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backend/utils/create2.js

@@ -0,0 +1,21 @@
+const { keccak256, getAddress } = require('ethers').utils || require('ethers');
+
+function toBytes(hex) {
+  if (hex.startsWith('0x')) return Buffer.from(hex.slice(2), 'hex');
+  return Buffer.from(hex, 'hex');
+}
+
+function computeCreate2Address(factory, saltHex, initCodeHash) {
+  const parts = [
+    '0xff',
+    factory.toLowerCase(),
+    saltHex.toLowerCase(),
+    initCodeHash.toLowerCase()
+  ].map(x => x.startsWith('0x') ? x.slice(2) : x).join('');
+  const hash = '0x' + require('crypto').createHash('sha3-256').update(Buffer.from(parts, 'hex')).digest('hex');
+  return '0x' + hash.slice(-40);
+}
+
+module.exports = { computeCreate2Address };
+
+