Understanding Metamask Balance updates
In this article we will deepen how Metamask, a popular Ethereum and Dapp Builder portfolio, monitors the updated balance sheets of your tokens based on ERC20 (Ethereum -based marker).
Magic of Metamask Balance updates
When creating a blockchain platform account such as Metamask or Truffle Suite, you are essentially registering for a user interface that interacts with various smart contracts, including those that manage your digital assets. One such contract is the ERC20 standard, which allows developers to build applications based on markers.
The background process: Balances
When an ERC20 transfer happens, it’s not just just “moving from one portfolio to another”. Instead, it involves updating the balance of the two countries involved in the transaction. In Metamask, this process is processed by a background thread that periodically works on your device.
Here’s what is happening:
- Event listeners : When a transfer of ERC20 happens, you will get notifications from Metamask through events of the events (for example,
onransfer 'event). These events of the events are attached to the intelligent contract that governs your tokens.
- Balance update
: When the events listener find a new transfer, it triggers an update of the balance of the two parties involved in the transaction. This is done by requesting the internal status of the contract and accordingly updating the propertyoralalsupply
.
- Update in the background thread : Then the updated value is sent to the background of Metamask using Websockets or IPC (interpreonal communication) mechanisms.
Who calls on balance ()
In order to understand what is happening behind the scenes, we need to look at another decisive feature:Balanceof (). This method is called by the intelligent contract on behalf of your portfolio when you ask its balance:
* Balance updates : When you callBalanceof ()from Metamask, he triggers a request for the internal status of the contract. The contract meets the current balance sheet value.
* WebSockets or IPC : If you are using WebSockets or IPC (eg web3.js), you will send an application to the end point of the contract and receive the answer immediately.
In summary
METAMASK monitors your ERC20 tokens Balances through:
- Performing periodic background threads that update the balance sheet values for each transferred marker.
- Attaching events to intelligent contracts that manage your tokens that trigger updates when an event occurs (for example,Onransfer ‘event).
- Using WebSockets or IPC mechanisms to send requests from Metamask to the internal status of the contract and receive answers.
Understanding how balance is updated in Metamask, you can better appreciate the complexity of managing your digital assets on a blockchain platform like Ethereum.
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