clients/js: add command to return all evm chains

Also add an option to 'evm info' to return the implementation only. This
is an optimisation to make this query faster when we don't care about
the rest

clients/js/Makefile

@@ -15,8 +15,8 @@ dependencies: node_modules
 
 build: node_modules $(SOURCE_FILES)
 	@mkdir -p build
-	@touch -m build
 	npm run build
+	@touch -m build
 
 install: build
 	@echo Linking binaries

clients/js/evm.ts

@@ -104,6 +104,38 @@ export async function query_contract_evm(
   return result
 }
 
+export async function getImplementation(
+  network: "MAINNET" | "TESTNET" | "DEVNET",
+  chain: EVMChainName,
+  module: "Core" | "NFTBridge" | "TokenBridge",
+  contract_address: string | undefined,
+  _rpc: string | undefined
+): Promise<ethers.BigNumber> {
+  let n = NETWORKS[network][chain]
+  let rpc: string | undefined = _rpc ?? n.rpc;
+  if (rpc === undefined) {
+    throw Error(`No ${network} rpc defined for ${chain} (see networks.ts)`)
+  }
+
+  let contracts: Contracts = CONTRACTS[network][chain]
+
+  switch (module) {
+    case "Core":
+      contract_address = contract_address ? contract_address : contracts.core;
+      break
+    case "TokenBridge":
+      contract_address = contract_address ? contract_address : contracts.token_bridge;
+      break
+    case "NFTBridge":
+      contract_address = contract_address ? contract_address : contracts.nft_bridge;
+      break
+    default:
+      impossible(module)
+  }
+
+  return (await getStorageAt(rpc, contract_address, _IMPLEMENTATION_SLOT, ["address"]))[0]
+}
+
 export async function execute_governance_evm(
   payload: Payload,
   vaa: Buffer,

clients/js/main.ts

@@ -5,7 +5,7 @@ import { hideBin } from "yargs/helpers";
 
 import { isTerraChain, assertEVMChain, CONTRACTS, setDefaultWasm } from "@certusone/wormhole-sdk";
 import { execute_governance_solana } from "./solana";
-import { execute_governance_evm, hijack_evm, query_contract_evm, setStorageAt } from "./evm";
+import { execute_governance_evm, getImplementation, hijack_evm, query_contract_evm, setStorageAt } from "./evm";
 import { execute_governance_terra } from "./terra";
 import * as vaa from "./vaa";
 import { impossible, Payload, serialiseVAA, VAA } from "./vaa";
@@ -309,6 +309,11 @@ yargs(hideBin(process.argv))
         const result = await setStorageAt(argv["rpc"], evm_address(argv["contract-address"]), argv["storage-slot"], ["uint256"], [argv["value"]]);
         console.log(result);
       })
+      .command("chains", "Return all EVM chains",
+        async (_) => {
+          console.log(Object.values(CHAINS).map(id => toChainName(id)).filter(name => isEVMChain(name)).join(" "))
+        }
+      )
       .command("info", "Query info about the on-chain state of the contract", (yargs) => {
         return yargs
           .option("chain", {
@@ -337,6 +342,13 @@ yargs(hideBin(process.argv))
             describe: "Contract to query (override config)",
             type: "string",
             required: false,
+          })
+          .option("implementation-only", {
+            alias: "i",
+            describe: "Only query implementation (faster)",
+            type: "boolean",
+            default: false,
+            required: false,
           });
       }, async (argv) => {
         assertChain(argv["chain"])
@@ -354,7 +366,11 @@ yargs(hideBin(process.argv))
           | "NFTBridge"
           | "TokenBridge";
         let rpc = argv["rpc"] ?? NETWORKS[network][argv["chain"]].rpc
-        console.log(JSON.stringify(await query_contract_evm(network, argv["chain"], module, argv["contract-address"], rpc), null, 2))
+        if (argv["implementation-only"]) {
+          console.log(await getImplementation(network, argv["chain"], module, argv["contract-address"], rpc))
+        } else {
+          console.log(JSON.stringify(await query_contract_evm(network, argv["chain"], module, argv["contract-address"], rpc), null, 2))
+        }
       })
       .command("hijack", "Override the guardian set of the core bridge contract during testing (anvil or hardhat)", (yargs) => {
         return yargs