Tips for monitoring transactions/events on a particular wallet with ethers.js?

Is there a method to monitor all transactions labeled as "mint" occurring on a designated wallet using ethers.js? While I am aware of the option to establish a filter for tracking a particular event signature, my aim is to keep tabs on all "mint" events, even if they exhibit distinct individual signatures.

Presently, this is what I have in place, although it solely follows a specific event signature:

const filter = [
    ethers.utils.id("Mint(address,uint256)"),
    null,
    [ethers.utils.hexZeroPad(address, 32)],
]

provider.on(filter, (log, event) => {
    // process event
})

Mint events may vary in terms of arguments such as amounts and types. Is there a solution available to track all occurrences with the same name ("Mint"), but possessing differing arguments?

Could someone shed light on whether it's feasible to oversee all transactions happening on a designated wallet and retrieve the emitted events from each transaction?

Answer №1

The transaction receipt does not contain the event name, making it impossible to filter for events with "XYZ" in their name.

Instead, the transaction receipt stores the event selector, a keccak-256 hash of the event name and argument types found in topics[0] of each event log within the receipt.

For instance:

  • Mint(address,uint256) =>
    0x0f6798a560793a54c3bcfe86a93cde1e73087d944c0ea20544137d4121396885
  • Mint(address) =>
    0x3c3284d117c92d0b1699230960384e794dcba184cc48ff114fe4fed20c9b0565
  • MintToken(address,uint256) =>
    0xdcdea898caf5576419f89caf69301592a4758349a0bd62300b58849213420a72

To track specific events, you must create a list of event signatures (the value of topics[0]) and filter against them accordingly.

It's worth noting that there are also anonymous events that do not store their selector at all, but this should not affect your situation.


Is there a way to monitor all transactions occurring on a particular wallet and view the emitted events from each transaction?

This functionality is not provided by the standardized JSON RPC API. To achieve this, you'll need to develop a collector service that captures all blocks and transactions, retrieves their receipts, and then forwards relevant information to another service.

Alternatively, you can utilize a third-party service that handles this process in the background and notifies you via webhook or other means whenever a transaction involving any of your specified addresses takes place.

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