CACAOs

CACAOs is a Rust library implementing the CAIP-74 Chain-Agnostic Object Capability Specification, with built in support for Sign In With Ethereum.

Example

A simple example using SIWE-type CACAOs:

``` rust use cacaos::{Payload, BasicSignature, cacao_siwe::SignInWithEthereum, SignatureScheme}; use hex::FromHex; use siwe::Message; use std::str::FromStr; use libipld::{codec::Encode, cbor::DagCborCodec, multihash::Code, Block};

let message: Payload = Message::from_str( r#"localhost:4361 wants you to sign in with your Ethereum account: 0x6Da01670d8fc844e736095918bbE11fE8D564163

SIWE Notepad Example

URI: http://localhost:4361 Version: 1 Chain ID: 1 Nonce: kEWepMt9knR6lWJ6A Issued At: 2021-12-07T18:28:18.807Z"#, ) .unwrap() .into();

let sig = >::fromhex(r#"6228b3ecd7bf2df018183aeab6b6f1db1e9f4e3cbe24560404112e25363540eb679934908143224d746bbb5e1aa65ab435684081f4dbb74a0fec57f98f40f5051c"#).unwrap().tryinto().unwrap();

// verify a siwe signature SignInWithEthereum::verify(&message, &sig) .await .unwrap();

// sign the message to create a cacao let cacao = message.sign::(&message, &sig);

// ipld-encode the cacao let block = Block::encode(DagCborCodec, Code::Blake3_256, &cacao).unwrap(); ```

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