cleanup and change sewit witness output to its own tx

.env.example

@@ -2,4 +2,5 @@ BITCOIN_RPC_URL=http://192.168.1.100
 BITCOIN_RPC_USER=
 BITCOIN_RPC_PASSWORD=
 BITCOIN_RPC_PORT=8332
-BITCOIN_RPC_TIMEOUT=10000
+BITCOIN_RPC_TIMEOUT=10000
+PORT=3333

LICENSE.txt

@@ -1,21 +1,674 @@
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+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

package-lock.json

@@ -22,6 +22,7 @@
         "class-transformer": "^0.5.1",
         "class-validator": "^0.14.0",
         "merkletreejs": "^0.3.10",
+        "promise-socket": "^7.0.0",
         "reflect-metadata": "^0.1.13",
         "rpc-bitcoin": "^2.0.0",
         "rxjs": "^7.2.0",
@@ -3962,6 +3963,16 @@
       "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
       "dev": true
     },
+    "node_modules/core-js": {
+      "version": "3.31.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.31.0.tgz",
+      "integrity": "sha512-NIp2TQSGfR6ba5aalZD+ZQ1fSxGhDo/s1w0nx3RYzf2pnJxt7YynxFlFScP6eV7+GZsKO95NSjGxyJsU3DZgeQ==",
+      "hasInstallScript": true,
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/core-js"
+      }
+    },
     "node_modules/core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -8265,12 +8276,36 @@
       "resolved": "https://registry.npmjs.org/process-warning/-/process-warning-2.2.0.tgz",
       "integrity": "sha512-/1WZ8+VQjR6avWOgHeEPd7SDQmFQ1B5mC1eRXsCm5TarlNmx/wCsa5GEaxGm05BORRtyG/Ex/3xq3TuRvq57qg=="
     },
+    "node_modules/promise-duplex": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-duplex/-/promise-duplex-6.0.0.tgz",
+      "integrity": "sha512-ZL7rquzjTFzInDBeWYcsT+qddolNvzigahk6MI6qLSbQvlyRRCJkU3JztgaVunzvkH28smRa2Qu/cY9RXtSkgA==",
+      "dependencies": {
+        "core-js": "^3.6.5",
+        "promise-readable": "^6.0.0",
+        "promise-writable": "^6.0.0"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/promise-inflight": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/promise-inflight/-/promise-inflight-1.0.1.tgz",
       "integrity": "sha512-6zWPyEOFaQBJYcGMHBKTKJ3u6TBsnMFOIZSa6ce1e/ZrrsOlnHRHbabMjLiBYKp+n44X9eUI6VUPaukCXHuG4g==",
       "optional": true
     },
+    "node_modules/promise-readable": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-readable/-/promise-readable-6.0.0.tgz",
+      "integrity": "sha512-5NxtmUswijvX5cAM0zPSy6yiCXH/eKBpiiBq6JfAUrmngMquMbzcBhF2qA+ocs4rYYKdvAfv3cOvZxADLtL1CA==",
+      "dependencies": {
+        "core-js": "^3.6.5"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/promise-retry": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/promise-retry/-/promise-retry-2.0.1.tgz",
@@ -8284,6 +8319,26 @@
         "node": ">=10"
       }
     },
+    "node_modules/promise-socket": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/promise-socket/-/promise-socket-7.0.0.tgz",
+      "integrity": "sha512-Oic9BrxmcHOPEnzKp2Js+ehFyvsbd0WxsE5khweCTHuRvdzbXjHUZmSDT6F9TW8SIkAJ0lCzoHjMYnb0WQJPiw==",
+      "dependencies": {
+        "promise-duplex": "^6.0.0",
+        "tslib": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
+    "node_modules/promise-writable": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-writable/-/promise-writable-6.0.0.tgz",
+      "integrity": "sha512-b81zre/itgJFS7dwWzIdKNVVqvLiUxYRS/wolUB0H1YY/tAaS146XGKa4Q/5wCbsnXLyn0MCeV6f8HHe4iUHLg==",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/prompts": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/prompts/-/prompts-2.4.2.tgz",
@@ -13439,6 +13494,11 @@
       "integrity": "sha512-LDx6oHrK+PhzLKJU9j5S7/Y3jM/mUHvD/DeI1WQmJn652iPC5Y4TBzC9l+5OMOXlyTTA+SmVUPm0HQUwpD5Jqw==",
       "dev": true
     },
+    "core-js": {
+      "version": "3.31.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.31.0.tgz",
+      "integrity": "sha512-NIp2TQSGfR6ba5aalZD+ZQ1fSxGhDo/s1w0nx3RYzf2pnJxt7YynxFlFScP6eV7+GZsKO95NSjGxyJsU3DZgeQ=="
+    },
     "core-util-is": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
@@ -16750,12 +16810,30 @@
       "resolved": "https://registry.npmjs.org/process-warning/-/process-warning-2.2.0.tgz",
       "integrity": "sha512-/1WZ8+VQjR6avWOgHeEPd7SDQmFQ1B5mC1eRXsCm5TarlNmx/wCsa5GEaxGm05BORRtyG/Ex/3xq3TuRvq57qg=="
     },
+    "promise-duplex": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-duplex/-/promise-duplex-6.0.0.tgz",
+      "integrity": "sha512-ZL7rquzjTFzInDBeWYcsT+qddolNvzigahk6MI6qLSbQvlyRRCJkU3JztgaVunzvkH28smRa2Qu/cY9RXtSkgA==",
+      "requires": {
+        "core-js": "^3.6.5",
+        "promise-readable": "^6.0.0",
+        "promise-writable": "^6.0.0"
+      }
+    },
     "promise-inflight": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/promise-inflight/-/promise-inflight-1.0.1.tgz",
       "integrity": "sha512-6zWPyEOFaQBJYcGMHBKTKJ3u6TBsnMFOIZSa6ce1e/ZrrsOlnHRHbabMjLiBYKp+n44X9eUI6VUPaukCXHuG4g==",
       "optional": true
     },
+    "promise-readable": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-readable/-/promise-readable-6.0.0.tgz",
+      "integrity": "sha512-5NxtmUswijvX5cAM0zPSy6yiCXH/eKBpiiBq6JfAUrmngMquMbzcBhF2qA+ocs4rYYKdvAfv3cOvZxADLtL1CA==",
+      "requires": {
+        "core-js": "^3.6.5"
+      }
+    },
     "promise-retry": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/promise-retry/-/promise-retry-2.0.1.tgz",
@@ -16766,6 +16844,20 @@
         "retry": "^0.12.0"
       }
     },
+    "promise-socket": {
+      "version": "7.0.0",
+      "resolved": "https://registry.npmjs.org/promise-socket/-/promise-socket-7.0.0.tgz",
+      "integrity": "sha512-Oic9BrxmcHOPEnzKp2Js+ehFyvsbd0WxsE5khweCTHuRvdzbXjHUZmSDT6F9TW8SIkAJ0lCzoHjMYnb0WQJPiw==",
+      "requires": {
+        "promise-duplex": "^6.0.0",
+        "tslib": "^2.0.1"
+      }
+    },
+    "promise-writable": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/promise-writable/-/promise-writable-6.0.0.tgz",
+      "integrity": "sha512-b81zre/itgJFS7dwWzIdKNVVqvLiUxYRS/wolUB0H1YY/tAaS146XGKa4Q/5wCbsnXLyn0MCeV6f8HHe4iUHLg=="
+    },
     "prompts": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/prompts/-/prompts-2.4.2.tgz",

package.json

@@ -33,6 +33,7 @@
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.0",
     "merkletreejs": "^0.3.10",
+    "promise-socket": "^7.0.0",
     "reflect-metadata": "^0.1.13",
     "rpc-bitcoin": "^2.0.0",
     "rxjs": "^7.2.0",

src/ORM/client-statistics/client-statistics.entity.ts

@@ -1,4 +1,4 @@
-import { Column, Entity, Index, PrimaryGeneratedColumn } from 'typeorm';
+import { Column, Entity, Index, PrimaryColumn } from 'typeorm';
 
 import { DateTimeTransformer } from '../utils/DateTimeTransformer';
 import { TrackedEntity } from '../utils/TrackedEntity.entity';
@@ -6,8 +6,8 @@ import { TrackedEntity } from '../utils/TrackedEntity.entity';
 @Entity()
 export class ClientStatisticsEntity extends TrackedEntity {
 
-    @PrimaryGeneratedColumn()
+    @PrimaryColumn({ length: 64, type: 'varchar' })
-    id: number;
+    submissionHash: string;
 
     @Column({ length: 62, type: 'varchar' })
     address: string;

src/main.ts

@@ -6,6 +6,12 @@ import { AppModule } from './app.module';
 
 async function bootstrap() {
 
+  if (process.env.PORT == null) {
+    console.error('It appears your environment is not configured, create and populate an .env file.');
+    return;
+  }
+
+
   const app = await NestFactory.create<NestFastifyApplication>(AppModule, new FastifyAdapter());
   app.setGlobalPrefix('api')
   app.useGlobalPipes(

src/models/MiningJob.ts

@@ -12,17 +12,18 @@ interface AddressObject {
 }
 export class MiningJob {
 
+    private coinbasePart1: string;
+    private coinbasePart2: string;
+
     private merkle_branch: string[]; // List of hashes, will be used for calculation of merkle root. This is not a list of all transactions, it only contains prepared hashes of steps of merkle tree algorithm.
 
     public jobId: string; // ID of the job. Use this ID while submitting share generated from this job.
-    public response: string;
     public block: bitcoinjs.Block = new bitcoinjs.Block();
     public networkDifficulty: number;
 
     constructor(id: string, payoutInformation: AddressObject[], public blockTemplate: IBlockTemplate, public clean_jobs: boolean) {
 
         this.jobId = id;
-        //this.target = blockTemplate.target;
         this.block.prevHash = this.convertToLittleEndian(blockTemplate.previousblockhash);
 
         this.block.version = blockTemplate.version;
@@ -51,7 +52,8 @@ export class MiningJob {
         //    32-byte - Commitment hash: Double-SHA256(witness root hash|witness reserved value)
         const commitmentHash = this.sha256(this.sha256(this.block.witnessCommit));
         //    39th byte onwards: Optional data with no consensus meaning
-        coinbaseTransaction.ins[0].script = bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([blockHeightScript, segwitMagicBits, commitmentHash, Buffer.from('00000000' + '00000000', 'hex')])]);
+        coinbaseTransaction.ins[0].script = bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([blockHeightScript, Buffer.from('00000000' + '00000000', 'hex')])]);
+        coinbaseTransaction.addOutput(bitcoinjs.script.compile([bitcoinjs.opcodes.OP_RETURN, Buffer.concat([segwitMagicBits, commitmentHash])]), 0);
 
         // get the non-witness coinbase tx
         //@ts-ignore
@@ -63,8 +65,8 @@ export class MiningJob {
 
         const coinbasePart1 = serializedCoinbaseTx.slice(0, partOneIndex);
         const coinbasePart2 = serializedCoinbaseTx.slice(partOneIndex);
-        const coinb1 = coinbasePart1.slice(0, coinbasePart1.length - 16);
+        this.coinbasePart1 = coinbasePart1.slice(0, coinbasePart1.length - 16);
-        const coinb2 = coinbasePart2;
+        this.coinbasePart2 = coinbasePart2;
 
 
         // Calculate merkle branch
@@ -75,18 +77,15 @@ export class MiningJob {
 
         this.block.transactions[0] = coinbaseTransaction;
 
-        this.constructResponse(coinb1, coinb2);
-
     }
 
-    public copyAndUpdateBlock(versionMaskString: number, nonce: number, extraNonce: string, extraNonce2: string, timestamp: number): bitcoinjs.Block {
+    public copyAndUpdateBlock(versionMask: number, nonce: number, extraNonce: string, extraNonce2: string, timestamp: number): bitcoinjs.Block {
 
         const testBlock = bitcoinjs.Block.fromBuffer(this.block.toBuffer());
 
         testBlock.nonce = nonce;
 
         // recompute version mask
-        const versionMask = versionMaskString;
         if (versionMask !== undefined && versionMask != 0) {
             testBlock.version = (testBlock.version ^ versionMask);
         }
@@ -131,8 +130,6 @@ export class MiningJob {
         // Set the version of the transaction
         coinbaseTransaction.version = 2;
 
-
-
         // Add the coinbase input (input with no previous output)
         coinbaseTransaction.addInput(Buffer.from('0000000000000000000000000000000000000000000000000000000000000000', 'hex'), 0xffffffff, 0xffffffff);
 
@@ -145,7 +142,7 @@ export class MiningJob {
             coinbaseTransaction.addOutput(this.getPaymentScript(recipientAddress.address), amount);
         })
 
-        //Add any remaining sats from the Math.floor 
+        //Add any remaining sats from the Math.floor
         coinbaseTransaction.outs[0].value += rewardBalance;
 
         const segwitWitnessReservedValue = Buffer.alloc(32, 0);
@@ -160,7 +157,7 @@ export class MiningJob {
         const addressInfo = getAddressInfo(address);
         switch (addressInfo.type) {
             case AddressType.p2wpkh: {
-                return bitcoinjs.payments.p2wpkh({ address, network: bitcoinjs.networks.testnet }).output;
+                return bitcoinjs.payments.p2wpkh({ address }).output;
             }
             case AddressType.p2pkh: {
                 return bitcoinjs.payments.p2pkh({ address }).output;
@@ -185,7 +182,7 @@ export class MiningJob {
     }
 
 
-    private constructResponse(coinb1: string, coinb2: string) {
+    public response(): string {
 
         const job = {
             id: null,
@@ -193,8 +190,8 @@ export class MiningJob {
             params: [
                 this.jobId,
                 this.swapEndianWords(this.block.prevHash).toString('hex'),
-                coinb1,
+                this.coinbasePart1,
-                coinb2,
+                this.coinbasePart2,
                 this.merkle_branch,
                 this.block.version.toString(16),
                 this.block.bits.toString(16),
@@ -203,7 +200,7 @@ export class MiningJob {
             ]
         };
 
-        this.response = JSON.stringify(job);
+        return JSON.stringify(job) + '\n';
     }
 
 

src/models/StratumV1Client.ts

@@ -3,6 +3,7 @@ import { plainToInstance } from 'class-transformer';
 import { validate, ValidatorOptions } from 'class-validator';
 import * as crypto from 'crypto';
 import { Socket } from 'net';
+import PromiseSocket from 'promise-socket';
 import { combineLatest, firstValueFrom, interval, startWith, takeUntil } from 'rxjs';
 
 import { ClientStatisticsService } from '../ORM/client-statistics/client-statistics.service';
@@ -11,7 +12,7 @@ import { ClientService } from '../ORM/client/client.service';
 import { BitcoinRpcService } from '../services/bitcoin-rpc.service';
 import { BlockTemplateService } from '../services/block-template.service';
 import { StratumV1JobsService } from '../services/stratum-v1-jobs.service';
-import { EasyUnsubscribe } from '../utils/AutoUnsubscribe';
+import { EasyUnsubscribe } from '../utils/EasyUnsubscribe';
 import { IBlockTemplate } from './bitcoin-rpc/IBlockTemplate';
 import { eRequestMethod } from './enums/eRequestMethod';
 import { eResponseMethod } from './enums/eResponseMethod';
@@ -25,8 +26,6 @@ import { SubscriptionMessage } from './stratum-messages/SubscriptionMessage';
 import { SuggestDifficulty } from './stratum-messages/SuggestDifficultyMessage';
 import { StratumV1ClientStatistics } from './StratumV1ClientStatistics';
 
-
-
 export class StratumV1Client extends EasyUnsubscribe {
 
     private clientSubscription: SubscriptionMessage;
@@ -43,7 +42,7 @@ export class StratumV1Client extends EasyUnsubscribe {
     public extraNonce: string;
 
     constructor(
-        public readonly socket: Socket,
+        public readonly promiseSocket: PromiseSocket<Socket>,
         private readonly stratumV1JobsService: StratumV1JobsService,
         private readonly blockTemplateService: BlockTemplateService,
         private readonly bitcoinRpcService: BitcoinRpcService,
@@ -57,7 +56,12 @@ export class StratumV1Client extends EasyUnsubscribe {
 
         console.log(`New client ID: : ${this.extraNonce}`);
 
-        this.socket.on('data', this.handleData.bind(this, this.socket));
+        this.promiseSocket.socket.on('data', (data: Buffer) => {
+            data.toString()
+                .split('\n')
+                .filter(m => m.length > 0)
+                .forEach(m => this.handleMessage(m))
+        });
 
     }
 
@@ -68,17 +72,8 @@ export class StratumV1Client extends EasyUnsubscribe {
         return hexString;
     }
 
-    private async handleData(socket: Socket, data: Buffer) {
-        const message = data.toString();
 
-        message.split('\n')
+    private async handleMessage(message: string) {
-            .filter(m => m.length > 0)
-            .forEach(this.handleMessage.bind(this, socket));
-
-    }
-
-
-    private async handleMessage(socket: Socket, message: string) {
         console.log('Received:', message);
 
         // Parse the message and check if it's the initial subscription message
@@ -87,7 +82,7 @@ export class StratumV1Client extends EasyUnsubscribe {
             parsedMessage = JSON.parse(message);
         } catch (e) {
             console.log(e);
-            this.socket.end();
+            this.promiseSocket.end();
         }
 
         switch (parsedMessage.method) {
@@ -107,18 +102,15 @@ export class StratumV1Client extends EasyUnsubscribe {
                 if (errors.length === 0) {
                     this.clientSubscription = subscriptionMessage;
 
-                    socket.write(JSON.stringify(this.clientSubscription.response(this.extraNonce)) + '\n');
+                    await this.promiseSocket.write(JSON.stringify(this.clientSubscription.response(this.extraNonce)) + '\n');
                 } else {
-
                     const err = new StratumErrorMessage(
                         subscriptionMessage.id,
                         eStratumErrorCode.OtherUnknown,
                         'Subscription error',
                         errors).response();
-
                     console.error(err);
-                    socket.write(err);
+                    await this.promiseSocket.write(err);
-
                 }
 
                 break;
@@ -140,9 +132,15 @@ export class StratumV1Client extends EasyUnsubscribe {
                 if (errors.length === 0) {
                     this.clientConfiguration = configurationMessage;
                     //const response = this.buildSubscriptionResponse(configurationMessage.id);
-                    socket.write(JSON.stringify(this.clientConfiguration.response()) + '\n');
+                    await this.promiseSocket.write(JSON.stringify(this.clientConfiguration.response()) + '\n');
                 } else {
-                    console.error(errors);
+                    const err = new StratumErrorMessage(
+                        configurationMessage.id,
+                        eStratumErrorCode.OtherUnknown,
+                        'Configuration error',
+                        errors).response();
+                    console.error(err);
+                    await this.promiseSocket.write(err);
                 }
 
                 break;
@@ -164,9 +162,15 @@ export class StratumV1Client extends EasyUnsubscribe {
                     this.clientAuthorization = authorizationMessage;
 
                     //const response = this.buildSubscriptionResponse(authorizationMessage.id);
-                    socket.write(JSON.stringify(this.clientAuthorization.response()) + '\n');
+                    await this.promiseSocket.write(JSON.stringify(this.clientAuthorization.response()) + '\n');
                 } else {
-                    console.error(errors);
+                    const err = new StratumErrorMessage(
+                        authorizationMessage.id,
+                        eStratumErrorCode.OtherUnknown,
+                        'Authorization error',
+                        errors).response();
+                    console.error(err);
+                    await this.promiseSocket.write(err);
                 }
 
                 break;
@@ -192,10 +196,16 @@ export class StratumV1Client extends EasyUnsubscribe {
 
                     this.clientSuggestedDifficulty = suggestDifficultyMessage;
                     this.sessionDifficulty = suggestDifficultyMessage.suggestedDifficulty;
-                    socket.write(JSON.stringify(this.clientSuggestedDifficulty.response(this.sessionDifficulty)) + '\n');
+                    await this.promiseSocket.write(JSON.stringify(this.clientSuggestedDifficulty.response(this.sessionDifficulty)) + '\n');
                     this.usedSuggestedDifficulty = true;
                 } else {
-                    console.error(errors);
+                    const err = new StratumErrorMessage(
+                        suggestDifficultyMessage.id,
+                        eStratumErrorCode.OtherUnknown,
+                        'Suggest difficulty error',
+                        errors).response();
+                    console.error(err);
+                    await this.promiseSocket.write(err);
                 }
                 break;
             }
@@ -214,11 +224,17 @@ export class StratumV1Client extends EasyUnsubscribe {
 
                 if (errors.length === 0) {
                     await this.handleMiningSubmission(miningSubmitMessage);
-                    socket.write(JSON.stringify(miningSubmitMessage.response()) + '\n');
+                    await this.promiseSocket.write(JSON.stringify(miningSubmitMessage.response()) + '\n');
 
 
                 } else {
-                    console.error(errors);
+                    const err = new StratumErrorMessage(
+                        miningSubmitMessage.id,
+                        eStratumErrorCode.OtherUnknown,
+                        'Suggest difficulty error',
+                        errors).response();
+                    console.error(err);
+                    await this.promiseSocket.write(err);
                 }
                 break;
             }
@@ -233,7 +249,7 @@ export class StratumV1Client extends EasyUnsubscribe {
             if (this.clientSuggestedDifficulty == null) {
                 console.log(`Setting difficulty to ${this.sessionDifficulty}`)
                 const setDifficulty = JSON.stringify(new SuggestDifficulty().response(this.sessionDifficulty));
-                this.socket.write(setDifficulty + '\n');
+                await this.promiseSocket.write(setDifficulty + '\n');
             }
 
             this.stratumInitialized = true;
@@ -264,7 +280,7 @@ export class StratumV1Client extends EasyUnsubscribe {
 
                     lastIntervalCount = interValCount;
 
-                    this.sendNewMiningJob(blockTemplate, clearJobs);
+                    await this.sendNewMiningJob(blockTemplate, clearJobs);
 
                     await this.checkDifficulty();
 
@@ -274,7 +290,7 @@ export class StratumV1Client extends EasyUnsubscribe {
         }
     }
 
-    private sendNewMiningJob(blockTemplate: IBlockTemplate, clearJobs: boolean) {
+    private async sendNewMiningJob(blockTemplate: IBlockTemplate, clearJobs: boolean) {
 
         // const payoutInformation = [
         //     { address: 'bc1q99n3pu025yyu0jlywpmwzalyhm36tg5u37w20d', percent: 1.8 },
@@ -288,10 +304,9 @@ export class StratumV1Client extends EasyUnsubscribe {
         const job = new MiningJob(this.stratumV1JobsService.getNextId(), payoutInformation, blockTemplate, clearJobs);
 
         this.stratumV1JobsService.addJob(job, clearJobs);
+        ;
 
-        const data = job.response + '\n';
+        await this.promiseSocket.write(job.response());
-
-        this.socket.write(data);
 
         console.log(`Sent new job to ${this.extraNonce}. (clearJobs: ${clearJobs})`)
 
@@ -301,9 +316,14 @@ export class StratumV1Client extends EasyUnsubscribe {
     private async handleMiningSubmission(submission: MiningSubmitMessage) {
 
         const job = this.stratumV1JobsService.getJobById(submission.jobId);
-        // a miner may submit a job that doesn't exist anymore if it was removed by a new block notification 
+        // a miner may submit a job that doesn't exist anymore if it was removed by a new block notification
         if (job == null) {
-            console.log('job not found')
+            const err = new StratumErrorMessage(
+                submission.id,
+                eStratumErrorCode.JobNotFound,
+                'Job not found').response();
+            console.error(err);
+            await this.promiseSocket.write(err);
             return;
         }
         const updatedJobBlock = job.copyAndUpdateBlock(
@@ -313,7 +333,7 @@ export class StratumV1Client extends EasyUnsubscribe {
             submission.extraNonce2,
             parseInt(submission.ntime, 16)
         );
-        const submissionDifficulty = this.calculateDifficulty(updatedJobBlock.toBuffer(true));
+        const { submissionDifficulty, submissionHash } = this.calculateDifficulty(updatedJobBlock.toBuffer(true));
 
         console.log(`DIFF: ${Math.round(submissionDifficulty)} of ${this.sessionDifficulty} from ${this.clientAuthorization.worker + '.' + this.extraNonce}`);
 
@@ -324,15 +344,30 @@ export class StratumV1Client extends EasyUnsubscribe {
                 const blockHex = updatedJobBlock.toHex(false);
                 this.bitcoinRpcService.SUBMIT_BLOCK(blockHex);
             }
+            try {
+                await this.statistics.addSubmission(this.entity, submissionHash, this.sessionDifficulty);
+            } catch (e) {
+                const err = new StratumErrorMessage(
+                    submission.id,
+                    eStratumErrorCode.DuplicateShare,
+                    'Duplicate share').response();
+                console.error(err);
+                await this.promiseSocket.write(err);
 
-            await this.statistics.addSubmission(this.entity, this.sessionDifficulty);
+                if (submissionDifficulty > this.entity.bestDifficulty) {
-            if (submissionDifficulty > this.entity.bestDifficulty) {
+                    await this.clientService.updateBestDifficulty(this.extraNonce, submissionDifficulty);
-                await this.clientService.updateBestDifficulty(this.extraNonce, submissionDifficulty);
+                    this.entity.bestDifficulty = submissionDifficulty;
-                this.entity.bestDifficulty = submissionDifficulty;
+                }
             }
 
         } else {
-            console.log(`Difficulty too low`);
+            const err = new StratumErrorMessage(
+                submission.id,
+                eStratumErrorCode.LowDifficultyShare,
+                'Difficulty too low').response();
+            console.error(err);
+            await this.promiseSocket.write(err);
+
         }
 
         await this.checkDifficulty();
@@ -355,19 +390,16 @@ export class StratumV1Client extends EasyUnsubscribe {
                 params: [targetDiff]
             }) + '\n';
 
-            this.socket.write(data);
+            await this.promiseSocket.write(data);
 
             // we need to clear the jobs so that the difficulty set takes effect. Otherwise the different miner implementations can cause issues
             const { blockTemplate } = await firstValueFrom(this.blockTemplateService.currentBlockTemplate$);
-            this.sendNewMiningJob(blockTemplate, true);
+            await this.sendNewMiningJob(blockTemplate, true);
-
-
-
 
         }
     }
 
-    public calculateDifficulty(header: Buffer): number {
+    public calculateDifficulty(header: Buffer): { submissionDifficulty: number, submissionHash: string } {
 
         const hashBuffer: Buffer = crypto.createHash('sha256').update(header).digest();
         const hashResult: Buffer = crypto.createHash('sha256').update(hashBuffer).digest();
@@ -375,7 +407,8 @@ export class StratumV1Client extends EasyUnsubscribe {
         let s64 = this.le256todouble(hashResult);
 
         const truediffone = Big('26959535291011309493156476344723991336010898738574164086137773096960');
-        return truediffone.div(s64.toString()).toNumber();
+        const difficulty = truediffone.div(s64.toString()).toNumber();
+        return { submissionDifficulty: difficulty, submissionHash: hashResult.toString('hex') };
     }
 
 

src/models/StratumV1ClientStatistics.ts

@@ -12,7 +12,7 @@ export class StratumV1ClientStatistics {
         this.submissionCacheStart = new Date();
     }
 
-    public async addSubmission(client: ClientEntity, targetDifficulty: number) {
+    public async addSubmission(client: ClientEntity, submissionHash: string, targetDifficulty: number) {
 
         if (this.submissionCache.length > CACHE_SIZE) {
             this.submissionCache.shift();
@@ -29,6 +29,7 @@ export class StratumV1ClientStatistics {
             address: client.address,
             clientName: client.clientName,
             sessionId: client.sessionId,
+            submissionHash
         });
 
     }
@@ -37,7 +38,7 @@ export class StratumV1ClientStatistics {
 
         // miner hasn't submitted shares in one minute
         if (this.submissionCache.length == 0 && (new Date().getTime() - this.submissionCacheStart.getTime()) / 1000 > 60) {
-            return this.blpo2(clientDifficulty >> 1);
+            return this.nearestPowerOfTwo(clientDifficulty >> 1);
         }
 
         if (this.submissionCache.length < CACHE_SIZE) {
@@ -55,15 +56,14 @@ export class StratumV1ClientStatistics {
         const targetDifficulty = difficultyPerSecond * TARGET_SUBMISSION_PER_SECOND;
 
         if (clientDifficulty << 1 < targetDifficulty || clientDifficulty >> 1 > targetDifficulty) {
-            return this.blpo2(targetDifficulty)
+            return this.nearestPowerOfTwo(targetDifficulty)
         }
 
         return null;
 
-
     }
 
-    private blpo2(val) {
+    private nearestPowerOfTwo(val) {
         let x = val | (val >> 1);
         x = x | (x >> 2);
         x = x | (x >> 4);
@@ -86,5 +86,4 @@ export class StratumV1ClientStatistics {
         return res;
     }
 
-
 }

src/models/stratum-messages/StratumErrorMessage.ts

@@ -8,7 +8,7 @@ export class StratumErrorMessage {
         private id: number = null,
         private errorCode: eStratumErrorCode,
         private errorMessage: string,
-        private validationErrors: ValidationError[]
+        private validationErrors: ValidationError[] = []
     ) {
 
     }

src/services/bitcoin-rpc.service.ts

@@ -6,8 +6,6 @@ import { BehaviorSubject, filter } from 'rxjs';
 import { IBlockTemplate } from '../models/bitcoin-rpc/IBlockTemplate';
 import { IMiningInfo } from '../models/bitcoin-rpc/IMiningInfo';
 
-
-
 @Injectable()
 export class BitcoinRpcService {
 
@@ -25,10 +23,8 @@ export class BitcoinRpcService {
 
         this.client = new RPCClient({ url, port, timeout, user, pass });
 
-
         console.log('Bitcoin RPC connected');
 
-
         // Maybe use ZeroMQ ?
         setInterval(async () => {
             const miningInfo = await this.getMiningInfo();
@@ -37,16 +33,12 @@ export class BitcoinRpcService {
                 this._newBlock$.next(miningInfo);
 
                 this.blockHeight = miningInfo.blocks;
-
             }
 
         }, 500);
-
     }
 
 
-
-
     public async getBlockTemplate(): Promise<IBlockTemplate> {
 
         const result: IBlockTemplate = await this.client.getblocktemplate({

src/services/stratum-v1.service.ts

@@ -1,5 +1,6 @@
 import { Injectable, OnModuleInit } from '@nestjs/common';
 import { Server, Socket } from 'net';
+import { PromiseSocket } from 'promise-socket';
 
 import { StratumV1Client } from '../models/StratumV1Client';
 import { ClientStatisticsService } from '../ORM/client-statistics/client-statistics.service';
@@ -12,8 +13,6 @@ import { StratumV1JobsService } from './stratum-v1-jobs.service';
 @Injectable()
 export class StratumV1Service implements OnModuleInit {
 
-  // public clients: StratumV1Client[] = [];
-
   constructor(
     private readonly bitcoinRpcService: BitcoinRpcService,
     private readonly blockTemplateService: BlockTemplateService,
@@ -29,38 +28,36 @@ export class StratumV1Service implements OnModuleInit {
     await this.clientService.deleteAll();
 
     this.startSocketServer();
-
   }
 
   private startSocketServer() {
-    new Server(async (socket: Socket) => {
+    new Server(async (s: Socket) => {
 
+      const promiseSocket = new PromiseSocket(s);
 
-      const client = new StratumV1Client(socket, new StratumV1JobsService(), this.blockTemplateService, this.bitcoinRpcService, this.clientService, this.clientStatisticsService);
+      const client = new StratumV1Client(promiseSocket, new StratumV1JobsService(), this.blockTemplateService, this.bitcoinRpcService, this.clientService, this.clientStatisticsService);
 
 
       const clientCount = await this.clientService.connectedClientCount();
 
-      //this.clients.push(client);
+      console.log(`New client connected: ${promiseSocket.socket.remoteAddress}, ${clientCount} total clients`);
 
-      console.log(`New client connected: ${socket.remoteAddress}, ${clientCount} total clients`);
+      promiseSocket.socket.on('end', async (error: Error) => {
-
-      socket.on('end', async () => {
         // Handle socket disconnection
         client.destroy();
         await this.clientService.delete(client.extraNonce);
 
         const clientCount = await this.clientService.connectedClientCount();
-        console.log(`Client disconnected: ${socket.remoteAddress}, ${clientCount} total clients`);
+        console.log(`Client disconnected: ${promiseSocket.socket.remoteAddress}, ${clientCount} total clients`);
       });
 
-      socket.on('error', async (error: Error) => {
+      promiseSocket.socket.on('error', async (error: Error) => {
 
         client.destroy();
         await this.clientService.delete(client.extraNonce);
         const clientCount = await this.clientService.connectedClientCount();
         console.error(`Socket error:`, error);
-        console.log(`Client disconnected: ${socket.remoteAddress}, ${clientCount} total clients`);
+        console.log(`Client disconnected: ${promiseSocket.socket.remoteAddress}, ${clientCount} total clients`);
 
       });
 
@@ -70,6 +67,4 @@ export class StratumV1Service implements OnModuleInit {
 
   }
 
-
-
 }