feat(http): expose registeredHandler

lib/ag-solo/vats/bootstrap.js

@@ -47,6 +47,11 @@ export default function setup(syscall, state, helpers) {
           moolaMint: await E(vats.mints).getMint('moola'),
           simoleanMint: await E(vats.mints).getMint('simolean'),
           spawner,
+          http: {
+            registerCommandHandler(handler) {
+              return E(vats.http).registerCommandHandler(handler);
+            },
+          },
           wallet: await E(vats.wallet).getWallet(),
         });
       }

lib/ag-solo/vats/vat-http.js

@@ -36,6 +36,12 @@ function build(E, D) {
   const registeredHandlers = [];
   let canvasState;
 
+  // TODO: Don't leak memory.
+  async function registerCommandHandler(newHandler) {
+    const commandHandler = await E(newHandler).getCommandHandler();
+    registeredHandlers.push(commandHandler);
+  }
+
   return {
     setCommandDevice(d, ROLES) {
       commandDevice = d;
@@ -118,10 +124,7 @@ function build(E, D) {
       }
     },
 
-    async registerCommandHandler(newHandler) {
-      const commandHandler = await E(newHandler).getCommandHandler();
-      registeredHandlers.push(commandHandler);
-    },
+    registerCommandHandler,
 
     setProvisioner(p) {
       provisioner = p;
@@ -171,8 +174,11 @@ function build(E, D) {
           res = await handler[type](obj);
         } else {
           // todo fixme avoid the loop
-          for (let i = 0; i < registeredHandlers.length; i++) {
-            res = await E(registeredHandlers[i]).processInbound(obj);
+          // For now, go from the end to beginning so that handlers
+          // override.
+          const hardObjects = harden({...homeObjects});
+          for (let i = registeredHandlers.length - 1; i >= 0; i++) {
+            res = await E(registeredHandlers[i]).processInbound(obj, hardObjects);
             if (res) {
               break;
             }