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authorXianny <8582774+xianny@users.noreply.github.com>2018-12-14 05:13:28 +0800
committerGitHub <noreply@github.com>2018-12-14 05:13:28 +0800
commit8906c30f37d82fdaafc084ecee2e3206df8f6e38 (patch)
tree90b53e07c0b9237f5862935575f150596bea043b
parent5744a7f61b0cf1d530e3a1e5c17a59d9ca244999 (diff)
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add special case to scrape OHLCV for eth/usd (#1428)
-rw-r--r--packages/pipeline/src/utils/get_ohlcv_trading_pairs.ts44
1 files changed, 34 insertions, 10 deletions
diff --git a/packages/pipeline/src/utils/get_ohlcv_trading_pairs.ts b/packages/pipeline/src/utils/get_ohlcv_trading_pairs.ts
index 9d3ef2fba..19f81344e 100644
--- a/packages/pipeline/src/utils/get_ohlcv_trading_pairs.ts
+++ b/packages/pipeline/src/utils/get_ohlcv_trading_pairs.ts
@@ -23,6 +23,18 @@ interface CryptoCompareCoin {
const TO_CURRENCIES = ['USD', 'EUR', 'ETH', 'USDT'];
const ETHEREUM_IDENTIFIER = '7605';
const HTTP_OK_STATUS = 200;
+
+interface StaticPair {
+ fromSymbol: string;
+ toSymbol: string;
+}
+const SPECIAL_CASES: StaticPair[] = [
+ {
+ fromSymbol: 'ETH',
+ toSymbol: 'USD',
+ },
+];
+
/**
* Get trading pairs with latest scraped time for OHLCV records
* @param conn a typeorm Connection to postgres
@@ -44,6 +56,7 @@ export async function fetchOHLCVTradingPairsAsync(
FROM raw.ohlcv_external
GROUP BY from_symbol, to_symbol;`);
+ // build addressable index: { fromsym: { tosym: time }}
const latestTradingPairsIndex: { [fromSym: string]: { [toSym: string]: number } } = {};
latestTradingPairs.forEach(pair => {
const latestIndex: { [toSym: string]: number } = latestTradingPairsIndex[pair.from_symbol] || {};
@@ -51,6 +64,13 @@ export async function fetchOHLCVTradingPairsAsync(
latestTradingPairsIndex[pair.from_symbol] = latestIndex;
});
+ // match time to special cases
+ const specialCases: TradingPair[] = SPECIAL_CASES.map(pair => {
+ const latestSavedTime =
+ R.path<number>([pair.fromSymbol, pair.toSymbol], latestTradingPairsIndex) || earliestBackfillTime;
+ return R.assoc('latestSavedTime', latestSavedTime, pair);
+ });
+
// get token symbols used by Crypto Compare
const allCoinsResp = await fetchAsync(COINLIST_API);
if (allCoinsResp.status !== HTTP_OK_STATUS) {
@@ -66,27 +86,31 @@ export async function fetchOHLCVTradingPairsAsync(
});
// fetch all tokens that are traded on 0x
- const rawTokenAddresses: Array<{ tokenaddress: string }> = await conn.query(
+ const rawEventTokenAddresses: Array<{ tokenaddress: string }> = await conn.query(
`SELECT DISTINCT(maker_token_address) as tokenaddress FROM raw.exchange_fill_events UNION
SELECT DISTINCT(taker_token_address) as tokenaddress FROM raw.exchange_fill_events`,
);
- const tokenAddresses = R.pluck('tokenaddress', rawTokenAddresses);
+
+ // tslint:disable-next-line:no-unbound-method
+ const eventTokenAddresses = R.pluck('tokenaddress', rawEventTokenAddresses).map(R.toLower);
// join token addresses with CC symbols
- const allTokenSymbols: string[] = tokenAddresses
- .map(tokenAddress => erc20CoinsIndex.get(tokenAddress.toLowerCase()) || '')
- .filter(x => x);
+ const eventTokenSymbols: string[] = eventTokenAddresses
+ .filter(tokenAddress => erc20CoinsIndex.has(tokenAddress))
+ .map(tokenAddress => erc20CoinsIndex.get(tokenAddress) as string);
- // generate list of all tokens with time of latest existing record OR default earliest time
- const allTradingPairCombinations: TradingPair[] = R.chain(sym => {
+ // join traded tokens with fiat and latest backfill time
+ const eventTradingPairs: TradingPair[] = R.chain(sym => {
return TO_CURRENCIES.map(fiat => {
- return {
+ const pair = {
fromSymbol: sym,
toSymbol: fiat,
latestSavedTime: R.path<number>([sym, fiat], latestTradingPairsIndex) || earliestBackfillTime,
};
+ return pair;
});
- }, allTokenSymbols);
+ }, eventTokenSymbols);
- return allTradingPairCombinations;
+ // join with special cases
+ return R.concat(eventTradingPairs, specialCases);
}