How Metamask pulls the portfolio data: a deep dive
As one of the most commonly used Ethereum portfolios, Metamask has become an essential tool for decentralized applications (Dapps) and smart contracts in the Ethereum blockchain. However, under its elegant interface, there is a complex system that recovers data from the portfolio of various sources. In this article, we will deepen how Metamask pulls the portfolio data and exploit possible safety concerns.
Connecting to the Explorers Block
When you connect Metamask to an Ethereum node, it sets a connection to the Block Explorer API. The API is used to recover information about the next blocks, including the difficulty level and estimated gas prices. Here is a simplified overview of how Metamask connects:
- API Request
: When you call the
eth_blocknumber method ()on metamask, it sends an http request to the Block Explorer API (for example, [EtherScan] ( /) With your Ethereum address as a parameter.
- Answer : API response contains information about the current block, including its number, difficulty level and estimated gas prices for the next blocks.
Wallet data sources
Metamask recovers data from the portfolio of various sources, making it difficult to identify the exact data source:
- Node connections : Metamask connects to the Ethereum nodes in blockchain, responsible for storing and updating portfolio data.
- API Block Explorer : As mentioned earlier, Metamask uses the Block Explorer API to recover information about the next blocks.
- Local storage : Metamask stores wallet data locally on the device, which includes:
* Wallet address
* Private key (hash)
* Public Key (Hashed)
* Transaction history
Possible security concerns
Although Metamask is designed to be safe, there are potential risks associated with its data recovery:
- API Exposure : When connecting to the Block Explorer API, Metamask exposes the portfolio data to unauthorized parties.
- Node connection vulnerabilities
: If a malicious knot is compromised or hacked, you can steal the portfolio data.
- Local storage risks : If a device is lost or stolen, your local storage containing confidential information may be vulnerable to theft.
mitigating risks
To minimize possible safety concerns:
- Use strong passwords and 2fa : Protect your metamask account with a strong password and activate the authentication of two factors (2FA) whenever possible.
- Check that API requests : Check regularly the Ethereum API documentation to ensure that you are using the correct parameters and response formats.
- Monitor Local Storage : Keep an eye on the local storage of your device for any suspicious activity related to Metamask.
In conclusion, while Metamask is designed to recover portfolio data from various sources, there are possible security concerns associated with your data recovery. By being aware of these risks and taking action to mitigate them, you can take advantage of the benefits of using metamask without compromising your confidential information.