# Initialization

### TypeScript SDK

Each action described in the following sections requires an initialised coreSDK instance. It can be done using the following snippet. When there are multiple actors involved in some flow, each of them needs its own instance./

```typescript
import { Contract, providers, utils, Wallet } from "ethers";
import { CoreSDK, getEnvConfigById } from "@bosonprotocol/core-sdk";
import { EthersAdapter } from "@bosonprotocol/ethers-sdk";

const envName = "testing"; // amoy testnet
const configId = "testing-80002-0";

const defaultConfig = getEnvConfigById(envName, configId);
const ethereumProvider = new providers.JsonRpcProvider(
  "https://yourEthereumRPCProvider"
);

const signerWallet = Wallet.createRandom(ethereumProvider);
const coreSDK = CoreSDK.fromDefaultConfig({
    envName,
    configId,
    web3Lib: new EthersAdapter(provider, signerWallet),
  });
```

To use the coreSDK with the testnet or production protocols, the following parameters can be used.

|                  | envName    | configId           |
| ---------------- | ---------- | ------------------ |
| Amoy             | testing    | testing-80002-0    |
| Sepolia          | testing    | testing-11155111-0 |
| Base Sepolia     | testing    | testing-84532-0    |
| Optimism Sepolia | testing    | testing-11155420-0 |
| Arbitrum Sepolia | testing    | testing-421614-0   |
| Polygon          | production | production-137-0   |
| Ethereum         | production | production-137-0   |
| Base             | production | production-8453-0  |
| Optimism         | production | production-10-0    |
| Arbitrum         | production | production-42161-0 |


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