Add new getBlockHeader rpc

packages/jellyfish-api-core/__tests__/category/blockchain.test.ts

@@ -1,7 +1,7 @@
 import { RegTestContainer, MasterNodeRegTestContainer } from '@defichain/testcontainers'
 import { ContainerAdapterClient } from '../container_adapter_client'
 import waitForExpect from 'wait-for-expect'
-import { BigNumber, Block, MempoolTx, Transaction, WalletFlag } from '../../src'
+import { BigNumber, Block, BlockHeader, MempoolTx, Transaction, WalletFlag } from '../../src'
 
 describe('non masternode', () => {
   const container = new RegTestContainer()
@@ -61,7 +61,7 @@ describe('masternode', () => {
     it('should getBlockchainInfo', async () => {
       await waitForExpect(async () => {
         const info = await client.blockchain.getBlockchainInfo()
-        await expect(info.blocks).toBeGreaterThan(1)
+        expect(info.blocks).toBeGreaterThan(1)
       })
 
       const info = await client.blockchain.getBlockchainInfo()
@@ -89,7 +89,7 @@ describe('masternode', () => {
     async function waitForBlockHash (height: number): Promise<string> {
       await waitForExpect(async () => {
         const info = await client.blockchain.getBlockchainInfo()
-        await expect(info.blocks).toBeGreaterThan(height)
+        expect(info.blocks).toBeGreaterThan(height)
       })
 
       return await client.blockchain.getBlockHash(height)
@@ -157,11 +157,57 @@ describe('masternode', () => {
     })
   })
 
+  describe('getBlockHeader', () => {
+    /**
+     * Wait for block hash to reach a certain height
+     */
+
+    async function waitForBlockHash (height: number): Promise<string> {
+      await waitForExpect(async () => {
+        const info = await client.blockchain.getBlockchainInfo()
+        expect(info.blocks).toBeGreaterThan(height)
+      })
+
+      return await client.blockchain.getBlockHash(height)
+    }
+
+    it('should getBlockHeader with verbosity true and return block with tx as hex', async () => {
+      const blockHash = await waitForBlockHash(1)
+      const blockHeader: BlockHeader = await client.blockchain.getBlockHeader(blockHash, true)
+
+      expect(blockHeader.hash.length).toBe(64)
+
+      expect(blockHeader.confirmations).toBeGreaterThanOrEqual(2)
+      expect(blockHeader.height).toBeGreaterThanOrEqual(1)
+
+      expect(blockHeader.version).toBeGreaterThanOrEqual(536870912)
+      expect(blockHeader.versionHex).toStrictEqual('20000000')
+      expect(blockHeader.merkleroot.length).toBe(64)
+
+      expect(blockHeader.time).toBeGreaterThan(1)
+      expect(blockHeader.mediantime).toBeGreaterThan(1)
+
+      expect(blockHeader.bits).toStrictEqual('207fffff')
+      expect(blockHeader.difficulty).toBeGreaterThan(0)
+
+      expect(blockHeader.chainwork.length).toBe(64)
+      expect(blockHeader.nTx).toBeGreaterThanOrEqual(1)
+      expect(blockHeader.previousblockhash.length).toBe(64)
+      expect(blockHeader.nextblockhash.length).toBe(64)
+    })
+
+    it('should getBlockHeader with verbosity false and return just a string that is serialized, hex-encoded data for block', async () => {
+      const blockHash = await waitForBlockHash(1)
+      const hash: string = await client.blockchain.getBlockHeader(blockHash, false)
+      expect(hash).not.toBeNull()
+    })
+  })
+
   describe('getBlockHash', () => {
     it('should getBlockHash', async () => {
       await waitForExpect(async () => {
         const info = await client.blockchain.getBlockchainInfo()
-        await expect(info.blocks).toBeGreaterThan(1)
+        expect(info.blocks).toBeGreaterThan(1)
       })
 
       const blockHash: string = await client.blockchain.getBlockHash(1)
@@ -174,7 +220,7 @@ describe('masternode', () => {
     it('should getBlockCount', async () => {
       await waitForExpect(async () => {
         const info = await client.blockchain.getBlockchainInfo()
-        await expect(info.blocks).toBeGreaterThan(1)
+        expect(info.blocks).toBeGreaterThan(1)
       })
 
       const blockCount: number = await client.blockchain.getBlockCount()

packages/jellyfish-api-core/src/category/blockchain.ts

@@ -73,6 +73,30 @@ export class Blockchain {
     return await this.client.call('getblock', [hash, verbosity], 'number')
   }
 
+  /**
+   * Get block header data with particular header hash.
+   * Returns an Object with information about block header.
+   *
+   * @param {string} hash of the block
+   * @param {boolean} verbosity true
+   * @return {Promise<BlockHeader>}
+   */
+  getBlockHeader (hash: string, verbosity: true): Promise<BlockHeader>
+
+  /**
+   * Get block header data with particular header hash.
+   * Returns an Object with information about block header.
+   *
+   * @param {string} hash of the block
+   * @param {boolean} verbosity false
+   * @return {Promise<string>}
+   */
+  getBlockHeader (hash: string, verbosity: false): Promise<string>
+
+  async getBlockHeader (hash: string, verbosity: boolean): Promise<string | BlockHeader> {
+    return await this.client.call('getblockheader', [hash, verbosity], 'number')
+  }
+
   /**
     * Get details of unspent transaction output (UTXO).
     *
@@ -167,6 +191,23 @@ export interface Block<T> {
   nextblockhash: string
 }
 
+export interface BlockHeader {
+  hash: string
+  confirmations: number
+  height: number
+  version: number
+  versionHex: string
+  merkleroot: string
+  time: number
+  mediantime: number
+  bits: string
+  difficulty: number
+  chainwork: string
+  nTx: number
+  previousblockhash: string
+  nextblockhash: string
+}
+
 export interface Transaction {
   txid: string
   hash: string

website/docs/jellyfish/api/blockchain.md

@@ -121,6 +121,35 @@ interface Vout {
 }
 ```
 
+## getBlockHeader
+
+Get block header data with particular header hash.
+
+```ts title="client.blockchain.getBlockHeader()"
+interface blockchain {
+  getBlockHeader (hash: string, verbosity: true): Promise<BlockHeader>
+  getBlockHeader (hash: string, verbosity: false): Promise<string>
+
+}
+
+interface BlockHeader {
+  hash: string
+  confirmations: number
+  height: number
+  version: number
+  versionHex: string
+  merkleroot: string
+  time: number
+  mediantime: number
+  bits: string
+  difficulty: number
+  chainwork: string
+  nTx: number
+  previousblockhash: string
+  nextblockhash: string
+}
+```
+
 ## getBlockHash
 
 Get a hash of block in best-block-chain at height provided.