chore: liquidity graph example

ts-client/src/examples/liquidity_graph.ts

@@ -0,0 +1,79 @@
+import { clusterApiUrl, Connection, PublicKey } from "@solana/web3.js";
+import { DLMM } from "../dlmm";
+import {
+  getBinArrayLowerUpperBinId,
+  getPriceOfBinByBinId,
+} from "../dlmm/helpers";
+import Decimal from "decimal.js";
+
+const RPC = process.env.RPC || clusterApiUrl("mainnet-beta");
+const connection = new Connection(RPC, "confirmed");
+
+const poolAddress = new PublicKey(
+  "HMn6o5rM2NGgNAuYeH7JxRKfQNoQgsiqyxVUYwVpuZcV"
+);
+
+async function main() {
+  const dlmmPool = await DLMM.create(connection, poolAddress, {
+    cluster: "mainnet-beta",
+  });
+
+  const priceAdjustFactor = new Decimal(
+    10 ** (dlmmPool.tokenX.mint.decimals - dlmmPool.tokenY.mint.decimals)
+  );
+
+  const tokenXUiPriceFactor = new Decimal(10 ** dlmmPool.tokenX.mint.decimals);
+  const tokenYUiPriceFactor = new Decimal(10 ** dlmmPool.tokenY.mint.decimals);
+
+  const binArrays = await dlmmPool.getBinArrays();
+  binArrays.sort((a, b) => a.account.index.cmp(b.account.index));
+
+  const liquidityBarChart: {
+    price: Decimal;
+    tokenXAmount: Decimal;
+    tokenYAmount: Decimal;
+    liquidity: Decimal;
+  }[] = [];
+
+  for (const binArray of binArrays) {
+    let binId = getBinArrayLowerUpperBinId(
+      binArray.account.index
+    )[0].toNumber();
+
+    for (const bin of binArray.account.bins) {
+      const binPrice = getPriceOfBinByBinId(binId, dlmmPool.lbPair.binStep);
+
+      const adjustedBinPrice = binPrice
+        .mul(priceAdjustFactor)
+        .mul(tokenYUiPriceFactor)
+        .round()
+        .div(tokenYUiPriceFactor);
+
+      const price = adjustedBinPrice;
+      const tokenXAmount = new Decimal(bin.amountX.toString()).div(
+        tokenXUiPriceFactor
+      );
+      const tokenYAmount = new Decimal(bin.amountY.toString()).div(
+        tokenYUiPriceFactor
+      );
+      const liquidity = tokenXAmount.mul(price).add(tokenYAmount);
+
+      liquidityBarChart.push({
+        price,
+        tokenXAmount,
+        tokenYAmount,
+        liquidity,
+      });
+
+      binId++;
+    }
+  }
+
+  for (const point of liquidityBarChart) {
+    if (point.liquidity.gt(0)) {
+      console.log(point);
+    }
+  }
+}
+
+main();