refactored watcher; produces logs

vault.js

@@ -1,5 +1,51 @@
+import {ethers} from "ethers";
+import {getAbi} from "./abi.js";
+import {getProvider, getSigner} from "./blockchain.js";
+import {Cache} from './cache.js';
+
+const DEPLOYER_ADDRESS = '0xF99aB16Bd8398EAf12407D05A0F8824316008E99'
+const VAULT_INIT_CODE_HASH = '0xbf043f7035d5aa3be2b3c94df5b256fbe24675689327af4ab71c48194c463031'
+
+const vaults = new Cache('vaults') // vault:owner
+
+const deployerAbi = await getAbi('VaultDeployer');
+
+
+function newVault(address, owner) {
+    return {address, owner, balances: {}}
+}
+
+export function vaultAddress(chainId, ownerAddress) {
+    const encoded = ethers.AbiCoder.defaultAbiCoder().encode(['address'], [ownerAddress])
+    const salt = ethers.keccak256(encoded)
+    return ethers.getCreate2Address(DEPLOYER_ADDRESS, salt, VAULT_INIT_CODE_HASH)
+}
+
 
 export function loginAddress(socket, chainId, address) {
     // todo check for existing vault
-    // todo send welcome with basic info
-}
+    if (!vaults[address]) {
+        //
+    } else {
+        // todo send welcome with basic info and extra tokens
+
+    }
+}
+
+
+export async function ensureVault(socket, chainId, owner) {
+    const address = vaultAddress(chainId, owner)
+    if (!vaults[address]) {
+        const deployer = new ethers.Contract(DEPLOYER_ADDRESS, deployerAbi, getSigner(chainId))
+        await deployer.deployVault(owner)
+    }
+}
+
+
+export async function watchVaultCreated(provider, db, event) {
+    console.log(`vault created`, event)
+}
+
+export async function watchErc20Transfer(provider, db, event) {
+    console.log('Transfer', event)
+}