From e09e8fccc0ab330c5b7bc64670f9d68b0244882d Mon Sep 17 00:00:00 2001
From: 0xPatrick <patrick@0xpatrick.dev>
Date: Wed, 7 Aug 2024 17:38:35 -0400
Subject: [PATCH] feat: add hermes client to tools

---
 multichain-testing/test/support.ts       |  4 +-
 multichain-testing/tools/hermes-tools.ts | 71 ++++++++++++++++++++++++
 2 files changed, 74 insertions(+), 1 deletion(-)
 create mode 100644 multichain-testing/tools/hermes-tools.ts

diff --git a/multichain-testing/test/support.ts b/multichain-testing/test/support.ts
index 98f7c0490ac0..c5d129b60916 100644
--- a/multichain-testing/test/support.ts
+++ b/multichain-testing/test/support.ts
@@ -9,6 +9,7 @@ import { makeGetFile, makeSetupRegistry } from '../tools/registry.js';
 import { generateMnemonic } from '../tools/wallet.js';
 import { makeRetryUntilCondition } from '../tools/sleep.js';
 import { makeDeployBuilder } from '../tools/deploy.js';
+import { makeHermes } from '../tools/hermes-tools.js';
 
 const setupRegistry = makeSetupRegistry(makeGetFile({ dirname, join }));
 
@@ -59,8 +60,9 @@ export const commonSetup = async (t: ExecutionContext) => {
     log: t.log,
     setTimeout: globalThis.setTimeout,
   });
+  const hermes = makeHermes(childProcess);
 
-  return { useChain, ...tools, ...keyring, retryUntilCondition, deployBuilder };
+  return { useChain, ...tools, ...keyring, retryUntilCondition, deployBuilder, hermes };
 };
 
 export type SetupContext = Awaited<ReturnType<typeof commonSetup>>;
diff --git a/multichain-testing/tools/hermes-tools.ts b/multichain-testing/tools/hermes-tools.ts
new file mode 100644
index 000000000000..d2b061ab6fd1
--- /dev/null
+++ b/multichain-testing/tools/hermes-tools.ts
@@ -0,0 +1,71 @@
+import type { IBCChannelID, IBCConnectionID, IBCPortID } from '@agoric/vats';
+import type { ExecSync } from './agd-lib.js';
+
+const kubectlBinary = 'kubectl';
+
+// based on config.yaml
+const relayerMap = {
+  osmosis: 'hermes-agoric-osmosis-0',
+  cosmoshub: 'hermes-agoric-gaia-0',
+};
+
+const getBinaryArgs = (chainName: string) => {
+  if (!relayerMap[chainName]) throw Error('Unsupported chain: ' + chainName);
+  return [
+    'exec',
+    '-i',
+    relayerMap[chainName],
+    '-c',
+    'relayer',
+    '--tty=false',
+    '--',
+    'hermes',
+  ];
+};
+
+type ChannelCloseParams = {
+  dst: {
+    chainId: string;
+    portID: IBCPortID;
+    channelID: IBCChannelID;
+    connectionID: IBCConnectionID;
+  };
+  src: {
+    chainId: string;
+    portID: IBCPortID;
+    channelID: IBCChannelID;
+  };
+};
+
+export const makeHermes = ({ execFileSync }: { execFileSync: ExecSync }) => {
+  const exec = (
+    chainName: string,
+    args: string[],
+    opts = { encoding: 'utf-8' as const, stdio: ['ignore', 'pipe', 'ignore'] },
+  ) =>
+    execFileSync(kubectlBinary, [...getBinaryArgs(chainName), ...args], opts);
+
+  /** Submit MsgChannelCloseInit to the src chain */
+  const channelCloseInit = (
+    chainName: string,
+    dst: ChannelCloseParams['dst'],
+    src: ChannelCloseParams['src'],
+  ) => {
+    return exec(chainName, [
+      'tx',
+      'chan-close-init',
+      `--dst-chain=${dst.chainId}`,
+      `--src-chain=${src.chainId}`,
+      `--dst-connection=${dst.connectionID}`,
+      `--dst-port=${dst.portID}`,
+      `--src-port=${src.portID}`,
+      `--dst-channel=${dst.channelID}`,
+      `--src-channel=${src.channelID}`,
+    ]);
+  };
+
+  return {
+    exec,
+    channelCloseInit,
+  };
+};