README.md

Compound Token Stats (APR Proof)

An example that calls multiple view functions on the Compound USDC contract to compute the APR.

Prerequisites

To get started, you need to have Rust installed. If you haven't done so, follow the instructions here.

Next, you will also need to have the cargo-risczero tool installed following the instructions here.

You'll also need access to an Ethereum Mainnet RPC endpoint. You can for example use ethereum-rpc.publicnode.com or a commercial RPC provider like Alchemy.

Run the example

To run the example, which computes the current APR of the Compound USDC Token 0xc3d688B66703497DAA19211EEdff47f25384cdc3 on Ethereum, execute the following command:

RPC_URL=https://ethereum-rpc.publicnode.com RUST_LOG=info cargo run --release

The output should resemble the following:

2024-08-05T17:58:28.709271Z  INFO risc0_steel::host: Environment initialized for block 20464007    
2024-08-05T17:58:28.709406Z  INFO risc0_steel: Commitment to block 0xba19f4d5d1aabd1e4ddca7263f1307cfdec1252041395edfc1d8507eaf142cf8    
2024-08-05T17:58:28.709502Z  INFO risc0_steel::contract: Executing preflight calling 'getUtilization()' on 0xc3d688B66703497DAA19211EEdff47f25384cdc3    
Call getUtilization() Function on 0xc3d6…cdc3 returns: 715303307067353898
2024-08-05T17:58:29.974428Z  INFO risc0_steel::contract: Executing preflight calling 'getSupplyRate(uint256)' on 0xc3d688B66703497DAA19211EEdff47f25384cdc3    
Call getSupplyRate(uint256) Function on 0xc3d6…cdc3 returns: 1179470191
Running the guest with the constructed input:
2024-08-05T17:58:31.587359Z  INFO executor: risc0_zkvm::host::server::exec::executor: execution time: 196.721584ms
2024-08-05T17:58:31.587385Z  INFO executor: risc0_zkvm::host::server::session: number of segments: 11
2024-08-05T17:58:31.587388Z  INFO executor: risc0_zkvm::host::server::session: total cycles: 11534336
2024-08-05T17:58:31.587390Z  INFO executor: risc0_zkvm::host::server::session: user cycles: 8885255
Proven APR calculated is: 3.7195771943376%