diff --git a/package.json b/package.json
index 1305f9f..85e85e8 100644
--- a/package.json
+++ b/package.json
@@ -17,7 +17,7 @@
     "test": "npm run lint && npm run test-v3",
     "lint": "standard --env mocha --fix",
     "test-v3": "export NETWORK=mainnet && nyc --reporter=text mocha --timeout 60000 test/v3/",
-    "test:temp": "export NETWORK=mainnet && mocha --timeout 25000 test/v3/blockchain.js",
+    "test:temp": "export NETWORK=mainnet && mocha --timeout 25000 test/v3/encryption.js",
     "test:integration": "mocha test/v3/integration",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
     "coverage:report": "export NETWORK=mainnet && nyc --reporter=html mocha --timeout 25000 test/v3/",
diff --git a/src/routes/v3/encryption.js b/src/routes/v3/encryption.js
index 3f81fb1..c393598 100644
--- a/src/routes/v3/encryption.js
+++ b/src/routes/v3/encryption.js
@@ -120,7 +120,8 @@ class Encryption {
       const txHistory = balance.txids
       // console.log(`txHistory: ${JSON.stringify(txHistory, null, 2)}`)
 
-      if (txHistory.length === 0) {
+      // throw error if there is no transaction history.
+      if (!txHistory || txHistory.length === 0) {
         throw new Error('No transaction history.')
       }
 
diff --git a/test/v3/encryption.js b/test/v3/encryption.js
index 0a0c76c..578ceaa 100644
--- a/test/v3/encryption.js
+++ b/test/v3/encryption.js
@@ -77,10 +77,6 @@ describe('#Encryption Router', () => {
 
       // Mock the Insight URL for unit tests.
       if (process.env.TEST === 'unit') {
-        // sandbox.stub(blockbookRoute.axios, 'request').resolves({
-        //   data: mockData.mockBalance
-        // })
-
         sandbox
           .stub(encryptionRoute.blockbook, 'balanceFromBlockbook')
           .resolves(mockData.mockBalance)
@@ -96,7 +92,55 @@ describe('#Encryption Router', () => {
       assert.equal(result.success, true)
 
       assert.property(result, 'publicKey')
-      assert.equal(result.publicKey, '044eb40b025df18409f2a5197b010dd62a9e65d9a74e415e5b10367721a9c4baa7ebfee22d14b8ece1c9bd70c0d9e5e8b00b61b81b88a1b5ce6f24eac6b8a34b2c')
+      assert.equal(
+        result.publicKey,
+        '044eb40b025df18409f2a5197b010dd62a9e65d9a74e415e5b10367721a9c4baa7ebfee22d14b8ece1c9bd70c0d9e5e8b00b61b81b88a1b5ce6f24eac6b8a34b2c'
+      )
+    })
+
+    it('should return false for address with no tx history', async () => {
+      req.params.address =
+        'bitcoincash:qqwfpk04ecf69wuprj9yjys9rla5mk7rj5j8uthqel'
+
+      // Mock the Insight URL for unit tests.
+      if (process.env.TEST === 'unit') {
+        sandbox
+          .stub(encryptionRoute.blockbook, 'balanceFromBlockbook')
+          .resolves(mockData.mockNoTxHistory)
+      }
+
+      const result = await encryptionRoute.getPublicKey(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result, 'success')
+      assert.equal(result.success, false)
+
+      assert.property(result, 'error')
+      assert.include(result.error, 'No transaction history')
+    })
+
+    it('should return false for address with no send history', async () => {
+      req.params.address =
+        'bitcoincash:qq78nwj5x97yh6wtlfd27dtlwjuh70vkjc59h8tgtg'
+
+      // Mock the Insight URL for unit tests.
+      if (process.env.TEST === 'unit') {
+        sandbox
+          .stub(encryptionRoute.blockbook, 'balanceFromBlockbook')
+          .resolves(mockData.mockNoSendBalance)
+        sandbox
+          .stub(encryptionRoute.rawTransactions, 'getRawTransactionsFromNode')
+          .resolves(mockData.mockNoSendTx)
+      }
+
+      const result = await encryptionRoute.getPublicKey(req, res)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result, 'success')
+      assert.equal(result.success, false)
+
+      assert.property(result, 'publicKey')
+      assert.include(result.publicKey, 'not found')
     })
   })
 })
diff --git a/test/v3/mocks/encryption-mocks.js b/test/v3/mocks/encryption-mocks.js
index f1de453..79100a0 100644
--- a/test/v3/mocks/encryption-mocks.js
+++ b/test/v3/mocks/encryption-mocks.js
@@ -93,7 +93,87 @@ const mockTxDetails = {
   blocktime: 1545564654
 }
 
+const mockNoTxHistory = {
+  page: 1,
+  totalPages: 1,
+  itemsOnPage: 1000,
+  address: 'bitcoincash:qqwfpk04ecf69wuprj9yjys9rla5mk7rj5j8uthqel',
+  balance: '0',
+  totalReceived: '0',
+  totalSent: '0',
+  unconfirmedBalance: '0',
+  unconfirmedTxs: 0,
+  txs: 0
+}
+
+const mockNoSendBalance = {
+  page: 1,
+  totalPages: 1,
+  itemsOnPage: 1000,
+  address: 'bitcoincash:qq78nwj5x97yh6wtlfd27dtlwjuh70vkjc59h8tgtg',
+  balance: '0',
+  totalReceived: '0',
+  totalSent: '0',
+  unconfirmedBalance: '600',
+  unconfirmedTxs: 1,
+  txs: 0,
+  txids: [
+    'a3b62cd4f4c56ba52139179db14bffd4ab22a2e077f3c62bd5cf0541bfcaf023'
+  ]
+}
+
+const mockNoSendTx = {
+  txid: 'a3b62cd4f4c56ba52139179db14bffd4ab22a2e077f3c62bd5cf0541bfcaf023',
+  hash: 'a3b62cd4f4c56ba52139179db14bffd4ab22a2e077f3c62bd5cf0541bfcaf023',
+  version: 2,
+  size: 226,
+  locktime: 0,
+  vin: [
+    {
+      txid: '681cc1d392975a7e78cbd490b8a940d7eb029c554f2cee332e3a7119d77fb189',
+      vout: 1,
+      scriptSig: {
+        asm: '30450221008a7c86ce3a9f5765573440143a00631bb5afa9a58b24674a7fa794bb11ffffc30220397dd4c672c3e0dbe0c4eb6390b5727c5fdc3a42cf3ae275ac13b44d27bb234f[ALL|FORKID] 02bc9fc26ae2bd9a9a14e9baeda4b4fdd95a00bcbf375732c647488b3ce82a2fd7',
+        hex: '4830450221008a7c86ce3a9f5765573440143a00631bb5afa9a58b24674a7fa794bb11ffffc30220397dd4c672c3e0dbe0c4eb6390b5727c5fdc3a42cf3ae275ac13b44d27bb234f412102bc9fc26ae2bd9a9a14e9baeda4b4fdd95a00bcbf375732c647488b3ce82a2fd7'
+      },
+      sequence: 4294967295
+    }
+  ],
+  vout: [
+    {
+      value: 0.000006,
+      n: 0,
+      scriptPubKey: {
+        asm: 'OP_DUP OP_HASH160 3c79ba54317c4be9cbfa5aaf357f74b97f3d9696 OP_EQUALVERIFY OP_CHECKSIG',
+        hex: '76a9143c79ba54317c4be9cbfa5aaf357f74b97f3d969688ac',
+        reqSigs: 1,
+        type: 'pubkeyhash',
+        addresses: [
+          'bitcoincash:qq78nwj5x97yh6wtlfd27dtlwjuh70vkjc59h8tgtg'
+        ]
+      }
+    },
+    {
+      value: 0.00003664,
+      n: 1,
+      scriptPubKey: {
+        asm: 'OP_DUP OP_HASH160 58502a73888e0a386fc69b44850af4b2a86ac9a6 OP_EQUALVERIFY OP_CHECKSIG',
+        hex: '76a91458502a73888e0a386fc69b44850af4b2a86ac9a688ac',
+        reqSigs: 1,
+        type: 'pubkeyhash',
+        addresses: [
+          'bitcoincash:qpv9q2nn3z8q5wr0c6d5fpg27je2s6kf5cavp4ney0'
+        ]
+      }
+    }
+  ],
+  hex: '020000000189b17fd719713a2e33ee2c4f559c02ebd740a9b890d4cb787e5a9792d3c11c68010000006b4830450221008a7c86ce3a9f5765573440143a00631bb5afa9a58b24674a7fa794bb11ffffc30220397dd4c672c3e0dbe0c4eb6390b5727c5fdc3a42cf3ae275ac13b44d27bb234f412102bc9fc26ae2bd9a9a14e9baeda4b4fdd95a00bcbf375732c647488b3ce82a2fd7ffffffff0258020000000000001976a9143c79ba54317c4be9cbfa5aaf357f74b97f3d969688ac500e0000000000001976a91458502a73888e0a386fc69b44850af4b2a86ac9a688ac00000000'
+}
+
 module.exports = {
   mockBalance,
-  mockTxDetails
+  mockTxDetails,
+  mockNoTxHistory,
+  mockNoSendBalance,
+  mockNoSendTx
 }