A Chrome Extension Wallet for the Neo Smart Economy
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This is a Chrome extension wallet for the Neo Smart Economy.

Currently the project is undergoing heavy development and is hardcoded to only operate on TestNet.


Current Features

  • Open a wallet using an encyrpted WIF
  • Get a list of transactions for any known address - does not require login
  • Get the balance of any known address - does not require login
  • Send Neo or Gas to an address
  • Test invoke smart contracts, with parameters, to determine gas cost and test
  • Send invoke smart contracts with parameters and arguments
  • Authorize both types of smart contract invocations as requested by third-party dApp
  • SemVer 2.0 compliant http://semver.org/

Future Features

  • Easy selection of MainNet, TestNet, or custom private net
  • Contact book that remembers addresses used
  • Configurable watch wallet for any saved addresses to display balances all in one view
  • Create wallet
  • Import Wallet
  • Export Wallet
  • Ledger hardware support
  • Any ideas from the community!


yarn install

yarn run start # (for development with live reload)

yarn run build # (production)

Your unpacked extension will be in the ./build/ folder.

See https://developer.chrome.com/extensions/getstarted#unpacked for instructions on manually loading an unpacked Chrome extension in developer mode.

Use NeoLink with your dApp

Add the following code to your dApp:

<input type='text' id='contractScriptHash' />
<input type='text' id='operationName' />
<input type='text' id='runInvokeArgument1' />
<input type='text' id='runInvokeArgument2' />
<input type='text' id='assetType' />
<input type='text' id='assetAmount' />

<button id="runInvokeButton">Invoke</button>
    function() {
      var scriptHash = document.getElementById("contractScriptHash").value
      var operation = document.getElementById("operationName").value
      var invokeArg1 = document.getElementById("runInvokeArgument1").value
      var invokeArg2 = document.getElementById("runInvokeArgument2").value
      var type = document.getElementById("assetType").value
      var amount = document.getElementById("assetAmount").value

      var invocationObject = {
        'scriptHash': scriptHash,
        'operation': operation,
        'arg1': invokeArg1,
        'arg2': invokeArg2,
        'assetType': type,
        'assetAmount': amount
      window.postMessage({ type: "FROM_PAGE", text: invocationObject }, "*");
}, false);

Please note that currently the code is limited to a maximum of three arguments to the smart contract.

TODO: add arbritrary number of arguments

Triggering an IoT Smart Contract Payment


Python command line: (must be synced to TestNet)

testinvoke b3a14d99a3fb6646c78bf2f4e2f25a7964d2956a putvalue ['test','0000ff'] --attach-gas=0.00025


  • Install NeoLink
    • Clone github.com/cityofzion/neolink/
    • Follow the instructions there to install and build
    • Login with encrypted WIF (wallet needs a balance of TestNet gas)
  • Login to iot.splyse.tech
  • Locate contract with name 'test' in the list of Devices
  • Enter a color code hex value in the form of '00ff00' (without quotes) into the input field
  • Click pay
  • If you are logged into your NeoLink wallet you will see a message in the web page asking you to open NeoLink and authorize the transaction.
  • Open NeoLink and click the 'yes' button to authorize the transaction.