nim-codex/tests/codex/testpurchasing.nim

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import std/times
import pkg/asynctest
import pkg/chronos
import pkg/stint
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import pkg/codex/purchasing
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import ./helpers/mockmarket
import ./helpers/mockclock
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import ./examples
suite "Purchasing":
var purchasing: Purchasing
var market: MockMarket
var clock: MockClock
var request: StorageRequest
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setup:
market = MockMarket.new()
clock = MockClock.new()
purchasing = Purchasing.new(market, clock)
request = StorageRequest(
ask: StorageAsk(
duration: uint16.example.u256,
size: uint32.example.u256,
)
)
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proc purchaseAndWait(request: StorageRequest) {.async.} =
let purchase = purchasing.purchase(request)
clock.set(market.requested[^1].expiry.truncate(int64))
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await purchase.wait()
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test "submits a storage request when asked":
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await purchaseAndWait(request)
let submitted = market.requested[0]
check submitted.ask.duration == request.ask.duration
check submitted.ask.size == request.ask.size
check submitted.ask.maxPrice == request.ask.maxPrice
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test "remembers purchases":
let purchase1 = purchasing.purchase(request)
let purchase2 = purchasing.purchase(request)
check purchasing.getPurchase(purchase1.id) == some purchase1
check purchasing.getPurchase(purchase2.id) == some purchase2
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test "has a default value for proof probability":
check purchasing.proofProbability != 0.u256
test "can change default value for proof probability":
purchasing.proofProbability = 42.u256
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await purchaseAndWait(request)
check market.requested[0].ask.proofProbability == 42.u256
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test "can override proof probability per request":
request.ask.proofProbability = 42.u256
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await purchaseAndWait(request)
check market.requested[0].ask.proofProbability == 42.u256
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test "has a default value for request expiration interval":
check purchasing.requestExpiryInterval != 0.u256
test "can change default value for request expiration interval":
purchasing.requestExpiryInterval = 42.u256
let start = getTime().toUnix()
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await purchaseAndWait(request)
check market.requested[0].expiry == (start + 42).u256
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test "can override expiry time per request":
let expiry = (getTime().toUnix() + 42).u256
request.expiry = expiry
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await purchaseAndWait(request)
check market.requested[0].expiry == expiry
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test "includes a random nonce in every storage request":
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await purchaseAndWait(request)
await purchaseAndWait(request)
check market.requested[0].nonce != market.requested[1].nonce
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proc createOffer(request: StorageRequest): StorageOffer =
StorageOffer(
requestId: request.id,
expiry: (getTime() + initDuration(hours = 1)).toUnix().u256
)
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test "selects the cheapest offer":
let purchase = purchasing.purchase(request)
let request = market.requested[0]
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var offer1, offer2 = createOffer(request)
offer1.price = 20.u256
offer2.price = 10.u256
discard await market.offerStorage(offer1)
discard await market.offerStorage(offer2)
clock.set(request.expiry.truncate(int64))
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await purchase.wait()
check purchase.selected == some offer2
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check market.selected[0] == offer2.id
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test "ignores offers that expired":
let expired = (getTime() - initTimeInterval(hours = 1)).toUnix().u256
let purchase = purchasing.purchase(request)
let request = market.requested[0]
var offer1, offer2 = request.createOffer()
offer1.price = 20.u256
offer2.price = 10.u256
offer2.expiry = expired
discard await market.offerStorage(offer1)
discard await market.offerStorage(offer2)
clock.set(request.expiry.truncate(int64))
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await purchase.wait()
check market.selected[0] == offer1.id
test "has a default expiration margin for offers":
check purchasing.offerExpiryMargin != 0.u256
test "ignores offers that are about to expire":
let expiryMargin = purchasing.offerExpiryMargin
let purchase = purchasing.purchase(request)
let request = market.requested[0]
var offer1, offer2 = request.createOffer()
offer1.price = 20.u256
offer2.price = 10.u256
offer2.expiry = getTime().toUnix().u256 + expiryMargin - 1
discard await market.offerStorage(offer1)
discard await market.offerStorage(offer2)
clock.set(request.expiry.truncate(int64))
await purchase.wait()
check market.selected[0] == offer1.id