Spruce Developer Update #6


At Spruce, we’re building a product suite to manage all aspects of the data supply chain. Here’s the latest from our development efforts


Intake is a smarter onboarding tool for businesses via secure document collection and processing. These artifacts can then be used as evidence to generate and issue credentials to the counterparty that originally uploaded them.

The focus on development has been on three areas:

  • Frontend styling, specifically for creating forms, and for users receiving information requests.
  • Event logging to give a complete picture of every action a counterparty has taken from opening a request to submitting information.
  • We have set up CI/CD towards end-to-end testing and continuous feature deployments.


DIDKit is a cross-platform toolkit for working with W3C Decentralized Identifiers (DIDs) and Verifiable Credentials (VCs).

  • DIDKit and ssi library released under Apache License, Version 2.0. Tagged release version 0.1.0.
  • Implemented did:web
  • Implemented linked data proof type for Tezos DID method (did:tz).
  • Built DIDKit CLI and HTTP server as Docker images.
  • Improved DID resolution support.
  • Adjusted API to allow for multiple DID methods derived from keypair.
  • DID method implementations modularized, making it easier to support more DID methods.
  • Updated Rust interfaces to use asynchronous I/O.
  • Documentation website launched: https://spruceid.dev/docs/didkit/
  • Added more example shell scripts.
  • Added a CHAPI wallet implementation example.
  • Added a Spring Boot example application with sign-in powered by the previously mentioned CHAPI wallet example implementation using DIDKit.
  • Added Makefile targets to build static DIDKit library files for `aarch64-apple-ios` and `x86_64-apple-ios`.
  • (Unmerged) Added WASM build support using `wasm-pack`.
  • (Unmerged) Added Node.js build support using `neon-bindings`.


Credible is Spruces native credential wallet for the consumption, storage, and presentation of Verifiable Credentials on Android and iOS.

  • Updated to make use of the official `v0.1.0` release of DIDKit.
  • Credible has now been built on iOS for the first time after DIDKit was updated, to build for `aarch64-apple-ios` and `x86_64-apple-ios`.
  • The settings were updated to include a personal profile page and pages with various notices (privacy, terms and conditions, licenses, etc).
  • There is now a DID sharing option available for users.


As a quick experiment to demonstrate method interoperability, we’ve put together a draft specification for a DID Method for the Dogecoin blockchain. Additionally, we plan on making a light rust implementation that integrates with DIDKit.

Our specification draws heavily from the work on did:btcr due to structural similarities. We managed to further improve upon the did:btcr spec with new privacy-preserving benefits.

If you would like to discuss how we would deploy the architecture described above for a specific use case, please take 30 seconds to leave us a message, and we will respond within 24 hours.

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