PToken

ReceiptVault is the market contract for a single asset. It holds underlying tokens, mints pTokens, tracks borrows, and applies interest. Each asset has its own vault instance.

Responsibilities

• Custody the underlying asset for one market.

• Mint and burn pTokens for suppliers.

• Track borrow balances and interest accrual.

• Enforce caps, reserve factor, and admin fee.

• Delegate risk checks to SimplePeridottroller.

Key Functions

• deposit(user, amount) Transfers underlying from user, mints pTokens.

• withdraw(user, ptoken_amount) Burns pTokens and returns underlying; checks liquidity via controller.

• borrow(user, amount) Borrows underlying if controller allows.

• repay(user, amount) Repays user debt (use a large amount for "max repay").

• get_exchange_rate() Returns pToken → underlying exchange rate (scaled 1e6).

• get_user_borrow_balance(user) Current borrow balance including accrued interest.

Events

• Deposit

• Withdraw

• Borrow

• Repay

• FlashLoan