ChainPal

ChainPal is a handy CLI tool for developers working with EVM-like chains. It provides various useful utilities for conversion, address verification, gas estimation, processing transaction data from CSV files, and more.

Installation

To install ChainPal, run the following command:

npm install -g chain-pal

ChainPal provides several commands to work with blockchain data:

Convert a value between hex and decimal and vice versa.

chain-pal convert <value>

• value: The value in hex or decimal format to be converted.

Convert a value in wei to gwei and ether, considering token decimals

chain-pal convert-unit-wei <value> <decimals>

• value: The value in wei to be converted.
• decimals: The number of decimals for the token (default: 18).

Convert a value in gwei to wei and ether, considering token decimals

chain-pal convert-unit-gwei <value> <decimals>

• value: The value in gwei to be converted.
• decimals: The number of decimals for the token (default: 18).

Convert a value in ether to wei and gwei, considering token decimals

chain-pal convert-unit-ether <value> <decimals>

• value: The value in ether to be converted.
• decimals: The number of decimals for the token (default: 18).

Process a CSV file containing transactions and output the transaction details,

considering the gas price and gas limit for EVM-like chains

chain-pal process-csv <httpEndpoint> <csvFilePath>

• httpEndpoint: The HTTP endpoint for the JSON-RPC provider. It can be https://ethereum.publicnode.com

• csvFilePath: The file path of the CSV to be processed.

• must have the following format:

  amountWei	from	to
  10000000000000000000	0x71508f88e558b414f8a65b3b56362bfb7a9652b8	0xed1052b6017745d1fab9f0a0b10bc81bba6b5068

Checks if an address is a smart contract or not.

chain-pal is-contract <httpEndpoint> <address>

httpEndpoint: The HTTP endpoint for the JSON-RPC provider. It can be https://ethereum.publicnode.com

• address: The address to be checked.

Verify the validity of an EVM address.

chain-pal is-valid <address>

• address: The address to verify.

Estimates gas given from, to, and value.

chain-pal estimate-gas <httpEndpoint> <from> <to> <value>

• httpEndpoint: The HTTP endpoint for the JSON-RPC provider. It can be https://ethereum.publicnode.com
• from: The source address.
• to: The target address.
• value: The transaction value.

Encode a function signature based on the input

chain-pal encode-signature <signature>

• signature: Keccak256 function to be encoded. e.g approve(address,uint256)