Revert "Remove unnecesary files"

This reverts commit c080c95.

examples/bri-3/src/bri/zeroKnowledgeProof/services/blockchain/blockchain.interface.ts

@@ -0,0 +1,6 @@
+import { Contract } from 'ethers';
+export interface IBlockchainService {
+  deployContract(contractName: string): Promise<void>;
+  connectToContract(contractName: string): Promise<Contract>;
+  storeAnchorHash(contractName: string, anchorHash: string): Promise<void>;
+}

examples/bri-3/src/bri/zeroKnowledgeProof/services/blockchain/ethereum/contracts/Ccsm.sol

@@ -0,0 +1,16 @@
+//SPDX-License-Identifier: UNLICENSED
+pragma solidity 0.8.17;
+
+contract Ccsm {
+  mapping(string => bool) public anchorHashStore;
+
+  function setAnchorHash(string calldata _anchorHash) external {
+    anchorHashStore[_anchorHash] = true;
+  }
+
+  function getAnchorHash(
+    string calldata _anchorHash
+  ) external view returns (bool) {
+    return anchorHashStore[_anchorHash];
+  }
+}

examples/bri-3/src/bri/zeroKnowledgeProof/services/blockchain/ethereum/ethereum.service.spec.ts

@@ -0,0 +1,30 @@
+import { EthereumService } from './ethereum.service';
+
+describe('Ethereum services', () => {
+  let ccsm: EthereumService;
+
+  //REMOVE THIS
+  it('empty test', async () => {
+    expect('empty').toBe('empty');
+  });
+
+  //NOTE: Commenting out the test as it requires compiled artifacts to run. RUN THIS.
+  // beforeAll(async () => {
+  //   ccsm = new EthereumService();
+  //   await ccsm.deployContract('Ccsm');
+  // });
+
+  // describe('storeAnchorHash', () => {
+  //   it('should set anchor hash in the mapping and return true', async () => {
+  //     //Arrange
+  //     const anchorHash = 'anchorHash';
+
+  //     //Act
+  //     await ccsm.storeAnchorHash('Ccsm', anchorHash);
+  //     const ccsmContract = await ccsm.connectToContract('Ccsm');
+
+  //     //Assert
+  //     expect(await ccsmContract.anchorHashStore('anchorHash')).toEqual(true);
+  //   });
+  // });
+});

examples/bri-3/src/bri/zeroKnowledgeProof/services/blockchain/ethereum/ethereum.service.ts

@@ -0,0 +1,51 @@
+import { readFile, writeFile } from 'fs/promises';
+import { Injectable, NotImplementedException } from '@nestjs/common';
+import { IBlockchainService } from '../blockchain.interface';
+import { Contract } from 'ethers';
+
+@Injectable()
+export class EthereumService implements IBlockchainService {
+  public async deployContract(contractName: string): Promise<void> {
+    throw new NotImplementedException();
+    // TODO: We need to use ethers js here for connection, not hardhat ethers
+    // const ccsmContract = await ethers.getContractFactory(contractName);
+    // const deployedCcsmContract = await ccsmContract.deploy();
+    // await this.storeDeployedContractAddress(deployedCcsmContract.address);
+  }
+
+  async connectToContract(contractName: string): Promise<Contract> {
+    throw new NotImplementedException();
+    // TODO: We need to use ethers js here for connection, not hardhat ethers
+    // const ccsmContractAddress = await this.getDeployedContractAddress();
+    // return await ethers.getContractAt(contractName, ccsmContractAddress);
+  }
+
+  public async storeAnchorHash(
+    contractName: string,
+    anchorHash: string,
+  ): Promise<void> {
+    const ccsmContract = await this.connectToContract(contractName);
+    await ccsmContract.setAnchorHash(anchorHash);
+  }
+
+  private async getDeployedContractAddress(): Promise<string> {
+    return JSON.parse(
+      (
+        await readFile(
+          './zeroKnowledgeArtifacts/blockchain/ethereum/artifacts/ccsmContractAddress.json',
+        )
+      ).toString(),
+    ).contractAddress;
+  }
+
+  private async storeDeployedContractAddress(contractAddress: string) {
+    const ccsmAddress = JSON.stringify({
+      contractAddress: contractAddress,
+    });
+
+    await writeFile(
+      './zeroKnowledgeArtifacts/blockchain/ethereum/artifacts/ccsmContractAddress.json',
+      ccsmAddress,
+    );
+  }
+}