Add config for fixie static ip proxy.

blockchain/.env.example

@@ -43,3 +43,6 @@ SENTRY_DSN=""
 
 # Logging level
 LOG_LEVEL="debug"
+
+# Fixie proxy URL for BitGo requests (optional)
+# FIXIE_URL=""

blockchain/src/bitgo.ts

@@ -18,12 +18,17 @@ export async function initBitGo() {
     throw new Error(`BitGo cannot be used on anything but mainnet, connected node is ${network}`);
   }
 
+  const proxy = env.FIXIE_URL || undefined;
   const bitgo = new BitGo({
     env: 'prod', // Non-prod ZEC is not supported
     accessToken: env.BITGO_ACCESS_TOKEN,
+    proxy,
   });
   bitgoWallet = await bitgo.coin('zec').wallets().get({ id: env.BITGO_WALLET_ID });
   log.info(`Initialized BitGo wallet "${bitgoWallet.label()}"`);
+  if (proxy) {
+    log.info(`Proxying BitGo requests through ${proxy}`);
+  }
 }
 
 export async function getContributionAddress(id: number) {

blockchain/src/env.ts

@@ -30,12 +30,14 @@ const DEFAULTS = {
   TESTNET_START_BLOCK: "390000",
 
   SENTRY_DSN: "",
+  FIXIE_URL: "",
 };
 
 const OPTIONAL: { [key: string]: undefined | boolean } = {
   BITGO_WALLET_ID: true,
   BITGO_ACCESS_TOKEN: true,
   BIP32_XPUB: true,
+  FIXIE_URL: true,
   // NOTE: Remove these from optional when sapling is ready
   SPROUT_ADDRESS: true,
   SPROUT_VIEWKEY: true,

blockchain/types/bitgo.d.ts

@@ -61,6 +61,7 @@ declare module 'bitgo' {
   interface BitGoOptions {
     env: 'test' | 'prod';
     accessToken: string;
+    proxy?: string;
   }
 
   export class BitGo {