Add initial working

lib/onValidation.mjs

@@ -0,0 +1,75 @@
+import { writeFile } from 'fs'
+import { createDirectory } from './createDirectory.mjs'
+import 'dotenv/config'
+import { unlData } from './unlData.mjs'
+import { ledgerIndexToFolders } from './ledgerIndexToFolders.mjs'
+
+const lastSeenValidations = []
+let lastCreatedLedgerDir
+
+const onValidation = async ({
+  connectionUrl,
+  networkId,
+  validation,
+}) => {
+  /**
+   * Only proceed if the pubkey is on preferred UNL & reported by node with expected network ID
+   */
+  if (unlData.hosts.indexOf(validation.validation_public_key) > -1 && networkId === unlData.networkid) {
+    unlData.refresh()
+ 
+    const lastSeenKey = `${validation.ledger_index} @ ${validation.validation_public_key}`
+
+    /**
+     * Do not process & write same validation received from multiple nodes twice
+     */
+    if (lastSeenValidations.indexOf(lastSeenKey) < 0) {
+
+      lastSeenValidations.unshift(lastSeenKey)
+      lastSeenValidations.length = unlData.hosts.length * 10
+
+      /**
+       * Write to ledger index folder
+       */
+      const relativeStorDir = 'store/' + networkId + '/' + ledgerIndexToFolders(validation.ledger_index)
+      const storeDir = new URL('../' + relativeStorDir, import.meta.url).pathname
+
+      if (lastCreatedLedgerDir !== validation.ledger_index) {
+        await createDirectory(relativeStorDir)
+        lastCreatedLedgerDir = validation.ledger_index
+
+        writeFile(storeDir + '/vl.json', Buffer.from(JSON.stringify(unlData.data), 'utf8'), err => {
+          if (err) {
+            console.log('Error writing file @ ' + storeDir)
+          }
+        })  
+      }
+
+      /**
+       * Debug output
+       */
+      console.log(
+        networkId,
+        validation.ledger_index,
+        relativeStorDir,
+        validation.validation_public_key,
+        // validation.validated_hash, // parent hash
+        validation.ledger_hash, // ledger_hash
+        connectionUrl,
+      )
+
+      /**
+       * Create validation file
+       */
+      writeFile(storeDir + '/' + validation.validation_public_key + '.json', Buffer.from(JSON.stringify(validation), 'utf8'), err => {
+        if (err) {
+          console.log('Error writing file @ ' + storeDir)
+        }
+      })
+    }
+  }
+}
+
+export {
+  onValidation,
+}