Merge pull request #247 from Permissionless-Software-Foundation/ct-unstable

fix(getTokenData): Adding ability to retrieve tx history

package.json

@@ -12,7 +12,7 @@
     "test": "nyc mocha --trace-warnings --unhandled-rejections=strict --timeout 30000 test/unit/",
     "test:integration": "npm run test:integration:bchn",
     "test:integration:nft": "export RESTURL=https://bchn.fullstack.cash/v5/ && export IS_USING_FREE_TIER=true && mocha --timeout 30000 -g '#nft1' test/integration/chains/bchn/slp.js",
-    "test:integration:abc": "export RESTURL=https://abc.fullstack.cash/v5/ && export IS_USING_FREE_TIER=true && mocha --timeout 30000 test/integration/ && mocha --timeout 30000 test/integration/chains/abc/",
+    "test:integration:abc": "export RESTURL=https://abc.fullstack.cash/v5/ && mocha --timeout 30000 test/integration/ && mocha --timeout 30000 test/integration/chains/abc/",
     "test:integration:bchn": "export RESTURL=https://bchn.fullstack.cash/v5/ && export IS_USING_FREE_TIER=true && mocha --timeout 30000 test/integration/ && mocha --timeout 30000 test/integration/chains/bchn/",
     "test:integration:bchn:slpdb": "export TESTSLP=1 && export RESTURL=https://bchn.fullstack.cash/v5/ && export IS_USING_FREE_TIER=true && mocha --timeout 30000 test/integration/ && mocha --timeout 30000 test/integration/chains/bchn/",
     "test:integration:local:abc": "export RESTURL=http://localhost:3000/v5/ && mocha --timeout 30000 test/integration && mocha --timeout 30000 test/integration/chains/abc/",

src/address.js

@@ -133,7 +133,7 @@ class Address {
    * @api Address.toEcashAddress() toEcashAddress()
    * @apiName toEcashAddress
    * @apiGroup Address
-   * @apiDescription Convert legacy to cashAddress format
+   * @apiDescription Convert legacy to eCash (XEC) format
    *
    * @apiExample Example usage:
    * // mainnet
@@ -158,6 +158,35 @@ class Address {
     return ecashAddress.split(':')[1]
   }
 
+  /**
+   * @api Address.toEtokenAddress() toEtokenAddress()
+   * @apiName toEtokenAddress
+   * @apiGroup Address
+   * @apiDescription Convert legacy to eToken (XEC) format
+   *
+   * @apiExample Example usage:
+   * // mainnet
+   * bchjs.Address.toEtokenAddress('bitcoincash:qq50d800hgunr8u4trz3uuppspk3mds0dy9978plt2')
+   * // etoken:qq50d800hgunr8u4trz3uuppspk3mds0dyug2v69da
+   *
+   * // mainnet no prefix
+   * bchjs.Address.toEtokenAddress('bitcoincash:qq50d800hgunr8u4trz3uuppspk3mds0dy9978plt2', false)
+   * // qq50d800hgunr8u4trz3uuppspk3mds0dyug2v69da
+   *
+   */
+  toEtokenAddress (address, prefix = true) {
+    const decoded = this._decode(address)
+
+    const etokenAddress = cashaddr.encode(
+      'etoken',
+      decoded.type,
+      decoded.hash
+    )
+
+    if (prefix) return etokenAddress
+    return etokenAddress.split(':')[1]
+  }
+
   /**
    * @api Address.ecashtoCashAddress() ecashtoCashAddress()
    * @apiName ecashtoCashAddress

src/electrumx.js

@@ -7,6 +7,7 @@ const axios = require('axios')
 
 // Local libraries.
 const Blockchain = require('./blockchain')
+// const Address = require('./address')
 
 // let _this
 
@@ -32,7 +33,9 @@ class ElectrumX {
       }
     }
 
+    // Encapsulate dependencies
     this.blockchain = new Blockchain(config)
+    // this.address = new Address(config)
 
     // _this = this
   }
@@ -104,6 +107,8 @@ class ElectrumX {
    */
   async utxo (address) {
     try {
+      // console.log(`electrumx.js/utxo() restURL: ${this.restURL}`)
+
       // Handle single address.
       if (typeof address === 'string') {
         const response = await axios.get(

src/psf-slp-indexer.js

@@ -41,7 +41,7 @@ class PsfSlpIndexer {
     this.rawTransaction = new RawTransaction(config)
     this.slpUtils = new SlpUtils(config)
 
-  // _this = this
+    // _this = this
   }
 
   /**
@@ -194,6 +194,7 @@ class PsfSlpIndexer {
    *   }
    * }
    *
+   *
    */
 
   async tokenStats (tokenId, withTxHistory = false) {
@@ -374,6 +375,73 @@ class PsfSlpIndexer {
       return false
     }
   }
+
+  /**
+   * @api PsfSlpIndexer.getTokenData()  getTokenData()
+   * @apiName Token Data
+   * @apiGroup PSF SLP
+   * @apiDescription Get mutable and immutable data if the token contains them.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     let tokenData = await bchjs.PsfSlpIndexer.getTokenData('a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2')
+   *     console.log(tokenData)
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   * {
+   *   genesisData: {
+   *     type: 1,
+   *     ticker: 'TROUT',
+   *     name: "Trout's test token",
+   *     tokenId: 'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2',
+   *     documentUri: 'troutsblog.com',
+   *     documentHash: '',
+   *     decimals: 2,
+   *     mintBatonIsActive: true,
+   *     tokensInCirculationBN: '100098953386',
+   *     tokensInCirculationStr: '100098953386',
+   *     blockCreated: 622414,
+   *     totalBurned: '1046614',
+   *     totalMinted: '100100000000'
+   *     ]
+   *   },
+   *  immutableData :{
+   *     issuer:"FullStack.cash.",
+   *     website:"https://fullstack.cash/",
+   *     dateCreated:"2022-01-11"
+   *   },
+   *  mutableData :{
+   *    "tokenIcon":"https://gateway.ipfs.io/ipfs/bafybeiehitanirn5gmhqjg44xrmdtomn4n5lu5yjoepsvgpswk5mggaw6i/LP_logo-1.png",
+   *    "about":"Mutable data managed with npm package: https://www.npmjs.com/package/slp-mutable-data"
+   *   }
+   * }
+   *
+   */
+  async getTokenData (tokenId, withTxHistory = false) {
+    try {
+      const url = `${this.restURL}psf/slp/token/data`
+      // console.log(`url: ${url}`)
+
+      // Handle single address.
+      if (typeof tokenId === 'string') {
+        const response = await axios.post(
+          // 'https://bchn.fullstack.cash/v5/psf/slp/token/data/',
+          url,
+          { tokenId, withTxHistory },
+          this.axiosOptions
+        )
+        return response.data
+      }
+      throw new Error('Input tokenId must be a string.')
+    } catch (error) {
+      if (error.response && error.response.data) throw error.response.data
+      else throw error
+    }
+  }
 }
 
 module.exports = PsfSlpIndexer

src/utxo.js

@@ -10,6 +10,7 @@ const Electrumx = require('./electrumx')
 const Slp = require('./slp/slp')
 const PsfSlpIndexer = require('./psf-slp-indexer')
 const BigNumber = require('bignumber.js')
+const Blockchain = require('./blockchain')
 
 class UTXO {
   constructor (config = {}) {
@@ -18,6 +19,7 @@ class UTXO {
     this.slp = new Slp(config)
     this.psfSlpIndexer = new PsfSlpIndexer(config)
     this.BigNumber = BigNumber
+    this.blockchain = new Blockchain(config)
   }
 
   /**
@@ -80,7 +82,10 @@ class UTXO {
       }
 
       // Ensure the address is a BCH address.
-      const addr = this.slp.Address.toCashAddress(address)
+      let addr = address
+      if (!addr.includes('ecash')) {
+        addr = this.slp.Address.toCashAddress(address)
+      }
 
       // Get the UTXOs associated with the address.
       const utxoData = await this.electrumx.utxo(addr)
@@ -92,7 +97,7 @@ class UTXO {
       // Get SLP UTXOs from the psf-slp-indexer
       try {
         const slpUtxoData = await this.psfSlpIndexer.balance(addr)
-        console.log(`slpUtxoData: ${JSON.stringify(slpUtxoData, null, 2)}`)
+        // console.log(`slpUtxoData: ${JSON.stringify(slpUtxoData, null, 2)}`)
 
         slpUtxos = slpUtxoData.balance.utxos
       } catch (err) {
@@ -336,6 +341,57 @@ class UTXO {
 
     return utxos[largestIndex]
   }
+
+  /**
+   * @api Utxo.isValid() isValid()
+   * @apiName isValid
+   * @apiGroup UTXO
+   * @apiDescription Validate that UTXO exists and is still spendable.
+   *
+   * Given a UTXO, this method will return true if the UTXO is still in the
+   * mempool and still valid for spending. It will return false if the UTXO
+   * has been spent.
+   *
+   * @apiExample Example usage:
+   * (async () => {
+   *   try {
+   *     const utxos = await bchjs.Utxo.get('bitcoincash:qq54fgjn3hz0357n8a6guy4demw9xfkjk5jcj0xr0z');
+   *     const isValid = bchjs.Utxo.isValid(utxos.bchUtxos[0])
+   *     console.log(isValid);
+   *   } catch(error) {
+   *    console.error(error)
+   *   }
+   * })()
+   *
+   * // returns
+   *  true
+   */
+  async isValid (utxo) {
+    try {
+      // console.log('utxo: ', utxo)
+
+      // Convert different properties from different indexers
+      const txid = utxo.txid || utxo.tx_hash
+      const vout = utxo.vout | utxo.tx_pos
+
+      // Query the full node
+      const txOut = await this.blockchain.getTxOut(txid, vout, true)
+      // console.log('txOut: ', txOut)
+
+      // Simplify results to either true or false.
+      let isValid = null
+      if (txOut === null) {
+        isValid = false
+      } else {
+        isValid = true
+      }
+
+      return isValid
+    } catch (err) {
+      console.log('Error in Utxo.isValid()')
+      throw err
+    }
+  }
 }
 
 module.exports = UTXO

test/integration/chains/abc/psf-slp-indexer-integration.js

@@ -0,0 +1,38 @@
+/*
+  Integration tests for the psf-slp-indexer.js library, specific to the eCash
+  blockchain.
+*/
+
+// Global npm libraries
+const assert = require('chai').assert
+
+// Local libraries
+const BCHJS = require('../../../../src/bch-js')
+let bchjs
+
+describe('#psf-slp-indexer', () => {
+  beforeEach(async () => {
+    // Introduce a delay so that the BVT doesn't trip the rate limits.
+    if (process.env.IS_USING_FREE_TIER) await sleep(3000)
+
+    bchjs = new BCHJS()
+  })
+
+  describe('#balance', () => {
+    it('should get token balance for an ecash address', async () => {
+      const addr = 'ecash:qr5c4hfy52zn87484cucvzle5pljz0gtr5vhtw9z09'
+
+      const result = await bchjs.PsfSlpIndexer.balance(addr)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+      assert.property(result.balance, 'utxos')
+      assert.property(result.balance, 'txs')
+      assert.property(result.balance, 'balances')
+    })
+  })
+})
+
+// Promise-based sleep function
+function sleep (ms) {
+  return new Promise(resolve => setTimeout(resolve, ms))
+}

test/integration/chains/abc/utxo-integration.js

@@ -2,10 +2,10 @@
   Integration tests for the utxo.js library.
 */
 
-// const assert = require('chai').assert
+const assert = require('chai').assert
 
-// const BCHJS = require('../../../../src/bch-js')
-// const bchjs = new BCHJS()
+const BCHJS = require('../../../../src/bch-js')
+const bchjs = new BCHJS()
 
 describe('#UTXO', () => {
   beforeEach(async () => {
@@ -14,25 +14,23 @@ describe('#UTXO', () => {
     if (process.env.IS_USING_FREE_TIER) await sleep(1500)
   })
 
-  /*
   describe('#get', () => {
     it('should get hydrated and filtered UTXOs for an address', async () => {
-      // const addr = 'bitcoincash:qqh793x9au6ehvh7r2zflzguanlme760wuzehgzjh9'
-      const addr = 'simpleledger:qzv3zz2trz0xgp6a96lu4m6vp2nkwag0kvyucjzqt9'
+      const addr = 'ecash:qr5c4hfy52zn87484cucvzle5pljz0gtr5vhtw9z09'
+      // const addr = 'simpleledger:qzv3zz2trz0xgp6a96lu4m6vp2nkwag0kvyucjzqt9'
 
       const result = await bchjs.Utxo.get(addr)
       // console.log(`result: ${JSON.stringify(result, null, 2)}`)
 
-      assert.isArray(result)
-      assert.property(result[0], 'address')
-      assert.property(result[0], 'bchUtxos')
-      assert.property(result[0], 'nullUtxos')
-      assert.property(result[0], 'slpUtxos')
-      assert.isArray(result[0].bchUtxos)
-      assert.isArray(result[0].nullUtxos)
+      // assert.isArray(result)
+      assert.property(result, 'address')
+      assert.property(result, 'bchUtxos')
+      assert.property(result, 'nullUtxos')
+      assert.property(result, 'slpUtxos')
+      assert.isArray(result.bchUtxos)
+      assert.isArray(result.nullUtxos)
     })
   })
-  */
 })
 
 function sleep (ms) {

test/integration/chains/bchn/psf-slp-indexer.integration.js

@@ -1,9 +1,12 @@
 /*
-  Integration tests for the psf-slp-indexer.js library
+  Integration tests for the psf-slp-indexer.js library, specific to the BCH
+  blockchain.
 */
 
+// Global npm libraries
 const assert = require('chai').assert
 
+// Local libraries
 const BCHJS = require('../../../../src/bch-js')
 let bchjs
 
@@ -124,6 +127,34 @@ describe('#psf-slp-indexer', () => {
       }
     })
   })
+
+  describe('#getTokenData', () => {
+    it('should get token data', async () => {
+      const tokenId =
+        'd9aafa7acb514c597caf440ae268b5e4e955f2687e05f044cdf8fd9550d9a27b'
+
+      // bchjs.PsfSlpIndexer.restURL = 'http://localhost:3000/v5/'
+      const result = await bchjs.PsfSlpIndexer.getTokenData(tokenId)
+      // console.log('result: ', result)
+
+      assert.property(result, 'genesisData')
+      assert.property(result, 'immutableData')
+      assert.property(result, 'mutableData')
+
+      assert.isObject(result.genesisData)
+      assert.isString(result.immutableData)
+      assert.isString(result.mutableData)
+    })
+
+    it('should get token data with a transaction history', async () => {
+      const tokenId = '43eddfb11c9941edffb8c8815574bb0a43969a7b1de39ad14cd043eaa24fd38d'
+
+      const result = await bchjs.PsfSlpIndexer.getTokenData(tokenId, true)
+      // console.log('result: ', result)
+
+      assert.isArray(result.genesisData.txs)
+    })
+  })
 })
 
 // Promise-based sleep function

test/integration/chains/bchn/utxo-integration.js

@@ -84,10 +84,10 @@ describe('#UTXO', () => {
     })
 
     it('should handle Type1 minting batons', async () => {
-      const addr = 'simpleledger:qz5l5yzz9r09hw9aadcz53elp2knx6gyg5qk3s8md7'
+      const addr = 'simpleledger:qrp4mlmsrtwlvjn4seuchvtmus06tuqmpv4awvv7m7'
 
       const result = await bchjs.Utxo.get(addr)
-      console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
 
       // Assert that minting batons are correctly identified.
       assert.isAbove(result.slpUtxos.type1.mintBatons.length, 0)
@@ -104,7 +104,7 @@ describe('#UTXO', () => {
     })
 
     it('should filter Group tokens and mint batons', async () => {
-      const addr = 'bitcoincash:qzeqcrpe5fcnslv8rfqjq4gh4gzdwytmdc4qmh0ztv'
+      const addr = 'bitcoincash:qrp4mlmsrtwlvjn4seuchvtmus06tuqmpvex9he79q'
 
       const result = await bchjs.Utxo.get(addr)
       // console.log(`result: ${JSON.stringify(result, null, 2)}`)
@@ -114,13 +114,71 @@ describe('#UTXO', () => {
     })
 
     it('should filter NFTs', async () => {
-      const addr = 'simpleledger:qq7vp2kvejsql898a2760kuq6xz00h0a5vuwu9lywu'
+      const addr = 'bitcoincash:qrp4mlmsrtwlvjn4seuchvtmus06tuqmpvex9he79q'
 
       const result = await bchjs.Utxo.get(addr)
-      console.log(`result: ${JSON.stringify(result, null, 2)}`)
+      // console.log(`result: ${JSON.stringify(result, null, 2)}`)
 
-      // assert.isAbove(result.slpUtxos.group.tokens.length, 0)
-      // assert.isAbove(result.slpUtxos.group.mintBatons.length, 0)
+      assert.isAbove(result.slpUtxos.nft.tokens.length, 0)
+    })
+  })
+
+  describe('#isValid', () => {
+    it('should return true for valid UTXO with fullnode properties', async () => {
+      const utxo = {
+        txid: 'b94e1ff82eb5781f98296f0af2488ff06202f12ee92b0175963b8dba688d1b40',
+        vout: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result)
+
+      assert.equal(result, true)
+    })
+
+    it('should return true for valid UTXO with fulcrum properties', async () => {
+      const utxo = {
+        tx_hash: 'b94e1ff82eb5781f98296f0af2488ff06202f12ee92b0175963b8dba688d1b40',
+        tx_pos: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result)
+
+      assert.equal(result, true)
+    })
+
+    it('should return true for valid UTXO with fullnode properties', async () => {
+      const utxo = {
+        txid: '17754221b29f189532d4fc2ae89fb467ad2dede30fdec4854eb2129b3ba90d7a',
+        vout: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result)
+
+      assert.equal(result, false)
+    })
+
+    it('should return true for valid UTXO with fulcrum properties', async () => {
+      const utxo = {
+        tx_hash: '17754221b29f189532d4fc2ae89fb467ad2dede30fdec4854eb2129b3ba90d7a',
+        tx_pos: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result
+
+      assert.equal(result, false)
+    })
+
+    it('should process output of Utxo.get()', async () => {
+      const utxo = await bchjs.Utxo.get('bitcoincash:qr4yscpw9jgq8ltajfeknpj32kamkf9knujffcdhyq')
+      // console.log(`utxo: ${JSON.stringify(utxo, null, 2)}`)
+
+      const result = await bchjs.Utxo.isValid(utxo.bchUtxos[0])
+
+      assert.equal(result, true)
     })
   })
 })

test/unit/address.js

@@ -935,4 +935,44 @@ describe('#address.js', () => {
       })
     })
   })
+
+  describe('#toEcashAddress', () => {
+    it('should convert a BCH address to an eCash address', () => {
+      const cashAddr = 'bitcoincash:qr24z7q6s26d9wr078lr2pxsmxg22cyn9s7yw984vk'
+
+      const result = bchjs.Address.toEcashAddress(cashAddr)
+      // console.log('result: ', result)
+
+      assert.equal(result, 'ecash:qr24z7q6s26d9wr078lr2pxsmxg22cyn9s8f6wu02p')
+    })
+
+    it('should convert a BCH address to an eCash address without a prefix', () => {
+      const cashAddr = 'bitcoincash:qr24z7q6s26d9wr078lr2pxsmxg22cyn9s7yw984vk'
+
+      const result = bchjs.Address.toEcashAddress(cashAddr, false)
+      // console.log('result: ', result)
+
+      assert.equal(result, 'qr24z7q6s26d9wr078lr2pxsmxg22cyn9s8f6wu02p')
+    })
+  })
+
+  describe('#toEtokenAddress', () => {
+    it('should convert a BCH address to an eToken address', () => {
+      const cashAddr = 'bitcoincash:qr24z7q6s26d9wr078lr2pxsmxg22cyn9s7yw984vk'
+
+      const result = bchjs.Address.toEtokenAddress(cashAddr)
+      // console.log('result: ', result)
+
+      assert.equal(result, 'etoken:qr24z7q6s26d9wr078lr2pxsmxg22cyn9sfhnv2gwk')
+    })
+
+    it('should convert a BCH address to an eToken address without a prefix', () => {
+      const cashAddr = 'bitcoincash:qr24z7q6s26d9wr078lr2pxsmxg22cyn9s7yw984vk'
+
+      const result = bchjs.Address.toEtokenAddress(cashAddr, false)
+      // console.log('result: ', result)
+
+      assert.equal(result, 'qr24z7q6s26d9wr078lr2pxsmxg22cyn9sfhnv2gwk')
+    })
+  })
 })

test/unit/fixtures/psf-slp-indexer-mock.js

@@ -144,10 +144,17 @@ const tokenData01 = {
   qty: {}
 }
 
+const tokenData = {
+  genesisData: tokenStats.tokenData,
+  immutableData: 'ipfs://bafybeidzfi3sictag4noy746gniyiwwcgio565xuzelmjfwxnga6qyiyai',
+  mutableData: 'ipfs://bafybeie6t5uyupddc7azms737xg4hxrj7i5t5ov3lb5g2qeehaujj6ak64'
+}
+
 module.exports = {
   tokenStats,
   txData,
   balance,
   status,
-  tokenData01
+  tokenData01,
+  tokenData
 }

test/unit/psf-slp-indexer.js

@@ -336,4 +336,79 @@ describe('#PsfSlpIndexer', () => {
       assert.equal(result, false)
     })
   })
+
+  describe('#getTokenData', () => {
+    it('should GET token data', async () => {
+      // Stub the network call.
+      sandbox.stub(axios, 'post').resolves({ data: mockData.tokenData })
+
+      const tokenId =
+        'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+      const result = await bchjs.PsfSlpIndexer.getTokenData(tokenId)
+      assert.property(result, 'genesisData')
+      assert.property(result, 'immutableData')
+      assert.property(result, 'mutableData')
+
+      assert.isObject(result.genesisData)
+      assert.isString(result.immutableData)
+      assert.isString(result.mutableData)
+
+      assert.property(result.genesisData, 'type')
+      assert.property(result.genesisData, 'ticker')
+      assert.property(result.genesisData, 'name')
+      assert.property(result.genesisData, 'tokenId')
+      assert.property(result.genesisData, 'documentUri')
+      assert.property(result.genesisData, 'documentHash')
+      assert.property(result.genesisData, 'decimals')
+      assert.property(result.genesisData, 'mintBatonIsActive')
+      assert.property(result.genesisData, 'tokensInCirculationBN')
+      assert.property(result.genesisData, 'tokensInCirculationStr')
+      assert.property(result.genesisData, 'blockCreated')
+      assert.property(result.genesisData, 'totalBurned')
+      assert.property(result.genesisData, 'totalMinted')
+    })
+
+    it('should throw an error for improper input', async () => {
+      try {
+        const tokenId = 12345
+
+        await bchjs.PsfSlpIndexer.getTokenData(tokenId)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        // console.log(`err: `, err)
+        assert.include(err.message, 'Input tokenId must be a string.')
+      }
+    })
+
+    it('should handle axios error', async () => {
+      try {
+        // Stub the network call.
+        sandbox.stub(axios, 'post').throws(new Error('test error'))
+
+        const tokenId =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.getTokenData(tokenId)
+        // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.include(err.message, 'test error')
+      }
+    })
+
+    it('should handle request error', async () => {
+      try {
+        // Stub the network call.
+        const testErr = new Error()
+        testErr.response = { data: { status: 422 } }
+        sandbox.stub(axios, 'post').throws(testErr)
+
+        const tokenId =
+          'a4fb5c2da1aa064e25018a43f9165040071d9e984ba190c222a7f59053af84b2'
+        await bchjs.PsfSlpIndexer.getTokenData(tokenId)
+        assert.equal(true, false, 'Unexpected result!')
+      } catch (err) {
+        assert.equal(err.status, 422)
+      }
+    })
+  })
 })

test/unit/utxo-unit.js

@@ -174,4 +174,36 @@ describe('#utxo', () => {
       assert.equal(result.nullUtxos.length, 0)
     })
   })
+
+  describe('#isValid', () => {
+    it('should return false if getTxOut() returns null', async () => {
+      // Mock dependencies
+      sandbox.stub(bchjs.Utxo.blockchain, 'getTxOut').resolves(null)
+
+      const utxo = {
+        tx_hash: '17754221b29f189532d4fc2ae89fb467ad2dede30fdec4854eb2129b3ba90d7a',
+        tx_pos: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result
+
+      assert.equal(result, false)
+    })
+
+    it('should return true if getTxOut() returns non-null output', async () => {
+      // Mock dependencies
+      sandbox.stub(bchjs.Utxo.blockchain, 'getTxOut').resolves({ a: 'b' })
+
+      const utxo = {
+        tx_hash: 'b94e1ff82eb5781f98296f0af2488ff06202f12ee92b0175963b8dba688d1b40',
+        tx_pos: 0
+      }
+
+      const result = await bchjs.Utxo.isValid(utxo)
+      // console.log('result: ', result
+
+      assert.equal(result, true)
+    })
+  })
 })