Merge pull request #139 from Permissionless-Software-Foundation/dh-getblock

feat(getBlock): Added getBlock endpoint to bch-js

src/blockchain.js

@@ -68,8 +68,8 @@ class Blockchain {
    * @apiName getBlock
    * @apiGroup Blockchain
    * @apiDescription
-   * If verbose is false, returns a string that is serialized, hex-encoded data for block 'hash'. If verbose is true, returns an Object with information about block hash.
-   *
+   * If verbose is 0, returns a string that is serialized, hex-encoded data for block 'hash'. If verbose is 1, returns an Object with information about block hash.
+   * If verbose is 2, returns an Object with information about block hash and information about tx.
    * @apiExample Example usage:
    * (async () => {
    * try {
@@ -80,7 +80,8 @@ class Blockchain {
    * }
    * })()
    *
-   * // { hash: '00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09',
+   * // {
+   * //  hash: '00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09',
    * //  confirmations: 528236,
    * //  size: 216,
    * //  height: 1000,
@@ -96,12 +97,21 @@ class Blockchain {
    * //  difficulty: 1,
    * //  chainwork: '000000000000000000000000000000000000000000000000000003e903e903e9',
    * //  previousblockhash: '0000000008e647742775a230787d66fdf92c46a48c896bfbc85cdc8acc67e87d',
-   * // nextblockhash: '00000000a2887344f8db859e372e7e4bc26b23b9de340f725afbf2edb265b4c6' }
+   * //  nextblockhash: '00000000a2887344f8db859e372e7e4bc26b23b9de340f725afbf2edb265b4c6'
+   * // }
    */
-  async getBlock (blockhash, verbose = true) {
+  async getBlock (blockhash, verbosity = 1) {
     try {
-      const response = await axios.get(
-        `${this.restURL}blockchain/getBlock/${blockhash}?verbose=${verbose}`,
+      // Input validation
+      if (!blockhash || typeof blockhash !== 'string') {
+        throw new Error('blockhash must be a string')
+      }
+      const response = await axios.post(
+        `${this.restURL}blockchain/getblock`,
+        {
+          blockhash,
+          verbosity
+        },
         _this.axiosOptions
       )
       return response.data

test/integration/blockchain.js

@@ -276,6 +276,43 @@ describe('#blockchain', () => {
       assert.equal(result, null)
     })
   })
+  describe('#getBlock', () => {
+    it('should get block information with default verbosity', async () => {
+      const blockhash =
+        '0000000000000000008e8d83cba6d45a9314bc2ef4538d4e0577c6bed8593536'
+      const result = await bchjs.Blockchain.getBlock(blockhash)
+
+      assert.hasAllKeys(result, [
+        'hash',
+        'confirmations',
+        'size',
+        'height',
+        'version',
+        'versionHex',
+        'merkleroot',
+        'tx',
+        'time',
+        'mediantime',
+        'nonce',
+        'bits',
+        'difficulty',
+        'chainwork',
+        'nTx',
+        'previousblockhash',
+        'nextblockhash'
+      ])
+      assert.isArray(result.tx)
+    })
+
+    it('should get block information with verbosity 0', async () => {
+      const blockhash =
+        '0000000000000000008e8d83cba6d45a9314bc2ef4538d4e0577c6bed8593536'
+      const verbosity = 0
+      const result = await bchjs.Blockchain.getBlock(blockhash, verbosity)
+
+      assert.isString(result)
+    })
+  })
 })
 
 function sleep (ms) {

test/unit/blockchain.js

@@ -61,16 +61,40 @@ describe('#Blockchain', () => {
 
     it('should get block by hash', done => {
       const resolved = new Promise(resolve => resolve({ data: data }))
-      sandbox.stub(axios, 'get').returns(resolved)
+      sandbox.stub(axios, 'post').returns(resolved)
 
-      bchjs.Blockchain.getBlock(
+      const blockhash =
         '00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09'
-      )
+      bchjs.Blockchain.getBlock(blockhash)
         .then(result => {
           assert.deepStrictEqual(data, result)
         })
         .then(done, done)
     })
+    it('should throw error if blockhash is not provided', async () => {
+      try {
+        await bchjs.Blockchain.getBlock()
+        assert2.fail('Unexpected result')
+      } catch (err) {
+        assert2.include(err.message, 'blockhash must be a string')
+      }
+    })
+    it('should handle response error', async () => {
+      try {
+        const error = new Error()
+        error.response = {
+          data: 'Test Error'
+        }
+        sandbox.stub(axios, 'post').throws(error)
+
+        const blockhash =
+          '00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09'
+        await bchjs.Blockchain.getBlock(blockhash)
+        assert2.fail('Unexpected result')
+      } catch (err) {
+        assert2.include(err, 'Test Error')
+      }
+    })
   })
 
   describe('#getBlockchainInfo', () => {
@@ -355,10 +379,7 @@ describe('#Blockchain', () => {
       try {
         await bchjs.Blockchain.getTxOut('badtxid')
       } catch (err) {
-        assert2.include(
-          err.message,
-          'txid needs to be a proper transaction ID'
-        )
+        assert2.include(err.message, 'txid needs to be a proper transaction ID')
       }
     })