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Providers

Providers are responsible for interacting with Ethereum nodes and bundlers. They enable sending raw RPC calls and facilitate communication between a flutter app and the Ethereum network. Three main providers: Base RPC, Bundler Provider, and JSONRPC Provider are included.

Base RPC Service

The RPC Service is the foundation that the Bundler Provider and JSONRPC Provider use to send raw RPC calls to Ethereum nodes. It provides a simple and consistent interface for making RPC requests and handling responses.

The Base RPC extends the JsonRPC class and serves as the base class for RPC communication. It takes a URL as a parameter, which represents the endpoint of the Ethereum node or bundler to interact with.

Constructor

RPCBase(String url)

Creates a new instance of the RPCBase class with the specified URL.

Methods

  1. send 
Future<T> send<T>(String function, [List<dynamic>? params])

Asynchronously sends an RPC call to the Ethereum node for the specified function and parameters.

Parameters:

  • function: The Ethereum RPC function to call (e.g., eth_getBalance).
  • params: Optional parameters for the RPC call.

Returns:

A Future that completes with the result of the RPC call.

Example:

var result = await send<String>('eth_getBalance', ['0x9876543210abcdef9876543210abcdef98765432']);

Usage

To use the RPC Service, you need to create an instance of the RPCBase class with the desired URL:

final rpcService = RPCBase('https://mainnet.infura.io/v3/your-api-key');

Once you have an instance of the RPC Service, you can make RPC calls using the send method:

final balance = await rpcService.send<String>('eth_getBalance', ['0x9876543210abcdef9876543210abcdef98765432']);
print('Account balance: $balance');