54 lines
1.6 KiB
TypeScript
54 lines
1.6 KiB
TypeScript
import { useEffect, useMemo } from 'react'
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import { Orderbook, Market } from '@project-serum/serum'
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import useMarket from './useMarket'
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import useMangoStore from '../stores/useMangoStore'
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export function useAccountData(publicKey) {
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const account = publicKey ? publicKey.toString() : null
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const accountInfo = useMangoStore((s) => s.accountInfos[account])
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return accountInfo && Buffer.from(accountInfo.data)
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}
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export function useOrderbookAccounts(market: Market) {
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// @ts-ignore
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const bidData = useAccountData(market && market._decoded.bids)
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// @ts-ignore
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const askData = useAccountData(market && market._decoded.asks)
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return {
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bidOrderbook: market && bidData ? Orderbook.decode(market, bidData) : null,
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askOrderbook: market && askData ? Orderbook.decode(market, askData) : null,
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}
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}
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export default function useOrderbook(
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depth = 20
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): [{ bids: number[][]; asks: number[][] }, boolean] {
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const setMangoStore = useMangoStore((s) => s.set)
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const { market } = useMarket()
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const { bidOrderbook, askOrderbook } = useOrderbookAccounts(market)
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const bids = useMemo(
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() =>
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!bidOrderbook || !market
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? []
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: bidOrderbook.getL2(depth).map(([price, size]) => [price, size]),
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[bidOrderbook, depth, market]
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)
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const asks = useMemo(
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() =>
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!askOrderbook || !market
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? []
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: askOrderbook.getL2(depth).map(([price, size]) => [price, size]),
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[askOrderbook, depth, market]
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)
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useEffect(() => {
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setMangoStore((state) => {
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state.market.orderBook = [{ bids, asks }, !!bids || !!asks]
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})
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}, [bids, asks])
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return [{ bids, asks }, !!bids || !!asks]
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}
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