"}
+demo-core = {path = "../../core", default-features = false}
+#getrandom = { version = "0.2", features = ["custom"] }
+

methods/guest/Cargo.toml~

@@ -0,0 +1,11 @@
+[package]
+name = "method"
+version = "0.1.0"
+edition = "2021"
+
+[workspace]
+
+[dependencies]
+# If you want to try (experimental) std support, add `features = [ "std" ]` to risc0-zkvm
+risc0-zkvm = { version = "0.19.1", default-features = false,  features = ['std'] }
+pathfinder2 = { path = "../../pathfinder2"}

methods/guest/src/main.rs

@@ -0,0 +1,39 @@
+#![no_main]
+
+use demo_core::{Transfer, Request};
+use pathfinder2::types::Edge;
+use pathfinder2::types::edge::EdgeDB;
+use risc0_zkvm::guest::env;
+
+risc0_zkvm::guest::entry!(main);
+
+pub fn main() {
+    let path: Vec<Edge> = env::read();
+    
+    let request: Request = env::read();
+    let db: EdgeDB = env::read();
+    if path.len() > 100 {
+        panic!("path too long!")
+    }
+
+    println!("checking path validity...");
+    let to = path.iter().fold(request.from, |acc, x| {
+        if x.from == acc && x.capacity >= request.amount && db.edges().contains(&x)
+        {
+            x.to
+        } else {
+            panic!("Path invalid")
+        }
+    });
+   assert_eq!(to, request.to, "recipient mismatch");
+    //
+    //    // iterator checks that
+    //    // to(previous) = from(current)
+    //    // from(first) = from(request)
+    //    // to(last) = to(request)
+    //    // capacity(from, to) < request.amount
+    //
+    println!("generating commitment for transfer...");
+    let amount = request.amount;
+    env::commit(&Transfer{path, amount}); // write public output to the journal
+}

methods/guest/src/main.rs~

@@ -0,0 +1,34 @@
+#![no_main]
+
+
+use risc0_zkvm::guest::env;
+use pathfinder2::*;
+
+risc0_zkvm::guest::entry!(main);
+
+pub fn main() {
+
+    let input: Vec<Edge> = env::read();
+//    // open graph data file
+//    // struct  request {from, to, amount}
+//    let path: Vec<Edge> = env::read();
+//    let request: Request = env::read();
+//    if path.len() > 100 {
+//        panic!("path too long!")
+//    }
+//    
+//    let to = path.iter().fold(request.from, |acc, x|
+//                                  if acc.from == x
+//                                  && acc.capacity >= request.amount {acc.to}
+//                                  else  panic!("Path invalid"));
+//        assert_eq!(to, request.to, "recipient mismatch");
+//        
+//    // iterator checks that
+//    // to(previous) = from(current)
+//    // from(first) = from(request)
+//    // to(last) = to(request)
+//    // capacity(from, to) < request.amount
+//
+    //    env::commit(Transfer{path, request}); // write public output to the journal
+    env::commit(&input);
+}

methods/src/lib.rs

@@ -0,0 +1 @@
+include!(concat!(env!("OUT_DIR"), "/methods.rs"));

risc0-merkle-example

@@ -0,0 +1 @@
+https://www.risczero.com/news/waldo

rust-toolchain.toml

@@ -0,0 +1,4 @@
+[toolchain]
+channel = "stable"
+components = ["rustfmt", "rust-src"]
+profile = "minimal"