replace alchemy with moralis

package.json

@@ -1,12 +1,12 @@
 {
   "dependencies": {
-    "alchemy-sdk": "^3.5.0",
     "better-sqlite3": "^11.7.0",
     "ethers": "^6.13.4",
     "express": "^4.21.2",
+    "moralis": "^2.27.2",
     "sqlite3": "^5.1.7"
   },
-  "name": "alchemy-nft-scraper",
+  "name": "nft-sales-scraper",
   "module": "index.ts",
   "devDependencies": {
     "@types/bun": "latest"

src/index.js

@@ -1,18 +1,15 @@
 const ALL_CONTRACTS = require('./contracts');
 
-const { Alchemy, Network } = require("alchemy-sdk");
+import Moralis from 'moralis';
 const { Database } = require('sqlite3');
 const fs = require('fs');
 
 
 const db = new Database('./state/sqlite.db');
 const config = {
-  apiKey: process.env.ALCHEMY_KEY,
+  apiKey: process.env.MORALIS_KEY
-  network: Network.ETH_MAINNET,
 };
 
-const alchemy = new Alchemy(config);
-
 
 async function sleep(sec) {
   return new Promise((resolve) => setTimeout(resolve, Number(sec) * 1000));
@@ -34,7 +31,7 @@ class Scrape {
     this.lastFile = `./state/${this.contractName}.txt`;
   }
 
-  getpageKey() {
+  getCursor() {
     if (fs.existsSync(this.lastFile)) {
       return fs.readFileSync(this.lastFile).toString();
     } else {
@@ -44,26 +41,28 @@ class Scrape {
   }
 
   async scrape() {
-    const pageKey = this.getpageKey()
+    const cursor = this.getCursor()
-    if (pageKey === '') {
+    if (cursor === '') {
-      console.log('no page key')
+      console.log(`no cursor for ${this.contractName}. skipping`)
       return
     }
 
-    console.log(`[+] Scraping ${this.contractName} with pageKey ${pageKey}`)
+    console.log(`[+] Scraping ${this.contractName}`);
-    const response = await alchemy.nft.getNftSales({
+    const response = await Moralis.EvmApi.nft.getNFTTrades({
+      chain: '0x1',
+      marketplace: 'opensea',
       fromBlock: this.startBlock,
-      contractAddress: this.contractAddress,
+      address: this.contractAddress,
       limit: process.env.LIMIT,
-      order: 'asc',
+      cursor: cursor
-      pageKey: pageKey
     });
 
-    fs.writeFileSync(this.lastFile, response.pageKey || '')
+    fs.writeFileSync(this.lastFile, response.json.cursor || '')
 
-    response.nftSales.map(async (sale) => {
+    response.json.result.map(async (sale) => {
+      sale.token_ids.map(async (tokenId) => {
         const rowExists = await new Promise((resolve) => {
-        db.get('SELECT * FROM events WHERE tx_hash = ? AND log_index = ?', [sale.transactionHash, sale.logIndex], (err, row) => {
+          db.get('SELECT * FROM events WHERE tx_hash = ? AND token_id = ?', [sale.transaction_hash, tokenId], (err, row) => {
             if (err) { resolve(false); }
             resolve(row !== undefined);
           });
@@ -73,23 +72,18 @@ class Scrape {
             db.run(`
               INSERT INTO events VALUES (
               "${this.contractAddress}",
-            "${sale.buyerAddress}",
+              "${sale.buyer_address}",
-            "${sale.sellerAddress}",
+              "${sale.seller_address}",
-            "${sale.taker}",
+              "${tokenId}",
-            "${sale.tokenId}",
+              "${sale.price}",
-            "${sale.sellerFee.amount}",
-            "${sale.protocolFee.amount}",
-            "${sale.royaltyFee.amount}",
               "",
-            "${sale.transactionHash}",
+              "${sale.transaction_hash}",
-            "${sale.blockNumber}",
+              "${sale.block_number}",
-            "${sale.logIndex}",
+              "opensea",
-            "${sale.bundleIndex}",
+              "${cursor}",
-            "${sale.marketplace}",
-            "${pageKey}",
               0, 0
             )`);
-          console.log(` ::: Inserted sale of ${this.contractName} #${sale.tokenId} in block ${sale.blockNumber} for ${sale.sellerFee.amount} wei.`)
+            console.log(` ::: Inserted sale of ${this.contractName} #${tokenId} in block ${sale.block_number} for ${sale.price} wei.`)
           } catch(err) {
             console.log(`Error when writing to database: ${err}`);
             return false;
@@ -97,6 +91,8 @@ class Scrape {
         }
       });
 
+    });
+
     await sleep(1);
 
   }
@@ -119,25 +115,21 @@ class Scrape {
           contract text,
           buyer text,
           seller text,
-          taker text,
           token_id number,
           sale_price text,
-          protocol_fee text,
-          royalty_fee text,
           tx_date text,
           tx_hash text,
           block_number number,
-          log_index number,
-          bundle_index number,
           marketplace text,
-          page_key text,
+          cursor text,
           discord_sent number,
           twitter_sent number,
-          UNIQUE(tx_hash, log_index, bundle_index)
+          UNIQUE(tx_hash, token_id)
         );`,
       );
     });
   }
+  await Moralis.start(config);
   while(true) {
     for(const contract in ALL_CONTRACTS) {
       if (process.env.ONLY && process.env.ONLY != contract) continue

src/server.js

@@ -61,7 +61,7 @@ app.get('/api/latest', (req, res) => {
 app.get('/api/:contractAddress/data', (req, res) => {
     const results = [];
     const stmt = db.prepare(`select
-        block_number block,
+        (block_number / 100) * 100 block,
         sum(sale_price/1000000000000000000.0) volume,
         avg(sale_price/1000000000000000000.0) average_price,
         (select avg(sale_price/1000000000000000000.0) from (select * from events