ohlc's

src/blockchain/ohlcs.js

@@ -0,0 +1,48 @@
+import {socket} from "@/socket.js";
+import {useStore} from "@/store/store.js";
+import {Exchange} from "@/blockchain/orderlib.js";
+import {uniswapV3PoolAddress} from "@/blockchain/uniswap.js";
+import {ethers, FixedNumber} from "ethers";
+import {uniswapV3PoolAbi} from "@/blockchain/abi.js";
+
+const ohlcSubCounts = {} // key is route and value is a subscription counter
+export const WIDE_PRICE_FORMAT = {decimals:38, width:512, signed:false}; // 38 decimals is 127 bits
+
+
+export function subOHLCs( chainId, poolPeriods ) {
+    if( !poolPeriods.length )
+        return
+    const toSub = []
+    for( const [pool,period] of poolPeriods ) {
+        const key = `${pool}|${period}`
+        if (!(key in ohlcSubCounts) || ohlcSubCounts[key] === 0) {
+            ohlcSubCounts[key] = 1
+            toSub.push(key)
+        } else {
+            ohlcSubCounts[key]++
+        }
+    }
+    if( toSub.length )
+        socket.emit('subOHLCs', chainId, toSub)
+}
+
+export function unsubPrices( chainId, poolPeriods ) {
+    const toUnsub = []
+    for( const [pool,period] of poolPeriods ) {
+        const key = `${pool}|${period}`
+        if (!(key in ohlcSubCounts) || ohlcSubCounts[key] === 0) {
+            console.error('overdecremented',pool,period)
+            ohlcSubCounts[key] = 1
+            toSub.push(key)
+        } else {
+            ohlcSubCounts[key]--
+            if( ohlcSubCounts[key] == 0 )
+                toUnsub.push(key)
+        }
+    }
+    if( toUnsub.length )
+        socket.emit('unsubOHLCs', chainId, toUnsub )
+}
+
+// todo get history
+