2022-02-16 09:50:00 +00:00
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// SPDX-License-Identifier: MIT
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2022-09-29 10:18:02 +00:00
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pragma solidity ^0.8.8;
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2022-02-16 09:50:00 +00:00
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import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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2022-09-23 02:33:39 +00:00
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import "@openzeppelin/contracts/utils/math/Math.sol";
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2022-10-25 02:06:52 +00:00
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import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
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2023-01-09 12:56:29 +00:00
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import "./Requests.sol";
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2022-02-16 13:38:19 +00:00
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import "./Collateral.sol";
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2022-06-13 08:40:18 +00:00
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import "./Proofs.sol";
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2023-01-10 14:04:16 +00:00
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import "./StateRetrieval.sol";
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2022-02-16 09:50:00 +00:00
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2023-01-10 14:04:16 +00:00
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contract Marketplace is Collateral, Proofs, StateRetrieval {
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2022-10-25 02:06:52 +00:00
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using EnumerableSet for EnumerableSet.Bytes32Set;
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2023-01-10 14:04:16 +00:00
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using Requests for Request;
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2022-10-25 02:06:52 +00:00
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2022-02-16 13:38:19 +00:00
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uint256 public immutable collateral;
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2023-01-09 14:52:27 +00:00
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uint256 public immutable minCollateralThreshold;
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uint256 public immutable slashMisses;
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uint256 public immutable slashPercentage;
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2022-02-16 13:15:43 +00:00
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MarketplaceFunds private funds;
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2022-09-29 10:18:02 +00:00
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mapping(RequestId => Request) private requests;
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mapping(RequestId => RequestContext) private requestContexts;
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mapping(SlotId => Slot) private slots;
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2022-02-16 09:50:00 +00:00
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2022-06-13 08:40:18 +00:00
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constructor(
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IERC20 _token,
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uint256 _collateral,
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2023-01-09 14:52:27 +00:00
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uint256 _minCollateralThreshold,
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uint256 _slashMisses,
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uint256 _slashPercentage,
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2022-06-13 08:40:18 +00:00
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uint256 _proofPeriod,
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uint256 _proofTimeout,
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uint8 _proofDowntime
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)
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2022-02-16 13:38:19 +00:00
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Collateral(_token)
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2022-06-13 08:40:18 +00:00
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Proofs(_proofPeriod, _proofTimeout, _proofDowntime)
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2022-02-16 13:38:19 +00:00
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marketplaceInvariant
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{
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collateral = _collateral;
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2023-01-09 14:52:27 +00:00
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minCollateralThreshold = _minCollateralThreshold;
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slashMisses = _slashMisses;
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slashPercentage = _slashPercentage;
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}
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2022-11-23 15:07:01 +00:00
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function isWithdrawAllowed() internal view override returns (bool) {
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2023-01-10 14:04:16 +00:00
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return !hasSlots(msg.sender);
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2022-11-23 15:07:01 +00:00
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}
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2023-01-10 10:04:04 +00:00
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function requestStorage(
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Request calldata request
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) public marketplaceInvariant {
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2022-02-17 10:00:18 +00:00
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require(request.client == msg.sender, "Invalid client address");
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2022-02-21 11:55:00 +00:00
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2023-01-10 14:04:16 +00:00
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RequestId id = request.id();
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2022-02-17 10:09:35 +00:00
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require(requests[id].client == address(0), "Request already exists");
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2022-02-21 11:55:00 +00:00
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2022-02-16 09:50:00 +00:00
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requests[id] = request;
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2022-09-29 10:07:55 +00:00
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RequestContext storage context = _context(id);
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// set contract end time to `duration` from now (time request was created)
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context.endsAt = block.timestamp + request.ask.duration;
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2023-01-10 14:04:16 +00:00
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addToMyRequests(request.client, id);
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2022-02-21 11:55:00 +00:00
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2022-07-20 09:07:20 +00:00
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uint256 amount = price(request);
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funds.received += amount;
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funds.balance += amount;
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transferFrom(msg.sender, amount);
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2022-02-21 11:55:00 +00:00
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2022-04-06 12:26:56 +00:00
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emit StorageRequested(id, request.ask);
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2022-02-16 09:50:00 +00:00
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}
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2022-07-19 09:33:54 +00:00
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function fillSlot(
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RequestId requestId,
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uint256 slotIndex,
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bytes calldata proof
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2022-09-21 09:13:12 +00:00
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) public requestMustAcceptProofs(requestId) marketplaceInvariant {
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Request storage request = _request(requestId);
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require(slotIndex < request.ask.slots, "Invalid slot");
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2023-01-11 09:52:08 +00:00
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SlotId slotId = Requests.slotId(requestId, slotIndex);
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Slot storage slot = slots[slotId];
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require(slot.host == address(0), "Slot already filled");
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require(balanceOf(msg.sender) >= collateral, "Insufficient collateral");
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2023-01-10 11:51:26 +00:00
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_startRequiringProofs(slotId, request.ask.proofProbability);
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2023-01-09 14:19:00 +00:00
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submitProof(slotId, proof);
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slot.host = msg.sender;
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slot.requestId = requestId;
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2022-09-21 09:57:26 +00:00
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RequestContext storage context = _context(requestId);
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2022-08-03 09:54:29 +00:00
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context.slotsFilled += 1;
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2022-11-23 11:25:47 +00:00
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2023-01-10 14:04:16 +00:00
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addToMySlots(slot.host, slotId);
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2022-11-23 11:25:47 +00:00
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2022-07-19 09:33:54 +00:00
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emit SlotFilled(requestId, slotIndex, slotId);
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2022-08-03 09:54:29 +00:00
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if (context.slotsFilled == request.ask.slots) {
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context.state = RequestState.Started;
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2022-09-21 09:38:42 +00:00
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context.startedAt = block.timestamp;
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2022-07-20 08:29:24 +00:00
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emit RequestFulfilled(requestId);
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}
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2022-07-19 09:33:54 +00:00
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}
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2022-11-23 14:29:58 +00:00
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function freeSlot(SlotId slotId) public {
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Slot storage slot = _slot(slotId);
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require(slot.host == msg.sender, "Slot filled by other host");
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RequestState s = state(slot.requestId);
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if (s == RequestState.Finished || s == RequestState.Cancelled) {
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payoutSlot(slot.requestId, slotId);
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} else if (s == RequestState.Failed) {
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removeFromMySlots(msg.sender, slotId);
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2022-11-23 14:29:58 +00:00
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} else {
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_forciblyFreeSlot(slotId);
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}
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}
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2023-01-10 10:04:04 +00:00
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function markProofAsMissing(
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SlotId slotId,
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Period period
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) public slotMustAcceptProofs(slotId) {
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_markProofAsMissing(slotId, period);
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address host = getHost(slotId);
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2023-01-09 14:52:27 +00:00
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if (missingProofs(slotId) % slashMisses == 0) {
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_slash(host, slashPercentage);
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if (balanceOf(host) < minCollateralThreshold) {
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// When the collateral drops below the minimum threshold, the slot
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// needs to be freed so that there is enough remaining collateral to be
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// distributed for repairs and rewards (with any leftover to be burnt).
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_forciblyFreeSlot(slotId);
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}
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}
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}
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2023-01-10 10:04:04 +00:00
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function _forciblyFreeSlot(
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SlotId slotId
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)
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internal
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slotMustAcceptProofs(slotId)
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marketplaceInvariant
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// TODO: restrict senders that can call this function
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{
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Slot storage slot = _slot(slotId);
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RequestId requestId = slot.requestId;
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RequestContext storage context = requestContexts[requestId];
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// TODO: burn host's slot collateral except for repair costs + mark proof
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// missing reward
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// Slot collateral is not yet implemented as the design decision was
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// not finalised.
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2023-01-10 11:51:26 +00:00
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_stopRequiringProofs(slotId);
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2023-01-10 14:04:16 +00:00
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removeFromMySlots(slot.host, slotId);
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2022-11-23 11:25:47 +00:00
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2022-09-16 05:00:54 +00:00
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slot.host = address(0);
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2022-09-29 10:18:02 +00:00
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slot.requestId = RequestId.wrap(0);
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context.slotsFilled -= 1;
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emit SlotFreed(requestId, slotId);
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2022-09-21 09:13:12 +00:00
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Request storage request = _request(requestId);
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2022-09-16 05:00:54 +00:00
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uint256 slotsLost = request.ask.slots - context.slotsFilled;
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2022-10-26 08:58:14 +00:00
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if (
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slotsLost > request.ask.maxSlotLoss &&
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context.state == RequestState.Started
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) {
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2022-09-16 05:00:54 +00:00
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context.state = RequestState.Failed;
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2022-09-23 02:33:39 +00:00
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context.endsAt = block.timestamp - 1;
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2022-09-16 05:00:54 +00:00
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emit RequestFailed(requestId);
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// TODO: burn all remaining slot collateral (note: slot collateral not
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// yet implemented)
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// TODO: send client remaining funds
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}
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}
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2022-10-25 02:04:16 +00:00
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2023-01-10 10:04:04 +00:00
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function payoutSlot(
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RequestId requestId,
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SlotId slotId
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) private marketplaceInvariant {
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RequestState requestState = state(requestId);
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require(
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requestState == RequestState.Finished ||
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requestState == RequestState.Cancelled,
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2022-11-23 15:07:01 +00:00
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"Contract not ended"
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);
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2022-09-21 09:57:26 +00:00
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RequestContext storage context = _context(requestId);
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2022-10-25 02:06:52 +00:00
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Request storage request = _request(requestId);
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2022-09-21 09:57:26 +00:00
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context.state = RequestState.Finished;
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2023-01-10 14:04:16 +00:00
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removeFromMyRequests(request.client, requestId);
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2022-09-21 09:38:42 +00:00
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Slot storage slot = _slot(slotId);
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2022-07-19 15:09:35 +00:00
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require(!slot.hostPaid, "Already paid");
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2022-11-23 11:25:47 +00:00
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2023-01-10 14:04:16 +00:00
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removeFromMySlots(slot.host, slotId);
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2022-11-23 11:25:47 +00:00
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2022-07-20 09:07:20 +00:00
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uint256 amount = pricePerSlot(requests[requestId]);
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2022-07-19 15:09:35 +00:00
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funds.sent += amount;
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funds.balance -= amount;
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slot.hostPaid = true;
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require(token.transfer(slot.host, amount), "Payment failed");
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}
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2022-08-17 05:26:04 +00:00
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/// @notice Withdraws storage request funds back to the client that deposited them.
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/// @dev Request must be expired, must be in RequestState.New, and the transaction must originate from the depositer address.
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/// @param requestId the id of the request
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function withdrawFunds(RequestId requestId) public marketplaceInvariant {
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2022-09-07 05:25:01 +00:00
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Request storage request = requests[requestId];
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2022-08-04 02:14:36 +00:00
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require(block.timestamp > request.expiry, "Request not yet timed out");
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require(request.client == msg.sender, "Invalid client address");
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2022-09-21 09:57:26 +00:00
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RequestContext storage context = _context(requestId);
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2022-08-04 02:14:36 +00:00
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require(context.state == RequestState.New, "Invalid state");
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// Update request state to Cancelled. Handle in the withdraw transaction
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// as there needs to be someone to pay for the gas to update the state
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context.state = RequestState.Cancelled;
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2023-01-10 14:04:16 +00:00
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removeFromMyRequests(request.client, requestId);
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2022-11-23 11:25:47 +00:00
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2022-08-04 02:14:36 +00:00
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emit RequestCancelled(requestId);
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2022-09-07 05:25:01 +00:00
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// TODO: To be changed once we start paying out hosts for the time they
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// fill a slot. The amount that we paid to hosts will then have to be
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// deducted from the price.
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uint256 amount = _price(request);
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funds.sent += amount;
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funds.balance -= amount;
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require(token.transfer(msg.sender, amount), "Withdraw failed");
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2022-08-04 02:14:36 +00:00
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}
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2022-08-22 06:16:45 +00:00
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/// @notice Return id of request that slot belongs to
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/// @dev Returns requestId that is mapped to the slotId
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/// @param slotId id of the slot
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/// @return if of the request the slot belongs to
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2023-01-10 10:04:04 +00:00
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function _getRequestIdForSlot(
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SlotId slotId
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) internal view returns (RequestId) {
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2022-08-22 06:16:45 +00:00
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Slot memory slot = _slot(slotId);
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2023-01-16 13:21:20 +00:00
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require(RequestId.unwrap(slot.requestId) != 0, "Missing request id");
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2022-08-22 06:16:45 +00:00
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return slot.requestId;
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}
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2023-01-09 12:38:12 +00:00
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function getHost(SlotId slotId) public view returns (address) {
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2023-01-10 10:33:18 +00:00
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return slots[slotId].host;
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2023-01-09 12:38:12 +00:00
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}
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2023-01-10 10:04:04 +00:00
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function _request(
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RequestId requestId
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) internal view returns (Request storage) {
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2022-09-21 09:57:26 +00:00
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Request storage request = requests[requestId];
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2022-09-13 07:14:57 +00:00
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require(request.client != address(0), "Unknown request");
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2022-09-13 07:13:11 +00:00
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return request;
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2022-02-22 08:25:42 +00:00
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}
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2023-01-10 10:04:04 +00:00
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function getRequest(
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RequestId requestId
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) public view returns (Request memory) {
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2023-01-09 12:38:12 +00:00
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return _request(requestId);
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}
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2022-09-29 10:18:02 +00:00
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function _slot(SlotId slotId) internal view returns (Slot storage) {
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2022-09-13 07:14:57 +00:00
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Slot storage slot = slots[slotId];
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2022-08-22 06:16:45 +00:00
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require(slot.host != address(0), "Slot empty");
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return slot;
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}
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2023-01-10 10:04:04 +00:00
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function _context(
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RequestId requestId
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) internal view returns (RequestContext storage) {
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2022-09-08 07:56:01 +00:00
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return requestContexts[requestId];
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}
|
|
|
|
|
2022-06-13 09:49:25 +00:00
|
|
|
function proofPeriod() public view returns (uint256) {
|
2023-01-10 13:16:32 +00:00
|
|
|
return secondsPerPeriod;
|
2022-06-13 09:49:25 +00:00
|
|
|
}
|
|
|
|
|
2023-01-10 11:11:20 +00:00
|
|
|
function proofEnd(SlotId slotId) public view override returns (uint256) {
|
2022-10-26 08:48:09 +00:00
|
|
|
return requestEnd(_slot(slotId).requestId);
|
2022-06-13 09:49:25 +00:00
|
|
|
}
|
|
|
|
|
2022-10-25 12:49:37 +00:00
|
|
|
function requestEnd(RequestId requestId) public view returns (uint256) {
|
2023-01-10 11:11:20 +00:00
|
|
|
uint256 end = _context(requestId).endsAt;
|
2022-10-26 08:58:14 +00:00
|
|
|
if (_requestAcceptsProofs(requestId)) {
|
2022-10-26 02:15:42 +00:00
|
|
|
return end;
|
|
|
|
} else {
|
|
|
|
return Math.min(end, block.timestamp - 1);
|
|
|
|
}
|
2022-10-25 12:49:37 +00:00
|
|
|
}
|
|
|
|
|
2023-01-09 14:15:11 +00:00
|
|
|
function isProofRequired(SlotId slotId) public view returns (bool) {
|
|
|
|
if (!_slotAcceptsProofs(slotId)) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return _isProofRequired(slotId);
|
|
|
|
}
|
|
|
|
|
|
|
|
function willProofBeRequired(SlotId slotId) public view returns (bool) {
|
|
|
|
if (!_slotAcceptsProofs(slotId)) {
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
return _willProofBeRequired(slotId);
|
|
|
|
}
|
|
|
|
|
|
|
|
function getChallenge(SlotId slotId) public view returns (bytes32) {
|
|
|
|
if (!_slotAcceptsProofs(slotId)) {
|
|
|
|
return bytes32(0);
|
|
|
|
}
|
|
|
|
return _getChallenge(slotId);
|
|
|
|
}
|
|
|
|
|
|
|
|
function getPointer(SlotId slotId) public view returns (uint8) {
|
|
|
|
return _getPointer(slotId);
|
|
|
|
}
|
|
|
|
|
2022-08-04 02:14:36 +00:00
|
|
|
function _price(
|
|
|
|
uint64 numSlots,
|
|
|
|
uint256 duration,
|
2022-10-25 02:04:16 +00:00
|
|
|
uint256 reward
|
|
|
|
) internal pure returns (uint256) {
|
2022-08-04 02:14:36 +00:00
|
|
|
return numSlots * duration * reward;
|
|
|
|
}
|
|
|
|
|
|
|
|
function _price(Request memory request) internal pure returns (uint256) {
|
|
|
|
return _price(request.ask.slots, request.ask.duration, request.ask.reward);
|
|
|
|
}
|
|
|
|
|
2022-07-20 09:07:20 +00:00
|
|
|
function price(Request calldata request) private pure returns (uint256) {
|
2022-08-04 02:14:36 +00:00
|
|
|
return _price(request.ask.slots, request.ask.duration, request.ask.reward);
|
2022-07-20 09:07:20 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
function pricePerSlot(Request memory request) private pure returns (uint256) {
|
|
|
|
return request.ask.duration * request.ask.reward;
|
|
|
|
}
|
|
|
|
|
2022-09-29 10:18:02 +00:00
|
|
|
function state(RequestId requestId) public view returns (RequestState) {
|
2023-01-16 13:14:15 +00:00
|
|
|
RequestContext storage context = _context(requestId);
|
|
|
|
if (
|
|
|
|
context.state == RequestState.New &&
|
|
|
|
block.timestamp > _request(requestId).expiry
|
|
|
|
) {
|
2022-09-08 07:56:01 +00:00
|
|
|
return RequestState.Cancelled;
|
2023-01-16 13:14:15 +00:00
|
|
|
} else if (
|
|
|
|
context.state == RequestState.Started && block.timestamp > context.endsAt
|
|
|
|
) {
|
2022-09-21 09:57:26 +00:00
|
|
|
return RequestState.Finished;
|
2022-09-08 07:56:01 +00:00
|
|
|
} else {
|
|
|
|
return context.state;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-09-29 10:18:02 +00:00
|
|
|
/// @notice returns true when the request is accepting proof submissions from hosts occupying slots.
|
|
|
|
/// @dev Request state must be new or started, and must not be cancelled, finished, or failed.
|
|
|
|
/// @param slotId id of the slot, that is mapped to a request, for which to obtain state info
|
|
|
|
function _slotAcceptsProofs(SlotId slotId) internal view returns (bool) {
|
|
|
|
RequestId requestId = _getRequestIdForSlot(slotId);
|
|
|
|
return _requestAcceptsProofs(requestId);
|
|
|
|
}
|
|
|
|
|
2022-09-08 07:56:01 +00:00
|
|
|
/// @notice returns true when the request is accepting proof submissions from hosts occupying slots.
|
|
|
|
/// @dev Request state must be new or started, and must not be cancelled, finished, or failed.
|
|
|
|
/// @param requestId id of the request for which to obtain state info
|
2023-01-10 10:04:04 +00:00
|
|
|
function _requestAcceptsProofs(
|
|
|
|
RequestId requestId
|
|
|
|
) internal view returns (bool) {
|
2022-09-08 07:56:01 +00:00
|
|
|
RequestState s = state(requestId);
|
|
|
|
return s == RequestState.New || s == RequestState.Started;
|
|
|
|
}
|
|
|
|
|
2022-08-03 09:54:29 +00:00
|
|
|
struct RequestContext {
|
2022-07-20 08:29:24 +00:00
|
|
|
uint256 slotsFilled;
|
2022-08-03 09:54:29 +00:00
|
|
|
RequestState state;
|
2022-09-21 09:38:42 +00:00
|
|
|
uint256 startedAt;
|
2022-09-21 09:57:26 +00:00
|
|
|
uint256 endsAt;
|
2022-07-20 08:29:24 +00:00
|
|
|
}
|
|
|
|
|
2022-07-19 09:33:54 +00:00
|
|
|
struct Slot {
|
|
|
|
address host;
|
2022-07-19 15:09:35 +00:00
|
|
|
bool hostPaid;
|
2022-09-29 10:18:02 +00:00
|
|
|
RequestId requestId;
|
2022-07-19 09:33:54 +00:00
|
|
|
}
|
|
|
|
|
2022-09-29 10:18:02 +00:00
|
|
|
event StorageRequested(RequestId requestId, Ask ask);
|
|
|
|
event RequestFulfilled(RequestId indexed requestId);
|
|
|
|
event RequestFailed(RequestId indexed requestId);
|
2022-07-19 09:33:54 +00:00
|
|
|
event SlotFilled(
|
2022-09-29 10:18:02 +00:00
|
|
|
RequestId indexed requestId,
|
2022-07-19 09:33:54 +00:00
|
|
|
uint256 indexed slotIndex,
|
2022-09-29 10:18:02 +00:00
|
|
|
SlotId slotId
|
2022-07-19 09:33:54 +00:00
|
|
|
);
|
2022-09-29 10:18:02 +00:00
|
|
|
event SlotFreed(RequestId indexed requestId, SlotId slotId);
|
|
|
|
event RequestCancelled(RequestId indexed requestId);
|
2022-02-16 09:50:00 +00:00
|
|
|
|
2022-02-16 13:15:43 +00:00
|
|
|
modifier marketplaceInvariant() {
|
|
|
|
MarketplaceFunds memory oldFunds = funds;
|
2022-02-16 09:50:00 +00:00
|
|
|
_;
|
2022-02-16 13:15:43 +00:00
|
|
|
assert(funds.received >= oldFunds.received);
|
|
|
|
assert(funds.sent >= oldFunds.sent);
|
|
|
|
assert(funds.received == funds.balance + funds.sent);
|
2022-02-16 09:50:00 +00:00
|
|
|
}
|
|
|
|
|
2022-09-08 07:56:01 +00:00
|
|
|
/// @notice Modifier that requires the request state to be that which is accepting proof submissions from hosts occupying slots.
|
|
|
|
/// @dev Request state must be new or started, and must not be cancelled, finished, or failed.
|
|
|
|
/// @param slotId id of the slot, that is mapped to a request, for which to obtain state info
|
2022-09-29 10:18:02 +00:00
|
|
|
modifier slotMustAcceptProofs(SlotId slotId) {
|
|
|
|
RequestId requestId = _getRequestIdForSlot(slotId);
|
2022-09-08 07:56:01 +00:00
|
|
|
require(_requestAcceptsProofs(requestId), "Slot not accepting proofs");
|
|
|
|
_;
|
|
|
|
}
|
|
|
|
|
2022-09-21 09:13:12 +00:00
|
|
|
/// @notice Modifier that requires the request state to be that which is accepting proof submissions from hosts occupying slots.
|
|
|
|
/// @dev Request state must be new or started, and must not be cancelled, finished, or failed.
|
|
|
|
/// @param requestId id of the request, for which to obtain state info
|
2022-09-29 10:18:02 +00:00
|
|
|
modifier requestMustAcceptProofs(RequestId requestId) {
|
2022-09-21 09:13:12 +00:00
|
|
|
require(_requestAcceptsProofs(requestId), "Request not accepting proofs");
|
|
|
|
_;
|
|
|
|
}
|
|
|
|
|
2022-02-16 13:15:43 +00:00
|
|
|
struct MarketplaceFunds {
|
2022-02-16 09:50:00 +00:00
|
|
|
uint256 balance;
|
|
|
|
uint256 received;
|
|
|
|
uint256 sent;
|
|
|
|
}
|
|
|
|
}
|