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Polygon bor-receipt Checker

This script is used to check for the existence of Polygon bor-receipts in a specified range of blocks. A bor-receipt is a special kind of receipt that is emitted when a validator confirms a block on the Polygon network. These receipts are important because they are used to prove that a block has been confirmed by a validator, which is necessary for finality on the Polygon network.

The goal of this script is to make sure the RPC node contains all the bor-receipts that are expected to exist in a given a starting block number.

Prerequisites

  • Node.js
  • npm
  • web3.js
  • semaphore-async-await

Installation

  1. Clone the repository
  2. Run npm install to install the dependencies

Usage

The script can be run with the following command:

node check.js --url <JSON-RPC node URL> --start-block <starting block number>

Options

--version      Show version number                               [boolean]
-u, --url          HttpProvider URL                        [string] [required]
-c, --max-calls    Maximum concurrent calls             [number] [default: 10]
-s, --start-block  Start block number. Has to be a multiple of 64.
[number] [required]
--help         Show help                                         [boolean]

Example

The following command checks for bor-receipts from block number 38598848, using a maximum of 10 concurrent calls to the JSON-RPC endpoint located at http://10.1.1.80:8765:

    node check.js --url http://10.1.1.80:8765 --max-calls 10 --start-block 38598848

Output

The script outputs a list of block numbers that are missing bor-receipts. If the list is empty, then all bor-receipts are present.