Merge pull request #3 from Permissionless-Software-Foundation/ct-unstable

feat(balance): Added Fulcrum balance call to REST and JSON

config/env/common.js

@@ -13,9 +13,15 @@ module.exports = {
   logPass: 'test',
 
   // Email server settings if nodemailer email notifications are used.
-  emailServer: process.env.EMAILSERVER ? process.env.EMAILSERVER : 'mail.someserver.com',
-  emailUser: process.env.EMAILUSER ? process.env.EMAILUSER : 'noreply@someserver.com',
-  emailPassword: process.env.EMAILPASS ? process.env.EMAILPASS : 'emailpassword',
+  emailServer: process.env.EMAILSERVER
+    ? process.env.EMAILSERVER
+    : 'mail.someserver.com',
+  emailUser: process.env.EMAILUSER
+    ? process.env.EMAILUSER
+    : 'noreply@someserver.com',
+  emailPassword: process.env.EMAILPASS
+    ? process.env.EMAILPASS
+    : 'emailpassword',
 
   // IPFS settings.
   isCircuitRelay: process.env.ENABLE_CIRCUIT_RELAY ? true : false,
@@ -27,9 +33,10 @@ module.exports = {
   announceJsonLd: {
     '@context': 'https://schema.org/',
     '@type': 'WebAPI',
-    name: 'ipfs-service-provider',
-    description: 'This is a generic IPFS Serivice Provider that uses JSON RPC over IPFS to communicate with it. This instance has not been customized. Source code: https://github.com/Permissionless-Software-Foundation/ipfs-service-provider',
-    documentation: 'https://ipfs-service-provider.fullstack.cash/',
+    name: 'ipfs-bch-wallet-service',
+    description:
+      'IPFS service providing BCH blockchain access needed by a wallet.',
+    documentation: 'https://ipfs-bch-wallet-service.fullstack.cash/',
     provider: {
       '@type': 'Organization',
       name: 'Permissionless Software Foundation',

src/controllers/json-rpc/fulcrum/index.js

@@ -0,0 +1,167 @@
+/*
+  This is the JSON RPC router for the Fulcrum API
+*/
+
+// Public npm libraries
+const jsonrpc = require('jsonrpc-lite')
+const BCHJS = require('@psf/bch-js')
+
+// Local libraries
+// const UserLib = require('../../../use-cases/user')
+const Validators = require('../validators')
+const RateLimit = require('../rate-limit')
+
+class FulcrumRPC {
+  constructor (localConfig = {}) {
+    // Dependency Injection.
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating Fulcrum JSON RPC Controller.'
+      )
+    }
+    this.useCases = localConfig.useCases
+    if (!this.useCases) {
+      throw new Error(
+        'Instance of Use Cases library required when instantiating Fulcrum JSON RPC Controller.'
+      )
+    }
+
+    // Encapsulate dependencies
+    this.userLib = this.useCases.user
+    this.jsonrpc = jsonrpc
+    this.validators = new Validators(localConfig)
+    this.rateLimit = new RateLimit()
+    this.bchjs = new BCHJS()
+  }
+
+  // Top-level router for this library. All other methods in this class are for
+  // a specific endpoint. This method routes incoming calls to one of those
+  // methods.
+  async fulcrumRouter (rpcData) {
+    let endpoint = 'unknown'
+    try {
+      // console.log('fulcrumRouter rpcData: ', rpcData)
+
+      endpoint = rpcData.payload.params.endpoint
+      let user
+
+      // Route the call based on the value of the method property.
+      switch (endpoint) {
+        case 'transactions':
+          await this.rateLimit.limiter(rpcData.from)
+          return await this.transactions(rpcData)
+
+        // case 'getAllUsers':
+        //   await this.validators.ensureUser(rpcData)
+        //   await this.rateLimit.limiter(rpcData.from)
+        //   return await this.getAll(rpcData)
+        //
+        // case 'getUser':
+        //   user = await this.validators.ensureUser(rpcData)
+        //   await this.rateLimit.limiter(rpcData.from)
+        //   return await this.getUser(rpcData, user)
+        //
+        // case 'updateUser':
+        //   user = await this.validators.ensureTargetUserOrAdmin(rpcData)
+        //   await this.rateLimit.limiter(rpcData.from)
+        //   return await this.updateUser(rpcData, user)
+        //
+        // case 'deleteUser':
+        //   user = await this.validators.ensureTargetUserOrAdmin(rpcData)
+        //   await this.rateLimit.limiter(rpcData.from)
+        //   return await this.deleteUser(rpcData, user)
+      }
+    } catch (err) {
+      console.error('Error in FulcrumRPC/rpcRouter()')
+      // throw err
+
+      return {
+        success: false,
+        status: err.status || 500,
+        message: err.message,
+        endpoint
+      }
+    }
+  }
+
+  /**
+   * @api {JSON} /fulcrum Transactions
+   * @apiPermission public
+   * @apiName Transactions
+   * @apiGroup JSON Fulcrum
+   * @apiDescription This endpoint wraps the bchjs.Electrumx.transactions([]) function.
+   *
+   * @apiExample Example usage:
+   * {"jsonrpc":"2.0","id":"555","method":"fulcrum","params":{ "endpoint": "transactions", "addresses": ["bitcoincash:qrl2nlsaayk6ekxn80pq0ks32dya8xfclyktem2mqj"]}}
+   *
+   */
+  async transactions (rpcData) {
+    try {
+      // console.log('createUser rpcData: ', rpcData)
+
+      const addrs = rpcData.payload.params.addresses
+
+      const data = await this.bchjs.Electrumx.transactions(addrs)
+      // console.log(`data: ${JSON.stringify(data, null, 2)}`)
+
+      const retObj = data
+      retObj.status = 200
+
+      return retObj
+    } catch (err) {
+      // console.error('Error in createUser()')
+      // throw err
+
+      // Return an error response
+      return {
+        success: false,
+        status: 422,
+        message: err.message,
+        endpoint: 'transactions'
+      }
+    }
+  }
+
+  /**
+   * @api {JSON} /fulcrum Balance
+   * @apiPermission public
+   * @apiName Balance
+   * @apiGroup JSON Fulcrum
+   * @apiDescription This endpoint wraps the bchjs.Electrumx.balance([]) function.
+   *
+   * @apiExample Example usage:
+   * {"jsonrpc":"2.0","id":"555","method":"fulcrum","params":{ "endpoint": "balance", "addresses": ["bitcoincash:qrl2nlsaayk6ekxn80pq0ks32dya8xfclyktem2mqj"]}}
+   *
+   */
+  async balance (rpcData) {
+    try {
+      // console.log('createUser rpcData: ', rpcData)
+
+      const addrs = rpcData.payload.params.addresses
+
+      const data = await this.bchjs.Electrumx.balance(addrs)
+      // console.log(`data: ${JSON.stringify(data, null, 2)}`)
+
+      const retObj = data
+      retObj.status = 200
+
+      return retObj
+    } catch (err) {
+      // console.error('Error in createUser()')
+      // throw err
+
+      // Return an error response
+      return {
+        success: false,
+        status: 422,
+        message: err.message,
+        endpoint: 'balance'
+      }
+    }
+  }
+
+  // TODO create deleteUser()
+}
+
+module.exports = FulcrumRPC

src/controllers/json-rpc/index.js

@@ -10,6 +10,7 @@ const { wlogger } = require('../../adapters/wlogger')
 const UserController = require('./users')
 const AuthController = require('./auth')
 const AboutController = require('./about')
+const FulcrumController = require('./fulcrum')
 
 let _this
 
@@ -35,6 +36,7 @@ class JSONRPC {
     this.userController = new UserController(localConfig)
     this.authController = new AuthController(localConfig)
     this.aboutController = new AboutController()
+    this.fulcrumController = new FulcrumController(localConfig)
 
     _this = this
   }
@@ -80,6 +82,9 @@ class JSONRPC {
           break
         case 'about':
           retObj = await _this.aboutController.aboutRouter(parsedData)
+          break
+        case 'fulcrum':
+          retObj = await _this.fulcrumController.fulcrumRouter(parsedData)
       }
 
       // console.log('retObj: ', retObj)

src/controllers/json-rpc/rate-limit.js

@@ -14,7 +14,7 @@ class RateLimit {
     // Set default rate limit options.
     this.defaultOptions = {
       interval: { min: 1 },
-      max: 60,
+      max: 1000, // 1000 RPM while prototyping.
       onLimitReached: this.onLimitReached
     }
 

src/controllers/rest-api/fulcrum/controller.js

@@ -0,0 +1,122 @@
+/*
+  Controller for the /fulcrum REST API endpoints.
+*/
+
+const BCHJS = require('@psf/bch-js')
+
+let _this
+
+class FulcrumRESTController {
+  constructor (localConfig = {}) {
+    // Dependency Injection.
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating Fulcrum REST Controller.'
+      )
+    }
+    this.useCases = localConfig.useCases
+    if (!this.useCases) {
+      throw new Error(
+        'Instance of Use Cases library required when instantiating Fulcrum REST Controller.'
+      )
+    }
+
+    this.bchjs = new BCHJS()
+
+    _this = this
+  }
+
+  /**
+   * @api {post} /fulcrum/transactions Transactions
+   * @apiName Transactions
+   * @apiGroup REST Fulcrum
+   * @apiDescription This endpoint wraps the bchjs.Electrumx.transactions([]) function.
+   *
+   * @apiExample Example usage:
+   * curl -H "Content-Type: application/json" -X POST -d '{ "addresses": ["bitcoincash:qrl2nlsaayk6ekxn80pq0ks32dya8xfclyktem2mqj"] }' localhost:5001/fulcrum/transactions
+   *
+   * @apiSuccessExample {json} Success-Response:
+   *     HTTP/1.1 200 OK
+   *     {
+   *
+   *        success:true,
+   *        data: <data>
+   *     }
+   *
+   * @apiError UnprocessableEntity Missing required parameters
+   *
+   * @apiErrorExample {json} Error-Response:
+   *     HTTP/1.1 422 Unprocessable Entity
+   *     {
+   *       "status": 422,
+   *       "error": "Unprocessable Entity"
+   *     }
+   */
+  async transactions (ctx) {
+    try {
+      const addrs = ctx.request.body.addresses
+
+      const data = await _this.bchjs.Electrumx.transactions(addrs)
+      // console.log(`data: ${JSON.stringify(data, null, 2)}`)
+
+      ctx.body = data
+    } catch (err) {
+      _this.handleError(ctx, err)
+    }
+  }
+
+  /**
+   * @api {post} /fulcrum/balance Balance
+   * @apiName Balance
+   * @apiGroup REST Fulcrum
+   * @apiDescription This endpoint returns the balance in BCH for an address.
+   *
+   * @apiExample Example usage:
+   * curl -H "Content-Type: application/json" -X POST -d '{ "addresses": ["bitcoincash:qrl2nlsaayk6ekxn80pq0ks32dya8xfclyktem2mqj"] }' localhost:5001/fulcrum/balance
+   *
+   * @apiSuccessExample {json} Success-Response:
+   *     HTTP/1.1 200 OK
+   *     {
+   *        success:true,
+   *        data: <data>
+   *     }
+   *
+   * @apiError UnprocessableEntity Missing required parameters
+   *
+   * @apiErrorExample {json} Error-Response:
+   *     HTTP/1.1 422 Unprocessable Entity
+   *     {
+   *       "status": 422,
+   *       "error": "Unprocessable Entity"
+   *     }
+   */
+  async balance (ctx) {
+    try {
+      const addrs = ctx.request.body.addresses
+
+      const data = await _this.bchjs.Electrumx.balance(addrs)
+      // console.log(`data: ${JSON.stringify(data, null, 2)}`)
+
+      ctx.body = data
+    } catch (err) {
+      _this.handleError(ctx, err)
+    }
+  }
+
+  // DRY error handler
+  handleError (ctx, err) {
+    // If an HTTP status is specified by the buisiness logic, use that.
+    if (err.status) {
+      if (err.message) {
+        ctx.throw(err.status, err.message)
+      } else {
+        ctx.throw(err.status)
+      }
+    } else {
+      // By default use a 422 error if the HTTP status is not specified.
+      ctx.throw(422, err.message)
+    }
+  }
+}
+module.exports = FulcrumRESTController

src/controllers/rest-api/fulcrum/index.js

@@ -0,0 +1,56 @@
+/*
+  REST API library for /fulcrum route.
+*/
+
+// Public npm libraries.
+const Router = require('koa-router')
+
+// Local libraries.
+const FulcrumRESTController = require('./controller')
+
+class FulcrumRouter {
+  constructor (localConfig = {}) {
+    // Dependency Injection.
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating Fulcrum REST Controller.'
+      )
+    }
+    this.useCases = localConfig.useCases
+    if (!this.useCases) {
+      throw new Error(
+        'Instance of Use Cases library required when instantiating Fulcrum REST Controller.'
+      )
+    }
+
+    const dependencies = {
+      adapters: this.adapters,
+      useCases: this.useCases
+    }
+
+    // Encapsulate dependencies.
+    this.fulcrumRESTController = new FulcrumRESTController(dependencies)
+
+    // Instantiate the router and set the base route.
+    const baseUrl = '/fulcrum'
+    this.router = new Router({ prefix: baseUrl })
+  }
+
+  attach (app) {
+    if (!app) {
+      throw new Error(
+        'Must pass app object when attaching REST API controllers.'
+      )
+    }
+
+    // Define the routes and attach the controller.
+    this.router.post('/transactions', this.fulcrumRESTController.transactions)
+
+    // Attach the Controller routes to the Koa app.
+    app.use(this.router.routes())
+    app.use(this.router.allowedMethods())
+  }
+}
+
+module.exports = FulcrumRouter

src/controllers/rest-api/index.js

@@ -11,6 +11,7 @@ const AuthRESTController = require('./auth')
 const UserRouter = require('./users')
 const ContactRESTController = require('./contact')
 const LogsRESTController = require('./logs')
+const FulcrumRESTController = require('./fulcrum')
 
 class RESTControllers {
   constructor (localConfig = {}) {
@@ -52,6 +53,10 @@ class RESTControllers {
     // Attach the REST API Controllers associated with the /logs route
     const logsRESTController = new LogsRESTController(dependencies)
     logsRESTController.attach(app)
+
+    // Attach the REST API Controllers associated with the /fulcrum route
+    const fulcrumRESTController = new FulcrumRESTController(dependencies)
+    fulcrumRESTController.attach(app)
   }
 }
 

test/unit/controllers/json-rpc/fulcrum.json-rpc.controller.unit.js

@@ -0,0 +1,203 @@
+/*
+  Unit tests for the json-rpc/auth/index.js file.
+*/
+
+// Public npm libraries
+const jsonrpc = require('jsonrpc-lite')
+const sinon = require('sinon')
+const assert = require('chai').assert
+const { v4: uid } = require('uuid')
+
+// Set the environment variable to signal this is a test.
+process.env.SVC_ENV = 'test'
+
+// Local libraries
+const FulcrumRPC = require('../../../../src/controllers/json-rpc/fulcrum')
+const RateLimit = require('../../../../src/controllers/json-rpc/rate-limit')
+const adapters = require('../../mocks/adapters')
+const UseCasesMock = require('../../mocks/use-cases')
+
+describe('#FulcrumRPC', () => {
+  let uut
+  let sandbox
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox()
+
+    const useCases = new UseCasesMock()
+
+    uut = new FulcrumRPC({ adapters, useCases })
+    uut.rateLimit = new RateLimit({ max: 100 })
+  })
+
+  afterEach(() => sandbox.restore())
+
+  describe('#constructor', () => {
+    it('should throw an error if adapters are not passed in', () => {
+      try {
+        uut = new FulcrumRPC()
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Adapters library required when instantiating Fulcrum JSON RPC Controller.'
+        )
+      }
+    })
+
+    it('should throw an error if useCases are not passed in', () => {
+      try {
+        uut = new FulcrumRPC({ adapters })
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Use Cases library required when instantiating Fulcrum JSON RPC Controller.'
+        )
+      }
+    })
+  })
+
+  describe('#fulcrumRouter', () => {
+    it('should route to the transactions method', async () => {
+      // Mock dependencies
+      sandbox.stub(uut, 'transactions').resolves(true)
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const txCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'transactions'
+      })
+      const jsonStr = JSON.stringify(txCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+      rpcData.from = 'Origin request'
+
+      const result = await uut.fulcrumRouter(rpcData)
+
+      assert.equal(result, true)
+    })
+
+    it('should return 500 status on routing issue', async () => {
+      // Mock dependencies
+      sandbox.stub(uut, 'transactions').rejects(new Error('test error'))
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const txCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'transactions'
+      })
+      const jsonStr = JSON.stringify(txCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+      rpcData.from = 'Origin request'
+
+      const result = await uut.fulcrumRouter(rpcData)
+
+      assert.equal(result.success, false)
+      assert.equal(result.status, 500)
+      assert.equal(result.message, 'test error')
+      assert.equal(result.endpoint, 'transactions')
+    })
+  })
+
+  describe('#transactions', () => {
+    it('should return data from bchjs', async () => {
+      // Mock dependencies
+      sandbox
+        .stub(uut.bchjs.Electrumx, 'transactions')
+        .resolves({ success: true })
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const txCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'transactions',
+        addresses: 'testAddr'
+      })
+      const jsonStr = JSON.stringify(txCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+
+      const response = await uut.transactions(rpcData)
+      // console.log('response: ', response)
+
+      assert.equal(response.success, true)
+      assert.equal(response.status, 200)
+    })
+
+    it('should return an error for invalid address', async () => {
+      // Force an error
+      sandbox
+        .stub(uut.bchjs.Electrumx, 'transactions')
+        .rejects(new Error('Invalid address'))
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const txCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'transactions',
+        addresses: 'testAddr'
+      })
+      const jsonStr = JSON.stringify(txCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+
+      const response = await uut.transactions(rpcData)
+      // console.log('response: ', response)
+
+      assert.equal(response.success, false)
+      assert.equal(response.status, 422)
+      assert.equal(response.message, 'Invalid address')
+      assert.equal(response.endpoint, 'transactions')
+    })
+  })
+
+  describe('#balance', () => {
+    it('should return data from bchjs', async () => {
+      // Mock dependencies
+      sandbox.stub(uut.bchjs.Electrumx, 'balance').resolves({ success: true })
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const rpcCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'balance',
+        addresses: 'testAddr'
+      })
+      const jsonStr = JSON.stringify(rpcCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+
+      const response = await uut.balance(rpcData)
+      // console.log('response: ', response)
+
+      assert.equal(response.success, true)
+      assert.equal(response.status, 200)
+    })
+
+    it('should return an error for invalid address', async () => {
+      // Force an error
+      sandbox
+        .stub(uut.bchjs.Electrumx, 'balance')
+        .rejects(new Error('Invalid address'))
+
+      // Generate the parsed data that the main router would pass to this
+      // endpoint.
+      const id = uid()
+      const rpcCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'balance',
+        addresses: 'testAddr'
+      })
+      const jsonStr = JSON.stringify(rpcCall, null, 2)
+      const rpcData = jsonrpc.parse(jsonStr)
+
+      const response = await uut.balance(rpcData)
+      // console.log('response: ', response)
+
+      assert.equal(response.success, false)
+      assert.equal(response.status, 422)
+      assert.equal(response.message, 'Invalid address')
+      assert.equal(response.endpoint, 'balance')
+    })
+  })
+})

test/unit/controllers/json-rpc/json-rpc.controller.unit.js

@@ -179,5 +179,33 @@ describe('#JSON RPC', () => {
       assert.equal(obj.result.method, 'about')
       assert.equal(obj.id, id)
     })
+
+    it('should route to fulcrum handler', async () => {
+      const id = uid()
+      const userCall = jsonrpc.request(id, 'fulcrum', {
+        endpoint: 'transactions'
+      })
+      const jsonStr = JSON.stringify(userCall, null, 2)
+
+      // Mock the controller.
+      sandbox.stub(uut.fulcrumController, 'fulcrumRouter').resolves('true')
+
+      // Force ipfs-coord communication.
+      uut.ipfsCoord.ipfs = {
+        orbitdb: {
+          sendToDb: () => {}
+        }
+      }
+
+      const result = await uut.router(jsonStr, 'peerA')
+      // console.log(result)
+
+      const obj = JSON.parse(result.retStr)
+      // console.log('obj: ', obj)
+
+      assert.equal(obj.result.value, 'true')
+      assert.equal(obj.result.method, 'fulcrum')
+      assert.equal(obj.id, id)
+    })
   })
 })

test/unit/controllers/rest-api/fulcrum/fulcrum.rest.controller.unit.js

@@ -0,0 +1,160 @@
+/*
+  Unit tests for the REST API handler for the /users endpoints.
+*/
+
+// Public npm libraries
+const assert = require('chai').assert
+const sinon = require('sinon')
+
+// Local support libraries
+const adapters = require('../../../mocks/adapters')
+const UseCasesMock = require('../../../mocks/use-cases')
+// const app = require('../../../mocks/app-mock')
+
+const FulcrumRESTController = require('../../../../../src/controllers/rest-api/fulcrum/controller')
+let uut
+let sandbox
+let ctx
+
+const mockContext = require('../../../../unit/mocks/ctx-mock').context
+
+describe('#Fulcrum-REST-Router', () => {
+  // const testUser = {}
+
+  beforeEach(() => {
+    const useCases = new UseCasesMock()
+    uut = new FulcrumRESTController({ adapters, useCases })
+
+    sandbox = sinon.createSandbox()
+
+    // Mock the context object.
+    ctx = mockContext()
+  })
+
+  afterEach(() => sandbox.restore())
+
+  describe('#constructor', () => {
+    it('should throw an error if adapters are not passed in', () => {
+      try {
+        uut = new FulcrumRESTController()
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Adapters library required when instantiating Fulcrum REST Controller.'
+        )
+      }
+    })
+
+    it('should throw an error if useCases are not passed in', () => {
+      try {
+        uut = new FulcrumRESTController({ adapters })
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Use Cases library required when instantiating Fulcrum REST Controller.'
+        )
+      }
+    })
+  })
+
+  describe('#transactions', () => {
+    it('should return data from bchjs', async () => {
+      // Mock dependencies
+      sandbox
+        .stub(uut.bchjs.Electrumx, 'transactions')
+        .resolves({ success: true })
+
+      ctx.request.body = {
+        addresses: 'testAddr'
+      }
+
+      await uut.transactions(ctx)
+      // console.log('ctx.body: ', ctx.body)
+
+      assert.equal(ctx.body.success, true)
+    })
+
+    it('should catch and throw an error', async () => {
+      try {
+        // Force an error
+        sandbox
+          .stub(uut.bchjs.Electrumx, 'transactions')
+          .rejects(new Error('test error'))
+
+        ctx.request.body = {
+          addresses: 'testAddr'
+        }
+
+        await uut.transactions(ctx)
+      } catch (err) {
+        // console.log('err: ', err)
+        assert.include(err.message, 'test error')
+      }
+    })
+  })
+
+  describe('#balance', () => {
+    it('should return data from bchjs', async () => {
+      // Mock dependencies
+      sandbox.stub(uut.bchjs.Electrumx, 'balance').resolves({ success: true })
+
+      ctx.request.body = {
+        addresses: 'testAddr'
+      }
+
+      await uut.balance(ctx)
+      // console.log('ctx.body: ', ctx.body)
+
+      assert.equal(ctx.body.success, true)
+    })
+
+    it('should catch and throw an error', async () => {
+      try {
+        // Force an error
+        sandbox
+          .stub(uut.bchjs.Electrumx, 'balance')
+          .rejects(new Error('test error'))
+
+        ctx.request.body = {
+          addresses: 'testAddr'
+        }
+
+        await uut.balance(ctx)
+      } catch (err) {
+        // console.log('err: ', err)
+        assert.include(err.message, 'test error')
+      }
+    })
+  })
+
+  describe('#handleError', () => {
+    it('should pass an error message', () => {
+      try {
+        const err = {
+          status: 422,
+          message: 'Unprocessable Entity'
+        }
+
+        uut.handleError(ctx, err)
+      } catch (err) {
+        assert.include(err.message, 'Unprocessable Entity')
+      }
+    })
+
+    it('should still throw error if there is no message', () => {
+      try {
+        const err = {
+          status: 404
+        }
+
+        uut.handleError(ctx, err)
+      } catch (err) {
+        assert.include(err.message, 'Not Found')
+      }
+    })
+  })
+})

test/unit/controllers/rest-api/fulcrum/fulcrum.rest.router.unit.js

@@ -0,0 +1,78 @@
+/*
+  Unit tests for the REST API handler for the /fulcrum endpoints.
+*/
+
+// Public npm libraries
+const assert = require('chai').assert
+const sinon = require('sinon')
+
+// Local support libraries
+const adapters = require('../../../mocks/adapters')
+const UseCasesMock = require('../../../mocks/use-cases')
+// const app = require('../../../mocks/app-mock')
+
+const FulcrumRouter = require('../../../../../src/controllers/rest-api/fulcrum')
+let uut
+let sandbox
+// let ctx
+
+// const mockContext = require('../../../../unit/mocks/ctx-mock').context
+
+describe('#Fulcrum-REST-Router', () => {
+  // const testUser = {}
+
+  beforeEach(() => {
+    const useCases = new UseCasesMock()
+    uut = new FulcrumRouter({ adapters, useCases })
+
+    sandbox = sinon.createSandbox()
+
+    // Mock the context object.
+    // ctx = mockContext()
+  })
+
+  afterEach(() => sandbox.restore())
+
+  describe('#constructor', () => {
+    it('should throw an error if adapters are not passed in', () => {
+      try {
+        uut = new FulcrumRouter()
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Adapters library required when instantiating Fulcrum REST Controller.'
+        )
+      }
+    })
+
+    it('should throw an error if useCases are not passed in', () => {
+      try {
+        uut = new FulcrumRouter({ adapters })
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Instance of Use Cases library required when instantiating Fulcrum REST Controller.'
+        )
+      }
+    })
+  })
+
+  describe('#attach', () => {
+    it('should throw an error if app is not passed in.', () => {
+      try {
+        uut.attach()
+
+        assert.fail('Unexpected code path')
+      } catch (err) {
+        assert.include(
+          err.message,
+          'Must pass app object when attaching REST API controllers.'
+        )
+      }
+    })
+  })
+})