feat: add a check-validator.js script to verify node keys

packages/cosmic-swingset/check-validator.js

@@ -0,0 +1,84 @@
+#! /usr/bin/env node
+/* global process require Buffer */
+// check-validator - Find if there is a validator that matches the current ag-chain-cosmos
+// Michael FIG <mfig@agoric.com>, 2021-05-06
+const oper = process.argv[2];
+
+const { spawnSync } = require('child_process');
+
+console.log('Fetching current validators matching', oper || 'ALL');
+const ret = spawnSync('ag-cosmos-helper', [
+  'query',
+  'staking',
+  'validators',
+  '--limit=1000',
+  '-ojson',
+]);
+if (ret.error) {
+  throw ret.error;
+}
+if (ret.stderr) {
+  process.stderr.write(ret.stderr);
+}
+if (ret.code) {
+  process.exit(ret.code);
+}
+
+const output = ret.stdout.toString('utf-8');
+let obj;
+try {
+  obj = JSON.parse(output);
+} catch (e) {
+  console.error('Cannot parse:', output);
+  throw e;
+}
+
+if (!obj || !Array.isArray(obj.validators)) {
+  console.error('Bad shape:', obj);
+  throw Error(`Could not parse validators`);
+}
+
+const narrow = obj.validators.filter(
+  validator => !oper || validator.operator_address === oper,
+);
+
+const opKeys = narrow.map(({ operator_address: op, consensus_pubkey: pk }) => {
+  const pkHex = Buffer.from(pk.key, 'base64').toString('hex');
+  return { op, pkHex, pk };
+});
+
+console.log('Fetching current node pubkey...');
+const ret2 = spawnSync('ag-chain-cosmos', ['tendermint', 'show-validator']);
+const selfPub = ret2.stdout.toString('utf-8').trim();
+console.log(selfPub);
+console.log('Fetching current node hex...');
+const ret3 = spawnSync('ag-cosmos-helper', [
+  'keys',
+  'parse',
+  '--output=json',
+  selfPub,
+]);
+const selfParse = ret3.stdout.toString('utf-8');
+let selfParseObj;
+try {
+  selfParseObj = JSON.parse(selfParse);
+} catch (e) {
+  console.error('Cannot parse', selfParse);
+  throw e;
+}
+
+const selfHex = selfParseObj.bytes;
+console.log(selfHex);
+
+console.log('Matching pubkeys...');
+const lselfHex = selfHex.toLowerCase();
+const match = opKeys.find(({ pkHex }) =>
+  lselfHex.endsWith(pkHex.toLowerCase()),
+);
+
+if (!match) {
+  console.log(JSON.stringify(narrow, null, 2));
+  throw Error(`Sorry!  We couldn't find your node!`);
+}
+
+console.log('Congratulations!  Your node is at', match);