TypeScript implementation of Signify

Project Name: signify-ts

Signify - KERI Signing at the Edge

Of the five functions in a KERI agent,

1. Key generation
2. Encrypted key storage
3. Event generation
4. Event signing
5. Event Validation

Signify-TS splits off two, key generation and event signing into a TypeScript library to provide "signing at the edge". It accomplishes this by using libsodium to generate ed25519 key pairs for signing and x25519 key pairs for encrypting the private keys, next public keys and salts used to generate the private keys. The encrypted private key and salts are then stored on a remote cloud agent that never has access to the decryption keys. New key pair sets (current and next) will be generated for inception and rotation events with only the public keys and blake3 hash of the next keys made available to the agent.

The communication protocol between a Signify client and KERI agent will encode all cryptographic primitives as CESR base64 encoded strings for the initial implementation. Support for binary CESR can be added in the future.

Environment Setup

The code is built using Typescript and running code locally requires a Mac or Linux OS.

• Install Node.js

• Install dependencies:

  npm install

Typescript source files needs to be transpiled before running scripts or integration tests

• Generate types:

  To generate TypeScript types from KERIA OpenAPI docs dynamically

  npm run generate:types
  

  We can specify KERIA spec url by this command:

  SPEC_URL=http://localhost:3902/spec.yaml npm run generate:types
  

• Build:

  npm run build

• ready() must be called before library is useable. Example minimum viable client code.

  import{randomPasscode,ready,SignifyClient,Tier}from'signify-ts';awaitready();constbran=randomPasscode();consturl='http://127.0.0.1:3901';constboot_url='http://127.0.0.1:3903';constactualSignifyClient=newSignifyClient(url,bran,Tier.low,boot_url);console.log(actualSignifyClient);

Unit testing

To run unit tests

npm test

Integration testing

The integration tests depends on a local instance of KERIA, vLEI-Server and Witness Demo. These are specified in the Docker Compose file. To start the dependencies, use docker compose:

docker compose up --wait

If successful, it should print something like this:

$ docker compose up --wait
[+] Running 4/4
✔ Network signify-ts_default Created 0.0s
✔ Container signify-ts-vlei-server-1 Healthy 5.7s
✔ Container signify-ts-keria-1 Healthy 6.2s
✔ Container signify-ts-witness-demo-1 Healthy 6.2s

It is possible to change the keria image by using environment variables. For example, to use weboftrust/keria:0.1.3, do:

export KERIA_IMAGE_TAG=0.1.3
docker compose pull
docker compose up --wait

To use another repository, you can do:

export KERIA_IMAGE=gleif/keria
docker compose pull
docker compose up --wait

Use the npm script "test:integration" to run all integration tests in sequence:

npm run test:integration

To execute a specific integration test, you can use:

npm run test:integration -- test-integration/credentials.test.ts

It is also possible to run the tests using local instances of vLEI, Keria, and witness network. Set the environment variable TEST_ENVIRONMENT to local, e.g:

TEST_ENVIRONMENT=local npm run test:integration test-integration/credentials.test.ts

This changes the discovery urls to use localhost instead of the hostnames inside the docker network.

Diagrams

Account Creation Workflow

Publishing

This package is published on npm: https://www.npmjs.com/package/signify-ts.

If you need to publish a version under your own scope, you can use the publish script. This enables you to create development packages. For example:

NPM_PACKAGE_SCOPE=@myorg DRY_RUN=1 ./publish.sh
npm notice Tarball Details
npm notice name: @myorg/signify-ts
npm notice version: 0.3.0-rc1-dev.8fa9919
npm notice filename: myorg-signify-ts-0.3.0-rc1-dev.8fa9919.tgz
npm notice package size: 81.0 kB
npm notice unpacked size: 370.0 kB
npm notice shasum: 8c160bc99d9ec552e6c478c20922cae3388a8ace
npm notice integrity: sha512-WRuD5PKFN3WBl[...]xVieCIS0UpVeg==
npm notice total files: 96
npm notice
npm notice Publishing to https://registry.npmjs.org/ with tag dev and default access (dry-run)
+ @myorg/signify-ts@0.3.0-rc1-dev.8fa9919

Set the NPM_PUBLISH_TAG to latest to skip the commit hash suffix in the version:

NPM_PUBLISH_TAG=latest NPM_PACKAGE_SCOPE=@myorg DRY_RUN=1 ./publish.sh
npm notice Tarball Details
npm notice name: @myorg/signify-ts
npm notice version: 0.3.0-rc1
npm notice filename: myorg-signify-ts-0.3.0-rc1.tgz
npm notice package size: 80.9 kB
npm notice unpacked size: 370.0 kB
npm notice shasum: 8c9e4edcf19802e8acaf5996a36061a9c335b1c4
npm notice integrity: sha512-V1y2W3zs4Ccsn[...]vKY3WWgalcuBQ==
npm notice total files: 96
npm notice
npm notice Publishing to https://registry.npmjs.org/ with tag latest and default access (dry-run)
+ @myorg/signify-ts@0.3.0-rc1