Initial

README.md

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+This example uses [Blocknative's SDK](https://github.com/blocknative/sdk) to watch the Ethereum mempool looking for the transaction activating the Dotdotdots(NFT) Smart Contract minting.
+`npm install` then `node index.js`
+This plays on the article from Pawel Urbanek - [Hunting for Rare NFTs in the Ethereum Dark Forest](https://pawelurbanek.com/ethereum-mempool-monitoring)
+Please checkout all the awesome products from [Blocknative](https://www.blocknative.com)
+[Blocknative Docs](https://docs.blocknative.com/)

index.js

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+import BlocknativeSdk from 'bnc-sdk';
+import WebSocket from 'ws';
+import { dotDotDotAbi } from './abi.js';
+
+const DOT_CONTRACT_ADDRESS = "0x67Ed645EC1994c60d7e3664CA2bEd0A56B48595F";
+const DOT_CONTRACT_ABI = dotDotDotAbi;
+const DOT_ADMIN_ADDRESS = "0xd29dcbd273d73714eb6bea7bd4f8d99d0fbc3398"
+
+const options = {
+  dappId: '25b387fb-bf21-42ec-a093-9d37e4267a7a',
+  networkId: 1,
+  system: 'ethereum',
+  ws: WebSocket,
+  transactionHandlers: [async (event) => await mint(event.transaction)],
+  onerror: (error) => {console.error('error!!!   ', error)}
+}
+
+const main = async () => {
+  const sdk = new BlocknativeSdk(options)
+  console.log('listening until error msg is seen...')
+  await sdk.configuration({
+    scope: DOT_CONTRACT_ADDRESS,
+    abi: DOT_CONTRACT_ABI,
+    filters: [
+      { from:  DOT_ADMIN_ADDRESS },
+      { "contractCall.methodName": "flipSaleState" },
+      { status: "pending" }
+    ],
+    watchAddress: true
+  })
+}
+
+const mint = async (txData) => {
+  await signer.sendTransaction({
+    to: DOT_CONTRACT_ADDRESS,
+    data: mintOne,
+    type: 2,
+    value: ETHER.div(100).mul(5),
+    maxFeePerGas: BigNumber.from(txData.maxFeePerGas).sub(1),
+    maxPriorityFeePerGas: txData.maxPriorityFeePerGas,
+    gasLimit: 200000,
+    chainId: 1
+  })
+}
+
+await main()