Understanding Metamask deals local vs. Remote networks
As a developer known for its Ethereum -based blockchain networks, you are probably not unfamiliar with Web3 technology and their complexity. However, when it comes to interaction with the Ethereum network from the outside of the local node (i.e. working in a web browser or an environment that is not in the local environment), it is crucial to understanding how to sign and send transactions via Metamka. In this article, we will delve into the Ethereum decentralized application (DAPP) and the world of smart contracts, exploring how Metamk facilitates this interaction on local and remote networks.
What is Metamk?
Metamk is a popular browser extension that allows users to interact with their digital wallets above the Ethereum network. It provides interface to history, manage and send Ethereum transactions without requiring and installing additional software. Using Metamask, developers can access the local wallet, send an ether (ETH) and make various smart contract interactions from the web browser.
Local knot vs. Remote Network
When operating with the local node, Metamk acts as a mediator between the user device and the Ethereum network. Here, when interacting with remote networks, things become interesting.
About the local node:
- The user can create DAPP using tools such as Web3.Js or Ethers.Js, which interact with the local Ethereum blockchain.
- When the user wants to serve the ether or execute the interaction of smart contracts on the local network, they use Metamk to sign and transaction transactions in the local purse.
- Metamk checks the transaction and sends it to the Ethereum network where it is executed.
In contrast:
Interacting with distant networks (i.e. acting not in the local environment):
- The user must have an external browser or knot setup to connect to the Ethereum network.
- After connection, the user can create DAPP using tools such as Web3 or Ethers.Js, which interacts with the local Ethereum blockchain on behalf of the user.
- When the user wants to serve the ether or execute the interaction of smart contracts on the remote network, he or she must use Metamk on the external browser or knot as an intermediary.
How to sign and send transactions in the local node
Sign and send transactions in Metamask when running with a local node:
- Install web3.js or ethers.js using NPM or yarn.
- Create a new DAPP using your chosen tool such as truffle or remix.
- Import the necessary libraries (eg web3) in the DAPP code and initialize your wallet with metamas.
- Use the “Web3.eth.sendtransaction ()” to create a deal and sign it with a local Metamask purse.
Here is an example:
`JavaScript
Const web3 = ask ('web3');
Const Web3 = New Web3 (window.ethereum);
// Create a new DAPP contract
Contract = new Web3.eth.Contract (
'0x ... your-a-life-adDress ...', // both
'0x ... your-a-life-funcion-name ...' // Function name
);
- Use
Web3.eth.sendtransaction ()to create and sign the transaction by transferring to the object “Agreement” and your local Metamask Wallet information.
How to sign and send transactions in a remote network
To sign and send transactions in Metamask when running remotely:
- Install the NODE.Js environment (such as Node.Js CLI) on the external device.
- Create an Ethereum account and set up the Metamask Extension in the browser or mobile app.
- Use “Web3.eth.sendtransaction ()” in the DAPP code to create a deal and sign it with a local Metamask wallet.
Here is an example:
“ JavaScript
Const web3 = ask (‘web3’);
Const Web3 = New Web3 (New Web3.Providers.httprovider (‘
// Create a new DAPP contract
Contract = new Web3.eth.Contract (
‘0x …