Foundations of Blockchain

Interface for the application

The NEO community has a created few JavaScript libraries to interface with the NEO blockchain. We will be using a popular library called neon-js (https://github.com/CityOfZion/neon-js), which is backed by the City of Zion community.

The following script creates an interface to query the owner of the asset for our proof of ownership application:

queryAsset(assetID) {
  const props = { 
    scriptHash: '60a7ed582c6885addf1f9bec7e413d01abe54f1a', 
    operation: 'query', 
    args: [assetID.hexEncode()]
  }; 
  const Script = Neon.create.script(props); 
 
  rpc.Query.invokeScript(Script).execute('http://localhost:30333') .then((res) => { 
    return res.result.stack[0].value.hexDecode() 
  }); 
} 

The interface created using the neon-js library builds ...