NFT Loan Pool

NftLoanPool is a pooled NFT lending market: lenders deposit ETH and earn interest pro-rata; borrowers lock whitelisted NFTs as collateral and borrow against a collection floor price.

Parameters (admin-tunable, all defaults live)

Parameter	Default	Meaning
`ltvBps`	4000 (40%)	Borrow up to 40% of the admin-set collection floor
`aprBps`	2000 (20%)	APR, linear, accrued per second
`protocolFeeBps`	1000 (10%)	Share of interest → DarkMatterTreasury
`loanTerm`	90 days	Fixed borrow term

Lender side

Deposits mint shares; interest accrues through a cumulative per-share track (the FounderPass pattern — lenders never claim interest earned before they existed):

accumPerShare += interest * 1e18 / totalShares;   // per interest event
claimable = (accumPerShare − claimedPerShare[lender]) / 1e18;

withdraw(shares) pays principal + accrued interest together — the liquidity check excludes the caller’s own interest so a lender can never be unable to withdraw principal + interest in one call.
claimInterest() pays just the interest.
90% of all interest goes to lenders pro-rata; 10% is the treasury fee.

Borrower side

borrow(collection, tokenId):
    principal = floorPriceOf[collection] × ltvBps / 10000     // 40% of floor
    dueAt     = now + 90 days
    NFT moves into the pool via transferFrom

debt at time t = principal + (principal × aprBps × elapsed) / (10000 × 31_536_000)
                 // interest FROZEN at dueAt — no snowballing

Action	Effect
Repay	Pay principal + accrued interest → NFT returns to you
Liquidate (permissionless, after due)	Repay the debt → NFT goes to the liquidator

Liquidation is permissionless and incentive-aligned: the liquidator pays the debt and receives the NFT, so overdue loans clear without any bot infrastructure.

Worked example

A collection has a 1 ETH admin-set floor. Borrower locks one NFT:

Step	Math	Value
Borrow	1 ETH × 40%	0.40 ETH received
Debt after exactly 90 days	0.40 × (1 + 0.20 × 90/365)	≈ 0.4197 ETH
Interest	0.4197 − 0.40	≈ 0.0197 ETH
Treasury fee	10% of interest	≈ 0.0020 ETH
Lenders receive	90% pro-rata by shares	≈ 0.0177 ETH

Borrower repays 0.4197 ETH → NFT returns. If they don’t, anyone liquidates by paying 0.4197 ETH and takes the NFT.

Pool solvency — no receive() on purpose

The pool has no receive() and only deposit() / liquidate() bring ETH in. This guarantees a simple invariant: every wei of unclaimed lender interest is covered by real pool balance, and withdrawals re-check:

// withdraw(): remaining unclaimed interest must stay covered after payout
require(address(this).balance − amount ≥ totalUnclaimedInterest − interest);

Safety model

Concern	Answer
Floor price manipulation	Floors are admin-set per collection, not oracle-fed from AMMs
Interest snowball past due	Frozen at `dueAt` by design
Share dilution of old lenders	Checkpoint at deposit — no lender earns interest from before their deposit
Fee skimming	Treasury fee only ever takes 10% of interest, never principal
Admin rug	Parameters are tunable but principal/interest accounting is not; two-step admin handover

Next: Fee Matrix.

Overview

Payment Structures

Casino Economy

Earn & Lending

Monetization

Reference

Nft Loans

NFT Loan Pool

Parameters (admin-tunable, all defaults live)

Lender side

Borrower side

Worked example

Pool solvency — no receive() on purpose

Safety model

​NFT Loan Pool

​Parameters (admin-tunable, all defaults live)

​Lender side

​Borrower side

​Worked example

​Pool solvency — no receive() on purpose

​Safety model

NFT Loan Pool

Parameters (admin-tunable, all defaults live)

Lender side

Borrower side

Worked example

Pool solvency — no receive() on purpose

Safety model