Add Indy-Besu PoC

.github/workflows/indy-besu.yml

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+name: CI
+
+on:
+  pull_request:
+    paths: "indy-besu/**"
+
+  workflow_dispatch:
+
+jobs:
+  lint-contracts:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "20.x"
+      - name: Install dependencies
+        run: yarn install
+        working-directory: indy-besu/smart_contracts
+      - name: Lint
+        run: yarn lint-check
+        working-directory: indy-besu/smart_contracts
+
+  test-contracts:
+    needs: lint-contracts
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "20.x"
+      - name: Install dependencies
+        run: yarn install
+        working-directory: indy-besu/smart_contracts
+      - name: Unit tests
+        run: yarn test
+        working-directory: indy-besu/smart_contracts
+      - name: Run localnet
+        run: ./network/scripts/run.sh && sleep 40
+        working-directory: indy-besu
+      - name: Demos
+        run: yarn demos
+        working-directory: indy-besu/smart_contracts
+
+  lint-vdr:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install latest rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - name: Lint
+        run: cargo fmt --check
+        working-directory: indy-besu/vdr
+
+  store-artifacts:
+    needs: lint-vdr
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: "20.x"
+      - name: Install dependencies
+        run: yarn add hardhat
+        working-directory: indy-besu/smart_contracts
+      - name: Compile smart contracts
+        run: yarn compile
+        working-directory: indy-besu/smart_contracts
+      - name: Archive contract artifacts
+        uses: actions/upload-artifact@v3
+        with:
+          name: smart-contracts-artifacts
+          path: indy-besu/smart_contracts/artifacts/**
+          retention-days: 3
+
+  test-vdr:
+    needs: store-artifacts
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install latest rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - name: Download contract artifcats
+        uses: actions/download-artifact@v3
+        with:
+          name: smart-contracts-artifacts
+          path: indy-besu/smart_contracts/artifacts
+      - name: Run localnet
+        run: ./network/scripts/run.sh && sleep 40
+        working-directory: indy-besu
+      - name: Test
+        run: cargo test --features=ledger_test -- --test-threads=1
+        working-directory: indy-besu/vdr

indy-besu/.env

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+# This file defines environment variables defaults for Docker-compose
+# but we also use it for shell scripts as a sourced file
+
+BESU_VERSION=23.7.3
+QUORUM_VERSION=23.4.0
+ETHSIGNER_VERSION=22.1.3
+
+LOCK_FILE=.localnet.lock
+
+# GoQuorum consensus algorithm
+# istanbul, qbft, raft
+# !!! lower case ONLY here
+GOQUORUM_CONS_ALGO=qbft
+
+# Besu consensus algorithm
+# IBFT, QBFT, CLIQUE
+# PLEASE NOTE: IBFT used here refers to IBFT2.0 and not IBFT1.0 More information can be found https://besu.hyperledger.org/en/latest/HowTo/Configure/Consensus-Protocols/IBFT/
+# We use IBFT here to keep the API names consistent
+# !!! upper case ONLY here
+BESU_CONS_ALGO=QBFT

indy-besu/.gitignore

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+.DS_Store
+node_modules
+.vscode
+logs
+.localnet.lock
+.idea
+vdr/target

indy-besu/README.md

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+**This is not an official Indy Ledger code yet, but an experimental proof of concept (PoC). The goal is to prove a possibility to use Indy Besu as a foundation for Indy Ledger and show how it can be done.
+The code and PoC may be moved to a separate Indy repository later for further development.**
+
+# Indy Besu ledger
+
+## Plan for making this code official 
+Proposed by @TelegramSam in #1826 
+>- Work is created in new repositories
+>    - I understand a previous conversation decided to put the work in indy-node. I think this decision should be changed.
+>    - This will help the work move faster with less community bottlenecks.
+>- Related work should be clearly labeled as experimental or research
+>    - This includes a did method definition, for example
+>- Advance the project so that we are able to test the properties of the project, including speed, scale, bandwidth, processor load, and energy use.
+>- Delay commitment to the new approach until we reach sufficient confirmation of approach validity.
+
+## Goals and ideas
+
+*  Prove a possibility of replacement for [Hyperledger Indy](https://www.hyperledger.org/projects/hyperledger-indy) ecosystem that provides support for verifiable credentials:
+  * Components to replace:
+    * Distributed ledger: [Indy Node](https://github.com/hyperledger/indy-node) and [Indy Plenum](https://github.com/hyperledger/indy-plenum)
+    * Client library: [Indy SDK](https://github.com/hyperledger/indy-sdk/tree/main)
+  * Capability to migrate the data from the original Indy Ledger
+* Distributed ledger requirements:
+  * Public Permissioned Blockchain
+    * Control the validator nodes 
+    * Control the user permissions
+  * EVM compatible Blockchain
+    * Capability to deploy on different networks
+  * Based on existing open-source blockchain framework with a good performance, sufficient adoption, and wide community
+  * Capability to work without tokens and fees
+  * Stable consensus protocol
+* Functional requirements:
+  * Interoperability:
+    * Capability to use existing DID's and identifiers:
+      * Support [indy](https://hyperledger.github.io/indy-did-method/) DID method  
+      * Support [sov](https://sovrin-foundation.github.io/sovrin/spec/did-method-spec-template.html) DID method
+      * Identifiers previously stored on the client side should be resolvable on the new Ledger
+    * Capability to use the ledger as an [AnonCreds Registry](https://hyperledger.github.io/anoncreds-methods-registry/)
+    * Compatibility with the latest [AnonCreds Specification](https://hyperledger.github.io/anoncreds-spec/)
+  * Extensibility: 
+    * Capability to integrate new pieces of functionality easily
+    * Capability to use [ETHR](https://github.com/decentralized-identity/ethr-did-resolver/blob/master/doc/did-method-spec.md) DID method
+      * Integration with the [AnonCreds Registry](https://hyperledger.github.io/anoncreds-methods-registry/)
+      * Integration with `Permissioned` modules
+  * Data validity:
+    * Neglect `gas` efficiency in favour general validation of the stored data
+      * Basic [DID Documents](https://www.w3.org/TR/did-core/) validation
+      * Basic [AnonCreds entities](https://hyperledger.github.io/anoncreds-spec/#anoncreds-setup-data-flow) validation
+      * Basic state consistency validation
+
+## Design documentation
+
+See [design document](./docs/README.md) covering the main ledger aspects.
+
+## Running local network
+
+### Prerequisites
+
+- [Docker and Docker-compose](https://docs.docker.com/compose/install/) v2 or higher
+
+> ⚠️ **Note**: If on MacOS or Windows, please ensure that you allow docker to use upto 4G of memory under the _Resources_ section. The [Docker for Mac](https://docs.docker.com/docker-for-mac/) and [Docker Desktop](https://docs.docker.com/docker-for-windows/) sites have details on how to do this at the "Resources" heading
+
+### Commands
+
+* **Start the network: - run all services inside the docker containers**
+    ```bash
+    ./network/scripts/run.sh
+    ```
+
+* **Stop the network: run the entire network, and you can resume where it left off with `./resume.sh`**
+    ```bash
+    ./network/scripts/stop.sh
+    ```
+
+* **Remove the network: stop and then remove all containers and images**
+    ```bash
+    ./network/scripts/remove.sh
+    ```
+
+## Managing smart contracts
+
+See [README.md](/smart_contracts/README.md).
+
+