fix(@wallet): cache price to avoid multiple call

fixes #5144
This commit is contained in:
Anthony Laibe 2022-03-24 11:06:55 +01:00 committed by Anthony Laibe
parent 7bbefa5518
commit acb38a4c4c
2 changed files with 27 additions and 0 deletions

View File

@ -14,6 +14,7 @@ import ../../../backend/accounts as status_go_accounts
import ../../../backend/tokens as status_go_tokens
import ../../../backend/wallet as status_go_wallet
import ../../../backend/eth as status_go_eth
import ../../../backend/cache
export dto
@ -87,6 +88,9 @@ type
networkService: network_service.Service
accounts: OrderedTable[string, WalletAccountDto]
priceCache: TimedCache
proc delete*(self: Service) =
discard
@ -104,6 +108,7 @@ proc newService*(
result.tokenService = tokenService
result.networkService = networkService
result.accounts = initOrderedTable[string, WalletAccountDto]()
result.priceCache = newTimedCache()
proc buildTokens(
self: Service,
@ -143,12 +148,16 @@ proc buildTokens(
)
proc getPrice*(self: Service, crypto: string, fiat: string): float64 =
let cacheKey = crypto & fiat
if self.priceCache.isCached(cacheKey):
return parseFloat(self.priceCache.get(cacheKey))
var prices = initTable[string, float]()
try:
let response = status_go_wallet.fetchPrices(@[crypto], fiat)
for (symbol, value) in response.result.pairs:
prices[symbol] = value.getFloat
self.priceCache.set(cacheKey, $value.getFloat)
except Exception as e:
let errDesription = e.msg
error "error: ", errDesription

18
src/backend/cache.nim Normal file
View File

@ -0,0 +1,18 @@
import tables, times
type Value* = ref object
value*: string
timestamp*: DateTime
type TimedCache* = Table[string, Value]
proc newTimedCache*(): TimedCache = initTable[string, Value]()
proc isCached*(self: TimedCache, cacheKey: string, duration=initDuration(minutes = 5)): bool =
self.hasKey(cacheKey) and ((self[cacheKey].timestamp + duration) >= now())
proc set*(self: var TimedCache, cacheKey: string, value: string) =
self[cacheKey] = Value(value: value, timestamp: now())
proc get*(self: var TimedCache, cacheKey: string): string = self[cacheKey].value