Add block/:hash/tx/:txid/summary endpoint

backend/src/api/bitcoin/bitcoin.routes.ts

@@ -42,6 +42,7 @@ class BitcoinRoutes {
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/:height', this.getBlocks.bind(this))
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash', this.getBlock)
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/summary', this.getStrippedBlockTransactions)
+      .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/tx/:txid/summary', this.getStrippedBlockTransaction)
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/audit-summary', this.getBlockAuditSummary)
       .get(config.MEMPOOL.API_URL_PREFIX + 'block/:hash/tx/:txid/audit', this.$getBlockTxAuditSummary)
       .get(config.MEMPOOL.API_URL_PREFIX + 'blocks/tip/height', this.getBlockTipHeight)
@@ -321,6 +322,20 @@ class BitcoinRoutes {
     }
   }
 
+  private async getStrippedBlockTransaction(req: Request, res: Response) {
+    try {
+      const transaction = await blocks.$getSingleTxFromSummary(req.params.hash, req.params.txid);
+      if (!transaction) {
+        handleError(req, res, 404, `transaction not found in summary`);
+        return;
+      }
+      res.setHeader('Expires', new Date(Date.now() + 1000 * 3600 * 24 * 30).toUTCString());
+      res.json(transaction);
+    } catch (e) {
+      res.status(500).send(e instanceof Error ? e.message : e);
+    }
+  }
+
   private async getBlock(req: Request, res: Response) {
     try {
       const block = await blocks.$getBlock(req.params.hash);

backend/src/api/blocks.ts

@@ -1224,6 +1224,11 @@ class Blocks {
     return summary.transactions;
   }
 
+  public async $getSingleTxFromSummary(hash: string, txid: string): Promise<TransactionClassified | null> {
+    const txs = await this.$getStrippedBlockTransactions(hash);
+    return txs.find(tx => tx.txid === txid) || null;
+  }
+
   /**
    * Get 15 blocks
    * 

frontend/src/app/services/api.service.ts

@@ -18,6 +18,7 @@ export class ApiService {
   private apiBasePath: string; // network path is /testnet, etc. or '' for mainnet
 
   private requestCache = new Map<string, { subject: BehaviorSubject<any>, expiry: number }>;
+  public blockSummaryLoaded: { [hash: string]: boolean } = {};
   public blockAuditLoaded: { [hash: string]: boolean } = {};
 
   constructor(
@@ -318,9 +319,14 @@ export class ApiService {
   }
 
   getStrippedBlockTransactions$(hash: string): Observable<TransactionStripped[]> {
+    this.setBlockSummaryLoaded(hash);
     return this.httpClient.get<TransactionStripped[]>(this.apiBaseUrl + this.apiBasePath + '/api/v1/block/' + hash + '/summary');
   }
 
+  getStrippedBlockTransaction$(hash: string, txid: string): Observable<TransactionStripped> {
+    return this.httpClient.get<TransactionStripped>(this.apiBaseUrl + this.apiBasePath + '/api/v1/block/' + hash + '/tx/' + txid + '/summary');
+  }
+
   getDifficultyAdjustments$(interval: string | undefined): Observable<any> {
     return this.httpClient.get<any[]>(
         this.apiBaseUrl + this.apiBasePath + `/api/v1/mining/difficulty-adjustments` +
@@ -567,4 +573,12 @@ export class ApiService {
   getBlockAuditLoaded(hash) {
     return this.blockAuditLoaded[hash];
   }
+
+  async setBlockSummaryLoaded(hash: string) {
+    this.blockSummaryLoaded[hash] = true;
+  }
+
+  getBlockSummaryLoaded(hash) {
+    return this.blockSummaryLoaded[hash];
+  }
 }