feat: expiry specified as duration (#99)
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@ -32,6 +32,7 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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uint256 expiryFundsWithdraw;
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uint256 startedAt;
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uint256 endsAt;
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uint256 expiresAt;
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}
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struct Slot {
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@ -90,11 +91,14 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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RequestId id = request.id();
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require(_requests[id].client == address(0), "Request already exists");
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require(
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request.expiry > 0 && request.expiry < request.ask.duration,
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"Expiry not in range"
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);
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_requests[id] = request;
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uint256 endsAt = block.timestamp + request.ask.duration;
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require(endsAt > request.expiry, "Request end before expiry");
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_requestContexts[id].endsAt = endsAt;
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_requestContexts[id].endsAt = block.timestamp + request.ask.duration;
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_requestContexts[id].expiresAt = block.timestamp + request.expiry;
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_addToMyRequests(request.client, id);
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@ -103,7 +107,7 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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_marketplaceTotals.received += amount;
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_transferFrom(msg.sender, amount);
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emit StorageRequested(id, request.ask, request.expiry);
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emit StorageRequested(id, request.ask, _requestContexts[id].expiresAt);
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}
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function fillSlot(
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@ -206,6 +210,8 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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Slot storage slot = _slots[slotId];
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Request storage request = _requests[slot.requestId];
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// TODO: Reward for validator that calls this function
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if (missingProofs(slotId) % _config.collateral.slashCriterion == 0) {
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uint256 slashedAmount = (request.ask.collateral *
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_config.collateral.slashPercentage) / 100;
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@ -286,7 +292,10 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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/// @param requestId the id of the request
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function withdrawFunds(RequestId requestId) public {
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Request storage request = _requests[requestId];
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require(block.timestamp > request.expiry, "Request not yet timed out");
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require(
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block.timestamp > requestExpiry(requestId),
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"Request not yet timed out"
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);
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require(request.client == msg.sender, "Invalid client address");
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RequestContext storage context = _requestContexts[requestId];
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require(context.state == RequestState.New, "Invalid state");
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@ -339,15 +348,22 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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}
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}
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function requestExpiry(RequestId requestId) public view returns (uint256) {
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return _requestContexts[requestId].expiresAt;
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}
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/// @notice Calculates the amount that should be payed out to a host if a request expires based on when the host fills the slot
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function _expiryPayoutAmount(
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RequestId requestId,
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uint256 startingTimestamp
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) private view returns (uint256) {
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Request storage request = _requests[requestId];
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require(startingTimestamp < request.expiry, "Start not before expiry");
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require(
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startingTimestamp < requestExpiry(requestId),
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"Start not before expiry"
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);
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return (request.expiry - startingTimestamp) * request.ask.reward;
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return (requestExpiry(requestId) - startingTimestamp) * request.ask.reward;
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}
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function getHost(SlotId slotId) public view returns (address) {
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@ -360,7 +376,7 @@ contract Marketplace is Proofs, StateRetrieval, Endian {
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RequestContext storage context = _requestContexts[requestId];
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if (
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context.state == RequestState.New &&
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block.timestamp > _requests[requestId].expiry
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block.timestamp > requestExpiry(requestId)
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) {
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return RequestState.Cancelled;
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} else if (
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@ -8,7 +8,7 @@ struct Request {
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address client;
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Ask ask;
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Content content;
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uint256 expiry; // timestamp as seconds since unix epoch at which this request expires
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uint256 expiry; // amount of seconds since start of the request at which this request expires
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bytes32 nonce; // random nonce to differentiate between similar requests
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}
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@ -140,9 +140,12 @@ describe("Marketplace", function () {
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it("emits event when storage is requested", async function () {
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await token.approve(marketplace.address, price(request))
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// We +1 second to the expiry because the time will advance with the mined transaction for requestStorage because of Hardhat
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const expectedExpiry = (await currentTime()) + request.expiry + 1
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await expect(marketplace.requestStorage(request))
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.to.emit(marketplace, "StorageRequested")
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.withArgs(requestId(request), askToArray(request.ask), request.expiry)
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.withArgs(requestId(request), askToArray(request.ask), expectedExpiry)
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})
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it("allows retrieval of request details", async function () {
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@ -168,11 +171,17 @@ describe("Marketplace", function () {
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)
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})
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it("rejects request when expiry is after request end", async function () {
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request.expiry = (await currentTime()) + request.ask.duration + hours(1)
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it("rejects request when expiry out of bounds", async function () {
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await token.approve(marketplace.address, price(request))
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request.expiry = request.ask.duration + 1
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await expect(marketplace.requestStorage(request)).to.be.revertedWith(
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"Request end before expiry"
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"Expiry not in range"
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)
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request.expiry = 0
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await expect(marketplace.requestStorage(request)).to.be.revertedWith(
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"Expiry not in range"
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)
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})
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@ -241,9 +250,10 @@ describe("Marketplace", function () {
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it("is rejected when request is cancelled", async function () {
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switchAccount(client)
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let expired = { ...request, expiry: (await currentTime()) - hours(1) }
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let expired = { ...request, expiry: hours(1) + 1 }
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await token.approve(marketplace.address, price(request))
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await marketplace.requestStorage(expired)
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await waitUntilCancelled(expired)
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switchAccount(host)
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await expect(
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marketplace.fillSlot(requestId(expired), slot.index, proof)
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@ -465,20 +475,19 @@ describe("Marketplace", function () {
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})
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it("pays the host when contract was cancelled", async function () {
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// Lets move the time into middle of the expiry window
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const fillTimestamp =
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(await currentTime()) +
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Math.floor((request.expiry - (await currentTime())) / 2) -
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1
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await advanceTimeToForNextBlock(fillTimestamp)
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// Lets advance the time more into the expiry window
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const filledAt = (await currentTime()) + Math.floor(request.expiry / 3)
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const expiresAt = (
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await marketplace.requestExpiry(requestId(request))
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).toNumber()
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await advanceTimeToForNextBlock(filledAt)
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await marketplace.fillSlot(slot.request, slot.index, proof)
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await waitUntilCancelled(request)
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await marketplace.freeSlot(slotId(slot))
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const expectedPartialPayout = (expiresAt - filledAt) * request.ask.reward
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const endBalance = await token.balanceOf(host.address)
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const expectedPartialPayout =
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(request.expiry - fillTimestamp) * request.ask.reward
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expect(endBalance - ACCOUNT_STARTING_BALANCE).to.be.equal(
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expectedPartialPayout
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)
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@ -617,14 +626,17 @@ describe("Marketplace", function () {
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})
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it("withdraws to the client for cancelled requests lowered by hosts payout", async function () {
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const fillTimestamp =
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(await currentTime()) +
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Math.floor((request.expiry - (await currentTime())) / 2)
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await advanceTimeToForNextBlock(fillTimestamp)
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// Lets advance the time more into the expiry window
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const filledAt = (await currentTime()) + Math.floor(request.expiry / 3)
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const expiresAt = (
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await marketplace.requestExpiry(requestId(request))
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).toNumber()
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await advanceTimeToForNextBlock(filledAt)
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await marketplace.fillSlot(slot.request, slot.index, proof)
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await waitUntilCancelled(request)
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const expectedPartialHostPayout =
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(request.expiry - fillTimestamp) * request.ask.reward
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(expiresAt - filledAt) * request.ask.reward
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switchAccount(client)
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await marketplace.withdrawFunds(slot.request)
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@ -1,6 +1,5 @@
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const { ethers } = require("hardhat")
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const { hours } = require("./time")
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const { currentTime } = require("./evm")
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const { hexlify, randomBytes } = ethers.utils
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const exampleConfiguration = () => ({
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@ -19,7 +18,6 @@ const exampleConfiguration = () => ({
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})
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const exampleRequest = async () => {
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const now = await currentTime()
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return {
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client: hexlify(randomBytes(20)),
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ask: {
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@ -35,7 +33,7 @@ const exampleRequest = async () => {
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cid: "zb2rhheVmk3bLks5MgzTqyznLu1zqGH5jrfTA1eAZXrjx7Vob",
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merkleRoot: Array.from(randomBytes(32)),
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},
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expiry: now + hours(1),
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expiry: hours(1),
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nonce: hexlify(randomBytes(32)),
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}
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}
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@ -2,8 +2,16 @@ const { advanceTimeToForNextBlock, currentTime } = require("./evm")
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const { slotId, requestId } = require("./ids")
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const { price } = require("./price")
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/**
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* @dev This will not advance the time right on the "expiry threshold" but will most probably "overshoot it"
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* because "currentTime" most probably is not the time at which the request is created, but it is used
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* in the next timestamp calculation with `now + expiry`.
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* @param request
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* @returns {Promise<void>}
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*/
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async function waitUntilCancelled(request) {
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await advanceTimeToForNextBlock(request.expiry + 1)
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// We do +1, because the expiry check in contract is done as `>` and not `>=`.
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await advanceTimeToForNextBlock((await currentTime()) + request.expiry + 1)
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}
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async function waitUntilStarted(contract, request, proof, token) {
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@ -16,6 +24,7 @@ async function waitUntilStarted(contract, request, proof, token) {
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async function waitUntilFinished(contract, requestId) {
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const end = (await contract.requestEnd(requestId)).toNumber()
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// We do +1, because the end check in contract is done as `>` and not `>=`.
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await advanceTimeToForNextBlock(end + 1)
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}
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@ -1,4 +1,5 @@
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const { Assertion } = require("chai")
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const { currentTime } = require("./evm")
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const RequestState = {
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New: 0,
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@ -46,4 +47,8 @@ const enableRequestAssertions = function () {
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})
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}
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module.exports = { RequestState, SlotState, enableRequestAssertions }
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module.exports = {
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RequestState,
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SlotState,
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enableRequestAssertions,
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}
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