ZcashClient.sync()

Currently synchronous, but that's fine for a demo.

envoy/envoy.Dockerfile

@@ -0,0 +1,3 @@
+FROM envoyproxy/envoy:latest
+COPY ./envoy.yaml /etc/envoy/envoy.yaml
+CMD /usr/local/bin/envoy -c /etc/envoy/envoy.yaml

envoy/envoy.yaml

@@ -0,0 +1,45 @@
+admin:
+  access_log_path: /tmp/admin_access.log
+  address:
+    socket_address: { address: 0.0.0.0, port_value: 9901 }
+
+static_resources:
+  listeners:
+  - name: listener_0
+    address:
+      socket_address: { address: 0.0.0.0, port_value: 8081 }
+    filter_chains:
+    - filters:
+      - name: envoy.http_connection_manager
+        config:
+          codec_type: auto
+          stat_prefix: ingress_http
+          route_config:
+            name: local_route
+            virtual_hosts:
+            - name: local_service
+              domains: ["*"]
+              routes:
+              - match: { prefix: "/" }
+                route:
+                  cluster: lightwalletd_frontend
+                  max_grpc_timeout: 0s
+              cors:
+                allow_origin:
+                - "*"
+                allow_methods: GET, PUT, DELETE, POST, OPTIONS
+                allow_headers: keep-alive,user-agent,cache-control,content-type,content-transfer-encoding,custom-header-1,x-accept-content-transfer-encoding,x-accept-response-streaming,x-user-agent,x-grpc-web,grpc-timeout
+                max_age: "1728000"
+                expose_headers: custom-header-1,grpc-status,grpc-message
+                enabled: true
+          http_filters:
+          - name: envoy.grpc_web
+          - name: envoy.cors
+          - name: envoy.router
+  clusters:
+  - name: lightwalletd_frontend
+    connect_timeout: 0.25s
+    type: logical_dns
+    http2_protocol_options: {}
+    lb_policy: round_robin
+    hosts: [{ socket_address: { address: localhost, port_value: 9067 }}]