ethereum-transaction-debugger

Solidity debugger library

Required Parameters

To start the debugger session, you'll need the following parameters:

• txHash - A transaction hash (prefixed with 0x), for the transaction to debug

• provider - A ethers.js provider instance (see ethers.js)

• contracts - An array of contract objects, with the following properties:

  • contractName - The name of the contract
  • source - The full Solidity source code
  • sourcePath - (optional) the path to the Solidity file on disk
  • ast - The Solidity compiler's output AST (new style, not legacyAST)
  • binary - 0x-prefixed string with the binary used to create a contract instance
  • sourceMap - The Solidity compiler output source map for the creation binary
  • deployedBinary - 0x-prefixed string with the on-chain binary for a contract instance
  • deployedSourceMap - The source map corresponding to the on-chain binary (from the Solidity compiler)

• files - An array of sourcePaths representing file indexes (For example: /Users/username/etherlimeProject/contracts/LimeFactory.sol)

Run

1. Start the debugger session by constructing a Debugger instance with .forTx() and then .connect() to it:

import Debugger from "ethereum-transaction-debugger";

let bugger = await Debugger
  .forTx(txHash, { contracts, files, provider });

let session = bugger.connect();

2. Resolve the session's ready() promise:

await session.ready();

3. Use the provided public methods on the session instance in order to step through the trace for the transaction:

session.stepNext();
session.stepOver();
session.stepInto();

4. Access data provided by the debugger via the session.view() interface, and the provided selectors:

let { ast, data, evm, solidity, trace } = Debugger.selectors;

let variables = session.view(data.current.identifiers.native);
let sourceRange = session.view(solidity.current.sourceRange);

License

MIT (c) 2019 Truffle, LimeChain LTD