feat(rawtransactions): Adding full node raw transaction endpoints

src/adapters/full-node-rpc.js

@@ -113,12 +113,8 @@ class FullNodeRPCAdapter {
     }
   }
 
-  validateArraySize (length, options = {}) {
-    const { isProUser = false } = options
-    const freemiumLimit = Number(this.config.fullNode?.freemiumArrayLimit || 20)
-    const proLimit = Number(this.config.fullNode?.proArrayLimit || freemiumLimit)
-
-    const limit = isProUser ? proLimit : freemiumLimit
+  validateArraySize (length) {
+    const limit = 20
     return length <= limit
   }
 

src/controllers/rest-api/full-node/blockchain/controller.js

@@ -155,7 +155,7 @@ class BlockchainRESTController {
         })
       }
 
-      if (!this.adapters.fullNode.validateArraySize(hashes.length, { isProUser: Boolean(req.locals?.proLimit) })) {
+      if (!this.adapters.fullNode.validateArraySize(hashes.length)) {
         return res.status(400).json({ error: 'Array too large.' })
       }
 
@@ -238,7 +238,7 @@ class BlockchainRESTController {
         })
       }
 
-      if (!this.adapters.fullNode.validateArraySize(txids.length, { isProUser: Boolean(req.locals?.proLimit) })) {
+      if (!this.adapters.fullNode.validateArraySize(txids.length)) {
         return res.status(400).json({ error: 'Array too large.' })
       }
 
@@ -415,7 +415,7 @@ class BlockchainRESTController {
         })
       }
 
-      if (!this.adapters.fullNode.validateArraySize(txids.length, { isProUser: Boolean(req.locals?.proLimit) })) {
+      if (!this.adapters.fullNode.validateArraySize(txids.length)) {
         return res.status(400).json({ error: 'Array too large.' })
       }
 
@@ -470,7 +470,7 @@ class BlockchainRESTController {
         })
       }
 
-      if (!this.adapters.fullNode.validateArraySize(proofs.length, { isProUser: Boolean(req.locals?.proLimit) })) {
+      if (!this.adapters.fullNode.validateArraySize(proofs.length)) {
         return res.status(400).json({ error: 'Array too large.' })
       }
 

src/controllers/rest-api/full-node/rawtransactions/controller.js

@@ -0,0 +1,333 @@
+/*
+  REST API Controller for the /full-node/rawtransactions routes.
+*/
+
+import wlogger from '../../../../adapters/wlogger.js'
+
+class RawTransactionsRESTController {
+  constructor (localConfig = {}) {
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating RawTransactions REST Controller.'
+      )
+    }
+
+    this.useCases = localConfig.useCases
+    if (!this.useCases || !this.useCases.rawtransactions) {
+      throw new Error(
+        'Instance of RawTransactions use cases required when instantiating RawTransactions REST Controller.'
+      )
+    }
+
+    this.rawtransactionsUseCases = this.useCases.rawtransactions
+
+    // Bind functions
+    this.root = this.root.bind(this)
+    this.decodeRawTransactionSingle = this.decodeRawTransactionSingle.bind(this)
+    this.decodeRawTransactionBulk = this.decodeRawTransactionBulk.bind(this)
+    this.decodeScriptSingle = this.decodeScriptSingle.bind(this)
+    this.decodeScriptBulk = this.decodeScriptBulk.bind(this)
+    this.getRawTransactionSingle = this.getRawTransactionSingle.bind(this)
+    this.getRawTransactionBulk = this.getRawTransactionBulk.bind(this)
+    this.sendRawTransactionSingle = this.sendRawTransactionSingle.bind(this)
+    this.sendRawTransactionBulk = this.sendRawTransactionBulk.bind(this)
+    this.handleError = this.handleError.bind(this)
+  }
+
+  /**
+   * @api {get} /v6/full-node/rawtransactions/ Service status
+   * @apiName RawTransactionsRoot
+   * @apiGroup RawTransactions
+   *
+   * @apiDescription Returns the status of the rawtransactions service.
+   *
+   * @apiSuccess {String} status Service identifier
+   */
+  async root (req, res) {
+    return res.status(200).json({ status: 'rawtransactions' })
+  }
+
+  /**
+   * @api {get} /v6/full-node/rawtransactions/decodeRawTransaction/:hex Decode Single Raw Transaction
+   * @apiName DecodeSingleRawTransaction
+   * @apiGroup RawTransactions
+   * @apiDescription Return a JSON object representing the serialized, hex-encoded transaction.
+   *
+   * @apiParam {String} hex Hex-encoded transaction
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v6/full-node/rawtransactions/decodeRawTransaction/02000000010e991f7ccec410f27d333f737f149b5d3be6728687da81072e638aed0063a176010000006b483045022100cd20443b0af090053450bc4ab00d563d4ac5955bb36e0135b00b8a96a19f233302205047f2c70a08c6ef4b76f2d198b33a31d17edfaa7e1e9e865894da0d396009354121024d4e7f522f67105b7bf5f9dbe557e7b2244613fdfcd6fe09304f93877328f6beffffffff02a0860100000000001976a9140ee020c07f39526ac5505c54fa1ab98490979b8388acb5f0f70b000000001976a9143a9b2b0c12fe722fcf653b6ef5dcc38732d6ff5188ac00000000" -H "accept: application/json"
+   */
+  async decodeRawTransactionSingle (req, res) {
+    try {
+      const hex = req.params.hex
+
+      if (!hex || hex === '') {
+        return res.status(400).json({ error: 'hex can not be empty' })
+      }
+
+      const result = await this.rawtransactionsUseCases.decodeRawTransaction({ hex })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {post} /v6/full-node/rawtransactions/decodeRawTransaction Decode Bulk Raw Transactions
+   * @apiName DecodeBulkRawTransactions
+   * @apiGroup RawTransactions
+   * @apiDescription Return bulk hex encoded transaction.
+   *
+   * @apiParam {String[]} hexes Array of hex-encoded transactions
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v6/full-node/rawtransactions/decodeRawTransaction" -H "accept: application/json" -H "Content-Type: application/json" -d '{"hexes":["01000000013ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a000000006a4730440220540986d1c58d6e76f8f05501c520c38ce55393d0ed7ed3c3a82c69af04221232022058ea43ed6c05fec0eccce749a63332ed4525460105346f11108b9c26df93cd72012103083dfc5a0254613941ddc91af39ff90cd711cdcde03a87b144b883b524660c39ffffffff01807c814a000000001976a914d7e7c4e0b70eaa67ceff9d2823d1bbb9f6df9a5188ac00000000"]}'
+   */
+  async decodeRawTransactionBulk (req, res) {
+    try {
+      const hexes = req.body.hexes
+
+      if (!Array.isArray(hexes)) {
+        return res.status(400).json({ error: 'hexes must be an array' })
+      }
+
+      if (!this.adapters.fullNode.validateArraySize(hexes.length)) {
+        return res.status(400).json({ error: 'Array too large.' })
+      }
+
+      // Validate each element in the array
+      for (const hex of hexes) {
+        if (!hex || hex === '') {
+          return res.status(400).json({ error: 'Encountered empty hex' })
+        }
+      }
+
+      const result = await this.rawtransactionsUseCases.decodeRawTransactions({ hexes })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {get} /v6/full-node/rawtransactions/decodeScript/:hex Decode Single Script
+   * @apiName DecodeSingleScript
+   * @apiGroup RawTransactions
+   * @apiDescription Decode a hex-encoded script.
+   *
+   * @apiParam {String} hex Hex-encoded script
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v6/full-node/rawtransactions/decodeScript/4830450221009a51e00ec3524a7389592bc27bea4af5104a59510f5f0cfafa64bbd5c164ca2e02206c2a8bbb47eabdeed52f17d7df668d521600286406930426e3a9415fe10ed592012102e6e1423f7abde8b70bca3e78a7d030e5efabd3eb35c19302542b5fe7879c1a16" -H "accept: application/json"
+   */
+  async decodeScriptSingle (req, res) {
+    try {
+      const hex = req.params.hex
+
+      if (!hex || hex === '') {
+        return res.status(400).json({ error: 'hex can not be empty' })
+      }
+
+      const result = await this.rawtransactionsUseCases.decodeScript({ hex })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {post} /v6/full-node/rawtransactions/decodeScript Bulk Decode Script
+   * @apiName DecodeBulkScript
+   * @apiGroup RawTransactions
+   * @apiDescription Decode multiple hex-encoded scripts.
+   *
+   * @apiParam {String[]} hexes Array of hex-encoded scripts
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v6/full-node/rawtransactions/decodeScript" -H "accept: application/json" -H "Content-Type: application/json" -d '{"hexes":["01000000013ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a000000006a4730440220540986d1c58d6e76f8f05501c520c38ce55393d0ed7ed3c3a82c69af04221232022058ea43ed6c05fec0eccce749a63332ed4525460105346f11108b9c26df93cd72012103083dfc5a0254613941ddc91af39ff90cd711cdcde03a87b144b883b524660c39ffffffff01807c814a000000001976a914d7e7c4e0b70eaa67ceff9d2823d1bbb9f6df9a5188ac00000000"]}'
+   */
+  async decodeScriptBulk (req, res) {
+    try {
+      const hexes = req.body.hexes
+
+      if (!Array.isArray(hexes)) {
+        return res.status(400).json({ error: 'hexes must be an array' })
+      }
+
+      if (!this.adapters.fullNode.validateArraySize(hexes.length)) {
+        return res.status(400).json({ error: 'Array too large.' })
+      }
+
+      // Validate each hex in the array
+      for (const hex of hexes) {
+        if (!hex || hex === '') {
+          return res.status(400).json({ error: 'Encountered empty hex' })
+        }
+      }
+
+      const result = await this.rawtransactionsUseCases.decodeScripts({ hexes })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {get} /v6/full-node/rawtransactions/getRawTransaction/:txid Get Raw Transaction
+   * @apiName GetRawTransaction
+   * @apiGroup RawTransactions
+   * @apiDescription Return the raw transaction data. If verbose is 'true', returns an Object with information about 'txid'. If verbose is 'false' or omitted, returns a string that is serialized, hex-encoded data for 'txid'.
+   *
+   * @apiParam {String} txid Transaction ID
+   * @apiParam {Boolean} verbose Return verbose data (default false)
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v6/full-node/rawtransactions/getRawTransaction/fe28050b93faea61fa88c4c630f0e1f0a1c24d0082dd0e10d369e13212128f33?verbose=true" -H "accept: application/json"
+   */
+  async getRawTransactionSingle (req, res) {
+    try {
+      const txid = req.params.txid
+      const verbose = req.query.verbose === 'true'
+
+      if (!txid || txid === '') {
+        return res.status(400).json({ error: 'txid can not be empty' })
+      }
+
+      if (txid.length !== 64) {
+        return res.status(400).json({
+          error: `parameter 1 must be of length 64 (not ${txid.length})`
+        })
+      }
+
+      const result = await this.rawtransactionsUseCases.getRawTransactionWithHeight({ txid, verbose })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {post} /v6/full-node/rawtransactions/getRawTransaction Get Bulk Raw Transactions
+   * @apiName GetBulkRawTransactions
+   * @apiGroup RawTransactions
+   * @apiDescription Return the raw transaction data for multiple transactions. If verbose is 'true', returns an Object with information about 'txid'. If verbose is 'false' or omitted, returns a string that is serialized, hex-encoded data for 'txid'.
+   *
+   * @apiParam {String[]} txids Array of transaction IDs
+   * @apiParam {Boolean} verbose Return verbose data (default false)
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v6/full-node/rawtransactions/getRawTransaction" -H "accept: application/json" -H "Content-Type: application/json" -d '{"txids":["a5f972572ee1753e2fd2457dd61ce5f40fa2f8a30173d417e49feef7542c96a1","5165dc531aad05d1149bb0f0d9b7bda99c73e2f05e314bcfb5b4bb9ca5e1af5e"],"verbose":true}'
+   */
+  async getRawTransactionBulk (req, res) {
+    try {
+      const txids = req.body.txids
+      const verbose = !!req.body.verbose
+
+      if (!Array.isArray(txids)) {
+        return res.status(400).json({ error: 'txids must be an array' })
+      }
+
+      if (!this.adapters.fullNode.validateArraySize(txids.length)) {
+        return res.status(400).json({ error: 'Array too large.' })
+      }
+
+      // Validate each txid in the array
+      for (const txid of txids) {
+        if (!txid || txid === '') {
+          return res.status(400).json({ error: 'Encountered empty TXID' })
+        }
+
+        if (txid.length !== 64) {
+          return res.status(400).json({
+            error: `parameter 1 must be of length 64 (not ${txid.length})`
+          })
+        }
+      }
+
+      const result = await this.rawtransactionsUseCases.getRawTransactions({ txids, verbose })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {get} /v6/full-node/rawtransactions/sendRawTransaction/:hex Send Single Raw Transaction
+   * @apiName SendSingleRawTransaction
+   * @apiGroup RawTransactions
+   * @apiDescription Submits single raw transaction (serialized, hex-encoded) to local node and network.
+   *
+   * @apiParam {String} hex Hex-encoded transaction
+   *
+   * @apiExample Example usage:
+   * curl -X GET "https://api.fullstack.cash/v6/full-node/rawtransactions/sendRawTransaction/01000000013ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a000000006a4730440220540986d1c58d6e76f8f05501c520c38ce55393d0ed7ed3c3a82c69af04221232022058ea43ed6c05fec0eccce749a63332ed4525460105346f11108b9c26df93cd72012103083dfc5a0254613941ddc91af39ff90cd711cdcde03a87b144b883b524660c39ffffffff01807c814a000000001976a914d7e7c4e0b70eaa67ceff9d2823d1bbb9f6df9a5188ac00000000" -H "accept: application/json"
+   */
+  async sendRawTransactionSingle (req, res) {
+    try {
+      const hex = req.params.hex
+
+      if (typeof hex !== 'string') {
+        return res.status(400).json({ error: 'hex must be a string' })
+      }
+
+      if (hex === '') {
+        return res.status(400).json({ error: 'Encountered empty hex' })
+      }
+
+      const result = await this.rawtransactionsUseCases.sendRawTransaction({ hex })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  /**
+   * @api {post} /v6/full-node/rawtransactions/sendRawTransaction Send Bulk Raw Transactions
+   * @apiName SendBulkRawTransactions
+   * @apiGroup RawTransactions
+   * @apiDescription Submits multiple raw transaction (serialized, hex-encoded) to local node and network.
+   *
+   * @apiParam {String[]} hexes Array of hex-encoded transactions
+   *
+   * @apiExample Example usage:
+   * curl -X POST "https://api.fullstack.cash/v6/full-node/rawtransactions/sendRawTransaction" -H "accept: application/json" -H "Content-Type: application/json" -d '{"hexes":["01000000013ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a000000006a4730440220540986d1c58d6e76f8f05501c520c38ce55393d0ed7ed3c3a82c69af04221232022058ea43ed6c05fec0eccce749a63332ed4525460105346f11108b9c26df93cd72012103083dfc5a0254613941ddc91af39ff90cd711cdcde03a87b144b883b524660c39ffffffff01807c814a000000001976a914d7e7c4e0b70eaa67ceff9d2823d1bbb9f6df9a5188ac00000000"]}'
+   */
+  async sendRawTransactionBulk (req, res) {
+    try {
+      const hexes = req.body.hexes
+
+      if (!Array.isArray(hexes)) {
+        return res.status(400).json({ error: 'hex must be an array' })
+      }
+
+      if (!this.adapters.fullNode.validateArraySize(hexes.length)) {
+        return res.status(400).json({ error: 'Array too large.' })
+      }
+
+      // Validate each element
+      for (const hex of hexes) {
+        if (hex === '') {
+          return res.status(400).json({ error: 'Encountered empty hex' })
+        }
+      }
+
+      const result = await this.rawtransactionsUseCases.sendRawTransactions({ hexes })
+      return res.status(200).json(result)
+    } catch (err) {
+      return this.handleError(err, res)
+    }
+  }
+
+  handleError (err, res) {
+    wlogger.error('Error in RawTransactionsRESTController:', err)
+
+    const status = err.status || 500
+    const message = err.message || 'Internal server error'
+
+    return res.status(status).json({ error: message })
+  }
+}
+
+export default RawTransactionsRESTController

src/controllers/rest-api/full-node/rawtransactions/index.js

@@ -0,0 +1,58 @@
+/*
+  REST API router for /full-node/rawtransactions routes.
+*/
+
+import express from 'express'
+import RawTransactionsRESTController from './controller.js'
+
+class RawTransactionsRouter {
+  constructor (localConfig = {}) {
+    this.adapters = localConfig.adapters
+    if (!this.adapters) {
+      throw new Error(
+        'Instance of Adapters library required when instantiating RawTransactions REST Router.'
+      )
+    }
+
+    this.useCases = localConfig.useCases
+    if (!this.useCases) {
+      throw new Error(
+        'Instance of Use Cases library required when instantiating RawTransactions REST Router.'
+      )
+    }
+
+    const dependencies = {
+      adapters: this.adapters,
+      useCases: this.useCases
+    }
+
+    this.rawtransactionsController = new RawTransactionsRESTController(dependencies)
+
+    this.apiPrefix = (localConfig.apiPrefix || '').replace(/\/$/, '')
+    this.baseUrl = `${this.apiPrefix}/full-node/rawtransactions`
+    if (!this.baseUrl.startsWith('/')) {
+      this.baseUrl = `/${this.baseUrl}`
+    }
+    this.router = express.Router()
+  }
+
+  attach (app) {
+    if (!app) {
+      throw new Error('Must pass app object when attaching REST API controllers.')
+    }
+
+    this.router.get('/', this.rawtransactionsController.root)
+    this.router.get('/decodeRawTransaction/:hex', this.rawtransactionsController.decodeRawTransactionSingle)
+    this.router.post('/decodeRawTransaction', this.rawtransactionsController.decodeRawTransactionBulk)
+    this.router.get('/decodeScript/:hex', this.rawtransactionsController.decodeScriptSingle)
+    this.router.post('/decodeScript', this.rawtransactionsController.decodeScriptBulk)
+    this.router.get('/getRawTransaction/:txid', this.rawtransactionsController.getRawTransactionSingle)
+    this.router.post('/getRawTransaction', this.rawtransactionsController.getRawTransactionBulk)
+    this.router.get('/sendRawTransaction/:hex', this.rawtransactionsController.sendRawTransactionSingle)
+    this.router.post('/sendRawTransaction', this.rawtransactionsController.sendRawTransactionBulk)
+
+    app.use(this.baseUrl, this.router)
+  }
+}
+
+export default RawTransactionsRouter

src/controllers/rest-api/index.js

@@ -11,6 +11,7 @@ import BlockchainRouter from './full-node/blockchain/index.js'
 import ControlRouter from './full-node/control/index.js'
 import DSProofRouter from './full-node/dsproof/index.js'
 import MiningRouter from './full-node/mining/index.js'
+import RawTransactionsRouter from './full-node/rawtransactions/index.js'
 import config from '../../config/index.js'
 
 class RESTControllers {
@@ -68,6 +69,9 @@ class RESTControllers {
 
     const miningRouter = new MiningRouter(dependencies)
     miningRouter.attach(app)
+
+    const rawtransactionsRouter = new RawTransactionsRouter(dependencies)
+    rawtransactionsRouter.attach(app)
   }
 }
 

src/use-cases/full-node-rawtransactions-use-cases.js

@@ -0,0 +1,121 @@
+/*
+  Use cases for interacting with the BCH full node raw transactions RPC interface.
+*/
+
+import wlogger from '../adapters/wlogger.js'
+
+class RawTransactionsUseCases {
+  constructor (localConfig = {}) {
+    this.adapters = localConfig.adapters
+
+    if (!this.adapters) {
+      throw new Error('Adapters instance required when instantiating RawTransactions use cases.')
+    }
+
+    this.fullNode = this.adapters.fullNode
+    if (!this.fullNode) {
+      throw new Error('Full node adapter required when instantiating RawTransactions use cases.')
+    }
+  }
+
+  async decodeRawTransaction ({ hex }) {
+    return this.fullNode.call('decoderawtransaction', [hex])
+  }
+
+  async decodeRawTransactions ({ hexes }) {
+    try {
+      const promises = hexes.map(hex =>
+        this.fullNode.call('decoderawtransaction', [hex], `decoderawtransaction-${hex.slice(0, 16)}`)
+      )
+
+      return await Promise.all(promises)
+    } catch (err) {
+      wlogger.error('Error in RawTransactionsUseCases.decodeRawTransactions()', err)
+      throw err
+    }
+  }
+
+  async decodeScript ({ hex }) {
+    return this.fullNode.call('decodescript', [hex])
+  }
+
+  async decodeScripts ({ hexes }) {
+    try {
+      const promises = hexes.map(hex =>
+        this.fullNode.call('decodescript', [hex], `decodescript-${hex.slice(0, 16)}`)
+      )
+
+      return await Promise.all(promises)
+    } catch (err) {
+      wlogger.error('Error in RawTransactionsUseCases.decodeScripts()', err)
+      throw err
+    }
+  }
+
+  async getRawTransaction ({ txid, verbose = false }) {
+    const verboseInt = verbose ? 1 : 0
+    return this.fullNode.call('getrawtransaction', [txid, verboseInt])
+  }
+
+  async getRawTransactions ({ txids, verbose = false }) {
+    try {
+      const verboseInt = verbose ? 1 : 0
+      const promises = txids.map(txid =>
+        this.fullNode.call('getrawtransaction', [txid, verboseInt], `getrawtransaction-${txid}`)
+      )
+
+      return await Promise.all(promises)
+    } catch (err) {
+      wlogger.error('Error in RawTransactionsUseCases.getRawTransactions()', err)
+      throw err
+    }
+  }
+
+  async getRawTransactionWithHeight ({ txid, verbose = false }) {
+    const verboseInt = verbose ? 1 : 0
+    const data = await this.fullNode.call('getrawtransaction', [txid, verboseInt])
+
+    if (verbose && data && data.blockhash) {
+      data.height = null
+      try {
+        // Look up the block height and append it to the TX response.
+        const blockHeader = await this.fullNode.call('getblockheader', [data.blockhash, true])
+        data.height = blockHeader.height
+      } catch (err) {
+        // Exit quietly if block header lookup fails
+        wlogger.debug('Could not fetch block header for height lookup', err)
+      }
+    }
+
+    return data
+  }
+
+  async getBlockHeader ({ blockHash, verbose = false }) {
+    return this.fullNode.call('getblockheader', [blockHash, verbose])
+  }
+
+  async sendRawTransaction ({ hex }) {
+    return this.fullNode.call('sendrawtransaction', [hex])
+  }
+
+  async sendRawTransactions ({ hexes }) {
+    // Dev Note: Sending the 'sendrawtransaction' RPC call to a full node in parallel will
+    // not work. Testing showed that the full node will return the same TXID for
+    // different TX hexes. I believe this is by design, to prevent double spends.
+    // In parallel, we are essentially asking the node to broadcast a new TX before
+    // it's finished broadcasting the previous one. Serial execution is required.
+    try {
+      const result = []
+      for (const hex of hexes) {
+        const txid = await this.fullNode.call('sendrawtransaction', [hex], `sendrawtransaction-${hex.slice(0, 16)}`)
+        result.push(txid)
+      }
+      return result
+    } catch (err) {
+      wlogger.error('Error in RawTransactionsUseCases.sendRawTransactions()', err)
+      throw err
+    }
+  }
+}
+
+export default RawTransactionsUseCases

src/use-cases/index.js

@@ -9,6 +9,7 @@ import BlockchainUseCases from './full-node-blockchain-use-cases.js'
 import ControlUseCases from './full-node-control-use-cases.js'
 import DSProofUseCases from './full-node-dsproof-use-cases.js'
 import MiningUseCases from './full-node-mining-use-cases.js'
+import RawTransactionsUseCases from './full-node-rawtransactions-use-cases.js'
 
 class UseCases {
   constructor (localConfig = {}) {
@@ -23,6 +24,7 @@ class UseCases {
     this.control = new ControlUseCases({ adapters: this.adapters })
     this.dsproof = new DSProofUseCases({ adapters: this.adapters })
     this.mining = new MiningUseCases({ adapters: this.adapters })
+    this.rawtransactions = new RawTransactionsUseCases({ adapters: this.adapters })
   }
 
   // Run any startup Use Cases at the start of the app.

test/unit/controllers/blockchain-controller-unit.js

@@ -161,8 +161,7 @@ describe('#blockchain-controller.js', () => {
     it('should validate array size and call use case', async () => {
       const hash = 'a'.repeat(64)
       const req = createMockRequest({
-        body: { hashes: [hash], verbose: true },
-        locals: { proLimit: false }
+        body: { hashes: [hash], verbose: true }
       })
       const res = createMockResponse()
       mockUseCases.blockchain.getBlockHeaders.resolves(['result'])
@@ -172,7 +171,7 @@ describe('#blockchain-controller.js', () => {
       assert.equal(res.statusValue, 200)
       assert.deepEqual(res.jsonData, ['result'])
       assert.isTrue(
-        mockAdapters.fullNode.validateArraySize.calledOnceWithExactly(1, { isProUser: false })
+        mockAdapters.fullNode.validateArraySize.calledOnceWithExactly(1)
       )
       assert.isTrue(
         mockUseCases.blockchain.getBlockHeaders.calledOnceWithExactly({

test/unit/controllers/rawtransactions-controller-unit.js

@@ -0,0 +1,388 @@
+/*
+  Unit tests for RawTransactionsRESTController.
+*/
+
+import { assert } from 'chai'
+import sinon from 'sinon'
+
+import RawTransactionsRESTController from '../../../src/controllers/rest-api/full-node/rawtransactions/controller.js'
+import { createMockRequest, createMockResponse } from '../mocks/controller-mocks.js'
+
+describe('#rawtransactions-controller.js', () => {
+  let sandbox
+  let mockAdapters
+  let mockUseCases
+  let uut
+
+  beforeEach(() => {
+    sandbox = sinon.createSandbox()
+    mockAdapters = {
+      fullNode: {
+        validateArraySize: sandbox.stub().returns(true)
+      }
+    }
+    mockUseCases = {
+      rawtransactions: {
+        decodeRawTransaction: sandbox.stub().resolves({ txid: 'abc123' }),
+        decodeRawTransactions: sandbox.stub().resolves([{ txid: 'abc123' }]),
+        decodeScript: sandbox.stub().resolves({ asm: 'OP_DUP' }),
+        decodeScripts: sandbox.stub().resolves([{ asm: 'OP_DUP' }]),
+        getRawTransaction: sandbox.stub().resolves({ txid: 'abc123' }),
+        getRawTransactionWithHeight: sandbox.stub().resolves({ txid: 'abc123', height: 100 }),
+        getRawTransactions: sandbox.stub().resolves([{ txid: 'abc123' }]),
+        sendRawTransaction: sandbox.stub().resolves('txid123'),
+        sendRawTransactions: sandbox.stub().resolves(['txid1', 'txid2'])
+      }
+    }
+
+    uut = new RawTransactionsRESTController({
+      adapters: mockAdapters,
+      useCases: mockUseCases
+    })
+  })
+
+  afterEach(() => {
+    sandbox.restore()
+  })
+
+  describe('#constructor()', () => {
+    it('should require adapters', () => {
+      assert.throws(() => {
+        // eslint-disable-next-line no-new
+        new RawTransactionsRESTController({ useCases: mockUseCases })
+      }, /Adapters library required/)
+    })
+
+    it('should require rawtransactions use cases', () => {
+      assert.throws(() => {
+        // eslint-disable-next-line no-new
+        new RawTransactionsRESTController({ adapters: mockAdapters, useCases: {} })
+      }, /RawTransactions use cases required/)
+    })
+  })
+
+  describe('#root()', () => {
+    it('should return rawtransactions status', async () => {
+      const req = createMockRequest()
+      const res = createMockResponse()
+
+      await uut.root(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, { status: 'rawtransactions' })
+    })
+  })
+
+  describe('#decodeRawTransactionSingle()', () => {
+    it('should return decoded transaction on success', async () => {
+      const req = createMockRequest({ params: { hex: '01000000' } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, { txid: 'abc123' })
+      assert.isTrue(mockUseCases.rawtransactions.decodeRawTransaction.calledOnce)
+      assert.deepEqual(mockUseCases.rawtransactions.decodeRawTransaction.firstCall.args[0], { hex: '01000000' })
+    })
+
+    it('should return 400 if hex is empty', async () => {
+      const req = createMockRequest({ params: { hex: '' } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'hex can not be empty' })
+    })
+
+    it('should handle errors via handleError', async () => {
+      const error = new Error('RPC error')
+      error.status = 500
+      mockUseCases.rawtransactions.decodeRawTransaction.rejects(error)
+      const req = createMockRequest({ params: { hex: '01000000' } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 500)
+      assert.deepEqual(res.jsonData, { error: 'RPC error' })
+    })
+  })
+
+  describe('#decodeRawTransactionBulk()', () => {
+    it('should return decoded transactions on success', async () => {
+      const req = createMockRequest({ body: { hexes: ['hex1', 'hex2'] } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, [{ txid: 'abc123' }])
+      assert.isTrue(mockUseCases.rawtransactions.decodeRawTransactions.calledOnce)
+    })
+
+    it('should return 400 if hexes is not an array', async () => {
+      const req = createMockRequest({ body: { hexes: 'not-array' } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'hexes must be an array' })
+    })
+
+    it('should return 400 if array is too large', async () => {
+      mockAdapters.fullNode.validateArraySize.returns(false)
+      const req = createMockRequest({ body: { hexes: new Array(25).fill('hex') } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Array too large.' })
+    })
+
+    it('should return 400 if empty hex encountered', async () => {
+      const req = createMockRequest({ body: { hexes: ['hex1', '', 'hex2'] } })
+      const res = createMockResponse()
+
+      await uut.decodeRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Encountered empty hex' })
+    })
+  })
+
+  describe('#decodeScriptSingle()', () => {
+    it('should return decoded script on success', async () => {
+      const req = createMockRequest({ params: { hex: '76a914' } })
+      const res = createMockResponse()
+
+      await uut.decodeScriptSingle(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, { asm: 'OP_DUP' })
+      assert.isTrue(mockUseCases.rawtransactions.decodeScript.calledOnce)
+    })
+
+    it('should return 400 if hex is empty', async () => {
+      const req = createMockRequest({ params: { hex: '' } })
+      const res = createMockResponse()
+
+      await uut.decodeScriptSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'hex can not be empty' })
+    })
+  })
+
+  describe('#decodeScriptBulk()', () => {
+    it('should return decoded scripts on success', async () => {
+      const req = createMockRequest({ body: { hexes: ['script1', 'script2'] } })
+      const res = createMockResponse()
+
+      await uut.decodeScriptBulk(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, [{ asm: 'OP_DUP' }])
+    })
+
+    it('should return 400 if array is too large', async () => {
+      mockAdapters.fullNode.validateArraySize.returns(false)
+      const req = createMockRequest({ body: { hexes: new Array(25).fill('script') } })
+      const res = createMockResponse()
+
+      await uut.decodeScriptBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Array too large.' })
+    })
+  })
+
+  describe('#getRawTransactionSingle()', () => {
+    it('should return raw transaction on success', async () => {
+      const req = createMockRequest({ params: { txid: 'a'.repeat(64) }, query: {} })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, { txid: 'abc123', height: 100 })
+      assert.isTrue(mockUseCases.rawtransactions.getRawTransactionWithHeight.calledOnce)
+    })
+
+    it('should pass verbose=true when query param is set', async () => {
+      const req = createMockRequest({ params: { txid: 'a'.repeat(64) }, query: { verbose: 'true' } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionSingle(req, res)
+
+      assert.isTrue(mockUseCases.rawtransactions.getRawTransactionWithHeight.calledOnce)
+      assert.deepEqual(mockUseCases.rawtransactions.getRawTransactionWithHeight.firstCall.args[0], {
+        txid: 'a'.repeat(64),
+        verbose: true
+      })
+    })
+
+    it('should return 400 if txid is empty', async () => {
+      const req = createMockRequest({ params: { txid: '' } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'txid can not be empty' })
+    })
+
+    it('should return 400 if txid length is not 64', async () => {
+      const req = createMockRequest({ params: { txid: 'short' } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'parameter 1 must be of length 64 (not 5)' })
+    })
+  })
+
+  describe('#getRawTransactionBulk()', () => {
+    it('should return raw transactions on success', async () => {
+      const req = createMockRequest({
+        body: {
+          txids: ['a'.repeat(64), 'b'.repeat(64)],
+          verbose: true
+        }
+      })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, [{ txid: 'abc123' }])
+      assert.isTrue(mockUseCases.rawtransactions.getRawTransactions.calledOnce)
+      assert.deepEqual(mockUseCases.rawtransactions.getRawTransactions.firstCall.args[0], {
+        txids: ['a'.repeat(64), 'b'.repeat(64)],
+        verbose: true
+      })
+    })
+
+    it('should return 400 if txids is not an array', async () => {
+      const req = createMockRequest({ body: { txids: 'not-array' } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'txids must be an array' })
+    })
+
+    it('should return 400 if array is too large', async () => {
+      mockAdapters.fullNode.validateArraySize.returns(false)
+      const req = createMockRequest({ body: { txids: new Array(25).fill('a'.repeat(64)) } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Array too large.' })
+    })
+
+    it('should return 400 if empty txid encountered', async () => {
+      const req = createMockRequest({ body: { txids: ['a'.repeat(64), ''] } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Encountered empty TXID' })
+    })
+
+    it('should return 400 if txid length is not 64', async () => {
+      const req = createMockRequest({ body: { txids: ['short'] } })
+      const res = createMockResponse()
+
+      await uut.getRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'parameter 1 must be of length 64 (not 5)' })
+    })
+  })
+
+  describe('#sendRawTransactionSingle()', () => {
+    it('should return txid on success', async () => {
+      const req = createMockRequest({ params: { hex: '01000000' } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.equal(res.jsonData, 'txid123')
+      assert.isTrue(mockUseCases.rawtransactions.sendRawTransaction.calledOnce)
+    })
+
+    it('should return 400 if hex is empty', async () => {
+      const req = createMockRequest({ params: { hex: '' } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Encountered empty hex' })
+    })
+
+    it('should return 400 if hex is not a string', async () => {
+      const req = createMockRequest({ params: { hex: 123 } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionSingle(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'hex must be a string' })
+    })
+  })
+
+  describe('#sendRawTransactionBulk()', () => {
+    it('should return txids on success', async () => {
+      const req = createMockRequest({ body: { hexes: ['hex1', 'hex2'] } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 200)
+      assert.deepEqual(res.jsonData, ['txid1', 'txid2'])
+      assert.isTrue(mockUseCases.rawtransactions.sendRawTransactions.calledOnce)
+    })
+
+    it('should return 400 if hexes is not an array', async () => {
+      const req = createMockRequest({ body: { hexes: 'not-array' } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'hex must be an array' })
+    })
+
+    it('should return 400 if array is too large', async () => {
+      mockAdapters.fullNode.validateArraySize.returns(false)
+      const req = createMockRequest({ body: { hexes: new Array(25).fill('hex') } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Array too large.' })
+    })
+
+    it('should return 400 if empty hex encountered', async () => {
+      const req = createMockRequest({ body: { hexes: ['hex1', '', 'hex2'] } })
+      const res = createMockResponse()
+
+      await uut.sendRawTransactionBulk(req, res)
+
+      assert.equal(res.statusValue, 400)
+      assert.deepEqual(res.jsonData, { error: 'Encountered empty hex' })
+    })
+  })
+})

test/unit/controllers/rest-api-index-unit.js

@@ -10,6 +10,7 @@ import BlockchainRouter from '../../../src/controllers/rest-api/full-node/blockc
 import ControlRouter from '../../../src/controllers/rest-api/full-node/control/index.js'
 import DSProofRouter from '../../../src/controllers/rest-api/full-node/dsproof/index.js'
 import MiningRouter from '../../../src/controllers/rest-api/full-node/mining/index.js'
+import RawTransactionsRouter from '../../../src/controllers/rest-api/full-node/rawtransactions/index.js'
 
 describe('#controllers/rest-api/index.js', () => {
   let sandbox
@@ -56,6 +57,17 @@ describe('#controllers/rest-api/index.js', () => {
       mining: {
         getMiningInfo: () => {},
         getNetworkHashPS: () => {}
+      },
+      rawtransactions: {
+        decodeRawTransaction: () => {},
+        decodeRawTransactions: () => {},
+        decodeScript: () => {},
+        decodeScripts: () => {},
+        getRawTransaction: () => {},
+        getRawTransactionWithHeight: () => {},
+        getRawTransactions: () => {},
+        sendRawTransaction: () => {},
+        sendRawTransactions: () => {}
       }
     }
   })
@@ -86,6 +98,7 @@ describe('#controllers/rest-api/index.js', () => {
       const controlAttachStub = sandbox.stub(ControlRouter.prototype, 'attach')
       const dsproofAttachStub = sandbox.stub(DSProofRouter.prototype, 'attach')
       const miningAttachStub = sandbox.stub(MiningRouter.prototype, 'attach')
+      const rawtransactionsAttachStub = sandbox.stub(RawTransactionsRouter.prototype, 'attach')
       const restControllers = new RESTControllers({
         adapters: mockAdapters,
         useCases: mockUseCases
@@ -102,6 +115,8 @@ describe('#controllers/rest-api/index.js', () => {
       assert.equal(dsproofAttachStub.getCall(0).args[0], app)
       assert.isTrue(miningAttachStub.calledOnce)
       assert.equal(miningAttachStub.getCall(0).args[0], app)
+      assert.isTrue(rawtransactionsAttachStub.calledOnce)
+      assert.equal(rawtransactionsAttachStub.getCall(0).args[0], app)
     })
   })
 })

test/unit/use-cases/full-node-rawtransactions-use-cases-unit.js

@@ -0,0 +1,267 @@
+/*
+  Unit tests for RawTransactionsUseCases.
+*/
+
+import { assert } from 'chai'
+
+import RawTransactionsUseCases from '../../../src/use-cases/full-node-rawtransactions-use-cases.js'
+
+describe('#full-node-rawtransactions-use-cases.js', () => {
+  let mockAdapters
+  let uut
+
+  beforeEach(() => {
+    mockAdapters = {
+      fullNode: {
+        call: async () => ({})
+      }
+    }
+
+    uut = new RawTransactionsUseCases({ adapters: mockAdapters })
+  })
+
+  describe('#constructor()', () => {
+    it('should require adapters', () => {
+      assert.throws(() => {
+        // eslint-disable-next-line no-new
+        new RawTransactionsUseCases()
+      }, /Adapters instance required/)
+    })
+
+    it('should require full node adapter', () => {
+      assert.throws(() => {
+        // eslint-disable-next-line no-new
+        new RawTransactionsUseCases({ adapters: {} })
+      }, /Full node adapter required/)
+    })
+  })
+
+  describe('#decodeRawTransaction()', () => {
+    it('should call full node adapter with correct method', async () => {
+      let capturedMethod = ''
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedMethod = method
+        capturedParams = params
+        return { txid: 'abc123', version: 2 }
+      }
+
+      const result = await uut.decodeRawTransaction({ hex: '01000000' })
+
+      assert.equal(capturedMethod, 'decoderawtransaction')
+      assert.deepEqual(capturedParams, ['01000000'])
+      assert.deepEqual(result, { txid: 'abc123', version: 2 })
+    })
+  })
+
+  describe('#decodeRawTransactions()', () => {
+    it('should call full node adapter for each hex in parallel', async () => {
+      const callCount = { count: 0 }
+      mockAdapters.fullNode.call = async (method, params) => {
+        callCount.count++
+        return { txid: `tx${callCount.count}`, hex: params[0] }
+      }
+
+      const hexes = ['hex1', 'hex2', 'hex3']
+      const result = await uut.decodeRawTransactions({ hexes })
+
+      assert.equal(callCount.count, 3)
+      assert.equal(result.length, 3)
+      assert.equal(result[0].txid, 'tx1')
+      assert.equal(result[1].txid, 'tx2')
+      assert.equal(result[2].txid, 'tx3')
+    })
+  })
+
+  describe('#decodeScript()', () => {
+    it('should call full node adapter with correct method', async () => {
+      let capturedMethod = ''
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedMethod = method
+        capturedParams = params
+        return { asm: 'OP_DUP OP_HASH160', type: 'pubkeyhash' }
+      }
+
+      const result = await uut.decodeScript({ hex: '76a914' })
+
+      assert.equal(capturedMethod, 'decodescript')
+      assert.deepEqual(capturedParams, ['76a914'])
+      assert.deepEqual(result, { asm: 'OP_DUP OP_HASH160', type: 'pubkeyhash' })
+    })
+  })
+
+  describe('#decodeScripts()', () => {
+    it('should call full node adapter for each hex in parallel', async () => {
+      const callCount = { count: 0 }
+      mockAdapters.fullNode.call = async (method, params) => {
+        callCount.count++
+        return { asm: `script${callCount.count}`, hex: params[0] }
+      }
+
+      const hexes = ['script1', 'script2']
+      const result = await uut.decodeScripts({ hexes })
+
+      assert.equal(callCount.count, 2)
+      assert.equal(result.length, 2)
+    })
+  })
+
+  describe('#getRawTransaction()', () => {
+    it('should call full node adapter with verbose=false by default', async () => {
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedParams = params
+        return '01000000'
+      }
+
+      await uut.getRawTransaction({ txid: 'abc123' })
+
+      assert.deepEqual(capturedParams, ['abc123', 0])
+    })
+
+    it('should call full node adapter with verbose=true when specified', async () => {
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedParams = params
+        return { txid: 'abc123', version: 2 }
+      }
+
+      await uut.getRawTransaction({ txid: 'abc123', verbose: true })
+
+      assert.deepEqual(capturedParams, ['abc123', 1])
+    })
+  })
+
+  describe('#getRawTransactions()', () => {
+    it('should call full node adapter for each txid in parallel', async () => {
+      const callCount = { count: 0 }
+      mockAdapters.fullNode.call = async (method, params) => {
+        callCount.count++
+        return { txid: params[0], version: 2 }
+      }
+
+      const txids = ['tx1', 'tx2']
+      const result = await uut.getRawTransactions({ txids, verbose: true })
+
+      assert.equal(callCount.count, 2)
+      assert.equal(result.length, 2)
+    })
+  })
+
+  describe('#getRawTransactionWithHeight()', () => {
+    it('should return transaction without height when verbose=false', async () => {
+      mockAdapters.fullNode.call = async (method, params) => {
+        if (method === 'getrawtransaction') {
+          return '01000000'
+        }
+        return {}
+      }
+
+      const result = await uut.getRawTransactionWithHeight({ txid: 'abc123', verbose: false })
+
+      assert.equal(result, '01000000')
+    })
+
+    it('should fetch and append height when verbose=true and blockhash exists', async () => {
+      let callCount = 0
+      mockAdapters.fullNode.call = async (method, params) => {
+        callCount++
+        if (method === 'getrawtransaction') {
+          return { txid: 'abc123', blockhash: 'block123' }
+        }
+        if (method === 'getblockheader') {
+          return { height: 100, hash: 'block123' }
+        }
+        return {}
+      }
+
+      const result = await uut.getRawTransactionWithHeight({ txid: 'abc123', verbose: true })
+
+      assert.equal(callCount, 2)
+      assert.equal(result.height, 100)
+      assert.equal(result.txid, 'abc123')
+    })
+
+    it('should handle block header lookup failure gracefully', async () => {
+      let callCount = 0
+      mockAdapters.fullNode.call = async (method, params) => {
+        callCount++
+        if (method === 'getrawtransaction') {
+          return { txid: 'abc123', blockhash: 'block123' }
+        }
+        if (method === 'getblockheader') {
+          throw new Error('Block not found')
+        }
+        return {}
+      }
+
+      const result = await uut.getRawTransactionWithHeight({ txid: 'abc123', verbose: true })
+
+      assert.equal(callCount, 2)
+      assert.isNull(result.height)
+      assert.equal(result.txid, 'abc123')
+    })
+  })
+
+  describe('#getBlockHeader()', () => {
+    it('should call full node adapter with correct method', async () => {
+      let capturedMethod = ''
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedMethod = method
+        capturedParams = params
+        return { height: 100, hash: 'block123' }
+      }
+
+      const result = await uut.getBlockHeader({ blockHash: 'block123', verbose: true })
+
+      assert.equal(capturedMethod, 'getblockheader')
+      assert.deepEqual(capturedParams, ['block123', true])
+      assert.deepEqual(result, { height: 100, hash: 'block123' })
+    })
+  })
+
+  describe('#sendRawTransaction()', () => {
+    it('should call full node adapter with correct method', async () => {
+      let capturedMethod = ''
+      let capturedParams = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        capturedMethod = method
+        capturedParams = params
+        return 'txid123'
+      }
+
+      const result = await uut.sendRawTransaction({ hex: '01000000' })
+
+      assert.equal(capturedMethod, 'sendrawtransaction')
+      assert.deepEqual(capturedParams, ['01000000'])
+      assert.equal(result, 'txid123')
+    })
+  })
+
+  describe('#sendRawTransactions()', () => {
+    it('should send transactions serially, not in parallel', async () => {
+      const callOrder = []
+      mockAdapters.fullNode.call = async (method, params) => {
+        callOrder.push(params[0])
+        // Simulate some async work
+        await new Promise(resolve => setTimeout(resolve, 10))
+        return `txid-${params[0]}`
+      }
+
+      const hexes = ['hex1', 'hex2', 'hex3']
+      const startTime = Date.now()
+      const result = await uut.sendRawTransactions({ hexes })
+      const endTime = Date.now()
+
+      // Should take at least 30ms if serial (3 * 10ms)
+      assert.isAtLeast(endTime - startTime, 25)
+      assert.deepEqual(callOrder, ['hex1', 'hex2', 'hex3'])
+      assert.equal(result.length, 3)
+      assert.equal(result[0], 'txid-hex1')
+      assert.equal(result[1], 'txid-hex2')
+      assert.equal(result[2], 'txid-hex3')
+    })
+  })
+})