Demo pool contract

Source: contracts/demo-pool/src/lib.rs. Interface version 0.

TESTNET DEMO ONLY

“TESTNET DEMO ONLY. Not a lending product: no interest, no liquidation, fixed 1:1 prices. Never deploy to mainnet.” This text is in the contract itself: notice() returns it.

The pool takes one collateral token and lends one debt token. Before every borrow it asks the guard about the collateral. When the guard says unhealthy, nothing moves: the pool emits borrow_rejected with the guard’s reason and returns it.

Functions

Function	Auth	Does
__constructor(admin, guard, collateral, debt, policy: Policy, ltv_bps: u32)	at deploy	Configures the pool. Error InvalidConfig if ltv_bps is 0 or above 10,000
version() -> u32	none	0
notice() -> String	none	The testnet-only notice above
config() -> Config	none	The configuration
position(user) -> Position	none	{ collateral, debt } for a user
deposit(user, amount: i128)	user	Moves collateral from the user into the pool. Error InvalidAmount if amount ≤ 0
borrow(user, amount: i128) -> BorrowResult	user	Asks the guard, then lends. Errors InvalidAmount, OverLimit

borrow:

1. calls guard.is_healthy(collateral, policy);
2. if unhealthy: emits borrow_rejected, moves nothing, returns Rejected(reason);
3. otherwise checks debt + amount ≤ collateral × ltv_bps ÷ 10,000 (else OverLimit), transfers the debt token, emits borrowed, returns Borrowed.

Types

pub struct Config { pub admin: Address, pub guard: Address, pub collateral: Address,
                    pub debt: Address, pub policy: Policy, pub ltv_bps: u32 }
pub struct Position { pub collateral: i128, pub debt: i128 }
pub enum BorrowResult { Borrowed, Rejected(Reason) }

Policy and Reason mirror the guard’s.

Events

All topics start with testnet_demo:

Topics	Data
testnet_demo, deposited, user	amount
testnet_demo, borrowed, user	amount
testnet_demo, borrow_rejected, user	amount, reason

Errors

Error	Code
InvalidAmount	1
OverLimit	2
InvalidConfig	3