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@emurgo/cardano-message-signing-asmjs

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@emurgo/cardano-message-signing-asmjs

This is a library that implements the [CIP-0008](https://github.com/cardano-foundation/CIPs/blob/master/CIP-0008/README.md) message signing spec for the Cardano blockchain.


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Message Signing

This is a library that implements the CIP-0008 message signing spec for the Cardano blockchain.

The library is composed of structs for (de)serializing the CBOR defined in CIP-0008/COSE which lays at the core of the protocol, mostly defined in lib.rs, as well as many helper utilities for more specific cases useful to CIP-0008. These are mostly in builders.rs for building the CBOR structures specific to certain algorithms.

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Building

It can be used from both rust or compiled to wasm as all public code works with wasm-bindgen via wasm-pack.

There are no rust crates/npm packages uploaded yet, but these will come in the future.

In the meantime to build a wasm package we can run one of

  • npm run rust:build-nodejs for nodejs targeted wasm
  • npm run rust:build-browser for browser targeted wasm
  • npm run asm:build for conversion for asm.js

and for use from rust simply use the lib that resides in /rust/.

Example Usage

It is important to read the CIP-0008 spec to properly understand how to use this library. As per CIP-0008/COSE, signing is done via constructing a SigStructure and then signing this with the proper keys. This can be simplified via the use of the COSESignBuilder (for multiparty signing) / COSESign1Builder (for single signer) builders. Encryption is not yet supported by this library but will be in the future. An example node.js (wasm option) project that signs a message with a Cardano address exists in the /example/ directory which has detailed comments describing each step.

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Last updated on 09 Feb 2022

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