From 86c877c8e968c45fad740d44682615b26526eac8 Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Sun, 26 Sep 2021 22:18:44 +0400
Subject: [PATCH] Adding POST /tx API to bitcoind mode

fixes #777
---
 .../src/api/bitcoin/bitcoin-api-abstract-factory.ts  |  1 +
 backend/src/api/bitcoin/bitcoin-api.ts               |  4 ++++
 backend/src/api/bitcoin/esplora-api.ts               |  4 ++++
 backend/src/index.ts                                 |  1 +
 backend/src/routes.ts                                | 12 ++++++++++++
 5 files changed, 22 insertions(+)

diff --git a/backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts b/backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts
index 72c7150cc..5201d47a5 100644
--- a/backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts
+++ b/backend/src/api/bitcoin/bitcoin-api-abstract-factory.ts
@@ -11,6 +11,7 @@ export interface AbstractBitcoinApi {
   $getAddress(address: string): Promise<IEsploraApi.Address>;
   $getAddressTransactions(address: string, lastSeenTxId: string): Promise<IEsploraApi.Transaction[]>;
   $getAddressPrefix(prefix: string): string[];
+  $sendRawTransaction(rawTransaction: string): Promise<string>;
 }
 export interface BitcoinRpcCredentials {
   host: string;
diff --git a/backend/src/api/bitcoin/bitcoin-api.ts b/backend/src/api/bitcoin/bitcoin-api.ts
index 4ad5d5cd5..887a8c2ce 100644
--- a/backend/src/api/bitcoin/bitcoin-api.ts
+++ b/backend/src/api/bitcoin/bitcoin-api.ts
@@ -98,6 +98,10 @@ class BitcoinApi implements AbstractBitcoinApi {
     return found;
   }
 
+  $sendRawTransaction(rawTransaction: string): Promise<string> {
+    return this.bitcoindClient.sendRawTransaction(rawTransaction);
+  }
+
   protected async $convertTransaction(transaction: IBitcoinApi.Transaction, addPrevout: boolean): Promise<IEsploraApi.Transaction> {
     let esploraTransaction: IEsploraApi.Transaction = {
       txid: transaction.txid,
diff --git a/backend/src/api/bitcoin/esplora-api.ts b/backend/src/api/bitcoin/esplora-api.ts
index 86d4179ad..142815c02 100644
--- a/backend/src/api/bitcoin/esplora-api.ts
+++ b/backend/src/api/bitcoin/esplora-api.ts
@@ -56,6 +56,10 @@ class ElectrsApi implements AbstractBitcoinApi {
   $getAddressPrefix(prefix: string): string[] {
     throw new Error('Method not implemented.');
   }
+
+  $sendRawTransaction(rawTransaction: string): Promise<string> {
+    throw new Error('Method not implemented.');
+  }
 }
 
 export default ElectrsApi;
diff --git a/backend/src/index.ts b/backend/src/index.ts
index cfca7cc65..e65a18ab6 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -246,6 +246,7 @@ class Server {
         .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/txids', routes.getMempoolTxIds)
         .get(config.MEMPOOL.API_URL_PREFIX + 'mempool/recent', routes.getRecentMempoolTransactions)
         .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId', routes.getTransaction)
+        .post(config.MEMPOOL.API_URL_PREFIX + 'tx', routes.$postTransaction)
         .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/hex', routes.getRawTransaction)
         .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/status', routes.getTransactionStatus)
         .get(config.MEMPOOL.API_URL_PREFIX + 'tx/:txId/outspends', routes.getTransactionOutspends)
diff --git a/backend/src/routes.ts b/backend/src/routes.ts
index 8db3e4b89..b1f9a2b15 100644
--- a/backend/src/routes.ts
+++ b/backend/src/routes.ts
@@ -764,6 +764,18 @@ class Routes {
       res.status(500).send(e instanceof Error ? e.message : e);
     }
   }
+
+  public async $postTransaction(req: Request, res: Response) {
+    res.setHeader('content-type', 'text/plain');
+    try {
+      const rawtx = Object.keys(req.body)[0];
+      const txIdResult = await bitcoinApi.$sendRawTransaction(rawtx);
+      res.send(txIdResult);
+    } catch (e: any) {
+      res.status(400).send(e.message && e.code ? 'sendrawtransaction RPC error: ' + JSON.stringify({ code: e.code, message: e.message })
+        : (e.message || 'Error'));
+    }
+  }
 }
 
 export default new Routes();