Incentives: Support heartbeat transaction

src/heartbeat.ts

@@ -0,0 +1,168 @@
+import { Address } from './encoding/address.js';
+import { Encodable, Schema } from './encoding/encoding.js';
+import {
+  AddressSchema,
+  Uint64Schema,
+  ByteArraySchema,
+  FixedLengthByteArraySchema,
+  NamedMapSchema,
+  allOmitEmpty,
+} from './encoding/schema/index.js';
+
+export class HeartbeatProof implements Encodable {
+  public static readonly encodingSchema = new NamedMapSchema(
+    allOmitEmpty([
+      {
+        key: 's', // Sig
+        valueSchema: new FixedLengthByteArraySchema(64),
+      },
+      {
+        key: 'p', // PK
+        valueSchema: new FixedLengthByteArraySchema(32),
+      },
+      {
+        key: 'p2', // PK2
+        valueSchema: new FixedLengthByteArraySchema(32),
+      },
+      {
+        key: 'p1s', // PK1Sig
+        valueSchema: new FixedLengthByteArraySchema(64),
+      },
+      {
+        key: 'p2s', // PK2Sig
+        valueSchema: new FixedLengthByteArraySchema(64),
+      },
+    ])
+  );
+
+  public sig: Uint8Array;
+
+  public pk: Uint8Array;
+
+  public pk2: Uint8Array;
+
+  public pk1Sig: Uint8Array;
+
+  public pk2Sig: Uint8Array;
+
+  public constructor(params: {
+    sig: Uint8Array;
+    pk: Uint8Array;
+    pk2: Uint8Array;
+    pk1Sig: Uint8Array;
+    pk2Sig: Uint8Array;
+  }) {
+    this.sig = params.sig;
+    this.pk = params.pk;
+    this.pk2 = params.pk2;
+    this.pk1Sig = params.pk1Sig;
+    this.pk2Sig = params.pk2Sig;
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  public getEncodingSchema(): Schema {
+    return HeartbeatProof.encodingSchema;
+  }
+
+  public toEncodingData(): Map<string, unknown> {
+    return new Map<string, unknown>([
+      ['s', this.sig],
+      ['p', this.pk],
+      ['p2', this.pk2],
+      ['p1s', this.pk1Sig],
+      ['p2s', this.pk2Sig],
+    ]);
+  }
+
+  public static fromEncodingData(data: unknown): HeartbeatProof {
+    if (!(data instanceof Map)) {
+      throw new Error(`Invalid decoded HeartbeatProof: ${data}`);
+    }
+    return new HeartbeatProof({
+      sig: data.get('s'),
+      pk: data.get('p'),
+      pk2: data.get('p2'),
+      pk1Sig: data.get('p1s'),
+      pk2Sig: data.get('p2s'),
+    });
+  }
+}
+
+export class Heartbeat implements Encodable {
+  public static readonly encodingSchema = new NamedMapSchema(
+    allOmitEmpty([
+      {
+        key: 'a', // HbAddress
+        valueSchema: new AddressSchema(),
+      },
+      {
+        key: 'prf', // HbProof
+        valueSchema: HeartbeatProof.encodingSchema,
+      },
+      {
+        key: 'sd', // HbSeed
+        valueSchema: new ByteArraySchema(),
+      },
+      {
+        key: 'vid', // HbVoteID
+        valueSchema: new FixedLengthByteArraySchema(32),
+      },
+      {
+        key: 'kd', // HbKeyDilution
+        valueSchema: new Uint64Schema(),
+      },
+    ])
+  );
+
+  public address: Address;
+
+  public proof: HeartbeatProof;
+
+  public seed: Uint8Array;
+
+  public voteID: Uint8Array;
+
+  public keyDilution: bigint;
+
+  public constructor(params: {
+    address: Address;
+    proof: HeartbeatProof;
+    seed: Uint8Array;
+    voteID: Uint8Array;
+    keyDilution: bigint;
+  }) {
+    this.address = params.address;
+    this.proof = params.proof;
+    this.seed = params.seed;
+    this.voteID = params.voteID;
+    this.keyDilution = params.keyDilution;
+  }
+
+  // eslint-disable-next-line class-methods-use-this
+  public getEncodingSchema(): Schema {
+    return Heartbeat.encodingSchema;
+  }
+
+  public toEncodingData(): Map<string, unknown> {
+    return new Map<string, unknown>([
+      ['a', this.address],
+      ['prf', this.proof.toEncodingData()],
+      ['sd', this.seed],
+      ['vid', this.voteID],
+      ['kd', this.keyDilution],
+    ]);
+  }
+
+  public static fromEncodingData(data: unknown): Heartbeat {
+    if (!(data instanceof Map)) {
+      throw new Error(`Invalid decoded Heartbeat: ${data}`);
+    }
+    return new Heartbeat({
+      address: data.get('a'),
+      proof: HeartbeatProof.fromEncodingData(data.get('prf')),
+      seed: data.get('sd'),
+      voteID: data.get('vid'),
+      keyDilution: data.get('kd'),
+    });
+  }
+}

src/transaction.ts

@@ -30,8 +30,10 @@ import {
   KeyRegistrationTransactionParams,
   ApplicationCallTransactionParams,
   StateProofTransactionParams,
+  HeartbeatTransactionParams,
 } from './types/transactions/base.js';
 import { StateProof, StateProofMessage } from './stateproof.js';
+import { Heartbeat, HeartbeatProof } from './heartbeat.js';
 import * as utils from './utils/utils.js';
 
 const ALGORAND_TRANSACTION_LENGTH = 52;
@@ -248,6 +250,14 @@ export interface StateProofTransactionFields {
   readonly message?: StateProofMessage;
 }
 
+export interface HeartbeatTransactionFields {
+  readonly address: Address;
+  readonly proof: HeartbeatProof;
+  readonly seed: Uint8Array;
+  readonly voteID: Uint8Array;
+  readonly keyDilution: bigint;
+}
+
 /**
  * Transaction enables construction of Algorand transactions
  * */
@@ -438,6 +448,8 @@ export class Transaction implements encoding.Encodable {
         key: 'spmsg',
         valueSchema: new OptionalSchema(StateProofMessage.encodingSchema),
       },
+      // Heartbeat
+      { key: 'hb', valueSchema: new OptionalSchema(Heartbeat.encodingSchema) },
     ])
   );
 
@@ -466,6 +478,7 @@ export class Transaction implements encoding.Encodable {
   public readonly assetFreeze?: AssetFreezeTransactionFields;
   public readonly applicationCall?: ApplicationTransactionFields;
   public readonly stateProof?: StateProofTransactionFields;
+  public readonly heartbeat?: HeartbeatTransactionFields;
 
   constructor(params: TransactionParams) {
     if (!isTransactionType(params.type)) {
@@ -506,6 +519,7 @@ export class Transaction implements encoding.Encodable {
     if (params.assetFreezeParams) fieldsPresent.push(TransactionType.afrz);
     if (params.appCallParams) fieldsPresent.push(TransactionType.appl);
     if (params.stateProofParams) fieldsPresent.push(TransactionType.stpf);
+    if (params.heartbeatParams) fieldsPresent.push(TransactionType.hb);
 
     if (fieldsPresent.length !== 1) {
       throw new Error(
@@ -701,6 +715,16 @@ export class Transaction implements encoding.Encodable {
       };
     }
 
+    if (params.heartbeatParams) {
+      this.heartbeat = new Heartbeat({
+        address: params.heartbeatParams.address,
+        proof: params.heartbeatParams.proof,
+        seed: params.heartbeatParams.seed,
+        voteID: params.heartbeatParams.voteID,
+        keyDilution: params.heartbeatParams.keyDilution,
+      });
+    }
+
     // Determine fee
     this.fee = utils.ensureUint64(params.suggestedParams.fee);
 
@@ -842,6 +866,18 @@ export class Transaction implements encoding.Encodable {
       return data;
     }
 
+    if (this.heartbeat) {
+      const heartbeat = new Heartbeat({
+        address: this.heartbeat.address,
+        proof: this.heartbeat.proof,
+        seed: this.heartbeat.seed,
+        voteID: this.heartbeat.voteID,
+        keyDilution: this.heartbeat.keyDilution,
+      });
+      data.set('hb', heartbeat.toEncodingData());
+      return data;
+    }
+
     throw new Error(`Unexpected transaction type: ${this.type}`);
   }
 
@@ -1006,6 +1042,16 @@ export class Transaction implements encoding.Encodable {
           : undefined,
       };
       params.stateProofParams = stateProofParams;
+    } else if (params.type === TransactionType.hb) {
+      const heartbeat = Heartbeat.fromEncodingData(data.get('hb'));
+      const heartbeatParams: HeartbeatTransactionParams = {
+        address: heartbeat.address,
+        proof: heartbeat.proof,
+        seed: heartbeat.seed,
+        voteID: heartbeat.voteID,
+        keyDilution: heartbeat.keyDilution,
+      };
+      params.heartbeatParams = heartbeatParams;
     } else {
       const exhaustiveCheck: never = params.type;
       throw new Error(`Unexpected transaction type: ${exhaustiveCheck}`);

src/types/transactions/base.ts

@@ -1,5 +1,6 @@
 import { Address } from '../../encoding/address.js';
 import { StateProof, StateProofMessage } from '../../stateproof.js';
+import { HeartbeatProof } from '../../heartbeat.js';
 
 /**
  * Enum for application transaction types.
@@ -38,6 +39,11 @@ export enum TransactionType {
    * State proof transaction
    */
   stpf = 'stpf',
+
+  /**
+   * Heartbeat transaction
+   */
+  hb = 'hb',
 }
 
 /**
@@ -53,7 +59,8 @@ export function isTransactionType(s: string): s is TransactionType {
     s === TransactionType.axfer ||
     s === TransactionType.afrz ||
     s === TransactionType.appl ||
-    s === TransactionType.stpf
+    s === TransactionType.stpf ||
+    s === TransactionType.hb
   );
 }
 
@@ -466,6 +473,36 @@ export interface StateProofTransactionParams {
   message?: StateProofMessage;
 }
 
+/**
+ * Contains heartbeat transaction parameters.
+ */
+export interface HeartbeatTransactionParams {
+  /*
+   * Account address this txn is proving onlineness for
+   */
+  address: Address;
+
+  /**
+   * Signature using HeartbeatAddress's partkey, thereby showing it is online.
+   */
+  proof: HeartbeatProof;
+
+  /**
+   * The block seed for the this transaction's firstValid block.
+   */
+  seed: Uint8Array;
+
+  /**
+   * Must match the hbAddress account's current VoteID
+   */
+  voteID: Uint8Array;
+
+  /**
+   * Must match hbAddress account's current KeyDilution.
+   */
+  keyDilution: bigint;
+}
+
 /**
  * A full list of all available transaction parameters
  *
@@ -540,4 +577,9 @@ export interface TransactionParams {
    * State proof transaction parameters. Only set if type is TransactionType.stpf
    */
   stateProofParams?: StateProofTransactionParams;
+
+  /**
+   * Heartbeat transaction parameters. Only set if type is TransactionType.hb
+   */
+  heartbeatParams?: HeartbeatTransactionParams;
 }

tests/5.Transaction.ts

@@ -1158,6 +1158,30 @@ describe('Sign', () => {
       assert.deepStrictEqual(reencRep, encRep);
     });
 
+    it('should correctly serialize and deserialize heartbeat transaction', () => {
+      const golden = algosdk.base64ToBytes(
+        'gqRsc2lngaFsxAYLMSAyAxKjdHhuhqJmdmqiZ2jEIP9SQzAGyec/v8omzEOW3/GIM+a7bvPaU5D/ohX7qjFtomhihaFhxCBsU6oqjVx2U65owbsX9/6N7/YCmul+O3liZ0fO2L75/KJrZGSjcHJmhaFwxCAM1TyIrIbgm+yPLT9so6VDI3rKl33t4c4RSGJv6G12eaNwMXPEQBETln14zJzQ1Mb/SNjmDNl0fyQ4DPBQZML8iTEbhqBj+YDAgpNSEduWj7OuVkCSQMq4N/Er/+2HfKUHu//spgOicDLEIB9c5n7WgG+5aOdjfBmuxH3z4TYiQzDVYKjBLhv4IkNfo3Ayc8RAeKpQ+o/GJyGCH0I4f9luN0i7BPXlMlaJAuXLX5Ng8DTN0vtZtztjqYfkwp1cVOYPu+Fce3aIdJHVoUDaJaMIDqFzxEBQN41y5zAZhYHQWf2wWF6CGboqQk6MxDcQ76zXHvVtzrAPUWXZDt4IB8Ha1z+54Hc6LmEoG090pk0IYs+jLN8HonNkxCCPVPjiD5O7V0c3P/SVsHmED7slwllta7c92WiKwnvgoqN2aWTEIHBy8sOi/V0YKXJw8VtW40MbqhtUyO9HC9m/haf84xiGomx2dKNzbmTEIDAp2wPDnojyy8tTgb3sMH++26D5+l7nHZmyRvzFfLsOpHR5cGWiaGI='
+      );
+
+      const decTxn = algosdk.decodeMsgpack(golden, algosdk.SignedTransaction);
+      const prepTxn = algosdk.SignedTransaction.encodingSchema.prepareMsgpack(
+        decTxn.toEncodingData()
+      );
+      assert.ok(prepTxn instanceof Map && prepTxn.has('txn'));
+
+      const reencRep = algosdk.encodeMsgpack(decTxn);
+      assert.deepStrictEqual(reencRep, golden);
+      const hbAddress =
+        'NRJ2UKUNLR3FHLTIYG5RP576RXX7MAU25F7DW6LCM5D45WF67H6EFQMWNM';
+
+      assert.deepStrictEqual(decTxn.txn.type, algosdk.TransactionType.hb);
+      assert.deepStrictEqual(
+        decTxn.txn.heartbeat?.address.toString(),
+        hbAddress
+      );
+      assert.deepStrictEqual(decTxn.txn.heartbeat?.keyDilution, 100n);
+    });
+
     it('reserializes correctly no genesis ID', () => {
       const expectedTxn = new algosdk.Transaction({
         type: algosdk.TransactionType.pay,