From 465b64cdc58e9a4077e87c57266e3fbdde567205 Mon Sep 17 00:00:00 2001
From: selankon <selankon@selankon.xyz>
Date: Mon, 15 Jul 2024 11:59:01 +0200
Subject: [PATCH] Implements txByIndex

---
 src/api/chain.ts       | 13 +++++++++++++
 test/api/chain.test.ts |  5 +++++
 2 files changed, 18 insertions(+)

diff --git a/src/api/chain.ts b/src/api/chain.ts
index d0a8b5ff..baea1e14 100644
--- a/src/api/chain.ts
+++ b/src/api/chain.ts
@@ -9,6 +9,7 @@ enum ChainAPIMethods {
   COSTS = '/chain/info/electionPriceFactors',
   CIRCUITS = '/chain/info/circuit',
   TX_INFO = '/chain/transactions/reference',
+  TX_INFO_BY_INDEX = '/chain/transactions/reference/index/{index}',
   TX_INFO_BLOCK = '/chain/transactions/{blockHeight}/{txIndex}',
   SUBMIT_TX = '/chain/transactions',
   TX_LIST = '/chain/transactions/page',
@@ -467,6 +468,18 @@ export abstract class ChainAPI extends API {
       .catch(this.isApiError);
   }
 
+  public static txByIndex(url: string, index: number): Promise<IChainTxReference> {
+    return axios
+      .get<IChainTxReference>(url + ChainAPIMethods.TX_INFO_BY_INDEX.replace('{index}', String(index)))
+      .then((response) => {
+        if (response.status === 204) {
+          throw new ErrTransactionNotFound();
+        }
+        return response.data;
+      })
+      .catch(this.isApiError);
+  }
+
   /**
    * Fetches information about a transaction by its containing block an index on the block.
    *
diff --git a/test/api/chain.test.ts b/test/api/chain.test.ts
index 860eb34c..1eebab24 100644
--- a/test/api/chain.test.ts
+++ b/test/api/chain.test.ts
@@ -13,4 +13,9 @@ describe('Chain API tests', () => {
       await ChainAPI.txInfo(URL, '0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF');
     }).rejects.toThrow(ErrTransactionNotFound);
   }, 5000);
+  it('should throw when asking for a non existent transaction by index', async () => {
+    await expect(async () => {
+      await ChainAPI.txByIndex(URL, 0);
+    }).rejects.toThrow(ErrTransactionNotFound);
+  }, 5000);
 });