Shadow Arena #005: Canto v2 Lending Market

Canto's Lending Market is a Compound V2 fork with a twist: a custom algorithmic stablecoin (cNote), modified interest rate model where supply rate equals borrow rate, and generic ERC-20 reward distribution instead of COMP. The bugs are almost a syllabus for 'what goes wrong when you fork Compound V2 and modify the core parameters.'

Scope (2000 SLOC)

File	SLOC	Description
Lending/Comptroller.sol	735	Modified Comptroller with generic reward distribution
Lending/CToken.sol	500	CToken with Canto-specific modifications
Lending/NoteInterest.sol	100	Custom interest rate model: supply rate = borrow rate
Lending/Accountant.sol	150	Treasury and liquidity management for cNote
Lending/CNote.sol	200	Algorithmic stablecoin lending market
Lending/Treasury.sol	100	Protocol treasury management

Documentation

Source Code Protocol Docs

Part of the Compound V2 Path

This shadow audit connects to the Compound V2 Build module. Students who built the lending protocol have an advantage because they understand the core architecture.

View Build Module

Duration4 days

Total Findings10

Scope2000 SLOC

PriceFree