feat(ag-trade): get local node info using cosmos-fetch endo plugin

packages/ag-trade/Makefile

@@ -0,0 +1,18 @@
+STATE=$(shell endo where state)
+PET=$(STATE)/pet-store
+
+where:
+	@echo state: $(STATE)
+
+node-info: $(PET)/local
+	endo eval "E(local.lcd).getJSON('/node_info').then(i => i.node_info)" local
+
+$(PET)/local: src/net-local.js $(PET)/cosmos-fetch
+	endo make src/net-local.js -n local -p cosmos-fetch
+
+$(PET)/cosmos-fetch: src/cosmosFetch.js
+	@echo ++ install cosmos fetch plugin
+	endo make --UNSAFE src/cosmosFetch.js -n cosmos-fetch
+
+clean:
+	endo reset

packages/ag-trade/src/net-local.js

@@ -0,0 +1,22 @@
+/**
+ * Usage:
+ * $ endo make --UNSAFE src/cosmosFetch.js -n cosmos-fetch
+ * Object [Alleged: CosmosFetch] {}
+ * $ endo make test/net-local.js -n local -p cosmos-fetch
+ * { lcd: Object [Alleged: LCD] {}, rpc: Object [Alleged: RpcClient] {} }
+ */
+import { E } from '@endo/far';
+
+const loc = {
+  lcd: 'http://localhost:1317',
+  rpc: 'http://localhost:26657',
+};
+
+export const make = async net => {
+  const [lcd, rpc] = await Promise.all([
+    E(net).makeLCDClient(loc.lcd),
+    E(net).makeRPCClient(loc.rpc),
+  ]);
+
+  return harden({ lcd, rpc });
+};