feat: use hardhat in v3 tests, kapi image

Dockerfile.hardhat.yml

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+FROM node:18.14.2
+
+WORKDIR /app
+
+COPY hardhat.config.ts ./hardhat.config.ts
+
+RUN npm install -g hardhat
+
+
+CMD ["npx", "hardhat", "node"]

docker-compose.e2e-v3.yml

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+version: '3.7'
+
+services:
+  e2e_pgdb:
+    container_name: e2e_pgdb
+    image: postgres:14-alpine
+    restart: unless-stopped
+    environment:
+      - POSTGRES_DB=node_operator_keys_service_db
+      - POSTGRES_USER=postgres
+      - POSTGRES_PASSWORD=postgres
+    expose:
+       - "5432:5432"
+    ports:
+       - "5433:5432"
+    volumes:
+      - ./.volumes/pgdata-17000/:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
+  hardhat_node:
+    container_name: hardhat_node
+    build:
+      context: .
+      dockerfile: Dockerfile.hardhat.yml
+    ports:
+      - "8545:8545"
+    environment:
+      - FORK_URL=${FORK_URL}
+      - FORK_BLOCK=${FORK_BLOCK}
+      - WALLET_PRIVATE_KEY=${WALLET_PRIVATE_KEY}
+    volumes:
+      - .:/app
+    healthcheck:
+      test: ["CMD-SHELL", "curl -s http://127.0.0.1:8545 >/dev/null || exit 1"]
+      interval: 10s
+      retries: 10
+
+  e2e_keys_api:
+    container_name: e2e_keys_api
+    image: lidofinance/lido-keys-api:staging
+    command: ["yarn", "start:dev"]
+    platform: linux/amd64
+    environment:
+      - NODE_ENV=production
+      - DB_NAME=node_operator_keys_service_db
+      - DB_PORT=5432
+      - DB_HOST=e2e_pgdb
+      - DB_USER=postgres
+      - DB_PASSWORD=postgres
+      - PROVIDERS_URLS=http://hardhat_node:8545
+      - VALIDATOR_REGISTRY_ENABLE=false
+      - CHAIN_ID=17000
+      - CL_API_URLS=""
+    depends_on:
+      e2e_pgdb:
+        condition: service_healthy
+    ports:
+      - "3000:3000"
+
+    links:
+      - e2e_pgdb

hardhat.config.ts

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+import { HardhatUserConfig } from 'hardhat/config';
+import * as dotenv from 'dotenv';
+dotenv.config();
+// for v3 version
+export const FORK_BLOCK = 2038357;
+
+// TODO: add check that RPC_URL is for holesky
+// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+const RPC_URL = process.env.FORK_URL!;
+// eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+const secretKey = process.env.WALLET_PRIVATE_KEY!;
+
+const config: HardhatUserConfig = {
+  networks: {
+    hardhat: {
+      forking: {
+        url: RPC_URL,
+        // use latest
+        blockNumber: FORK_BLOCK,
+      },
+      chainId: 17000,
+      accounts: [
+        {
+          privateKey: secretKey,
+          balance: (BigInt(1e18) * BigInt(100)).toString(),
+        },
+      ],
+    },
+  },
+  solidity: '0.8.4',
+};
+
+export default config;