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Davi Ortega for DDX-Project

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DDX stands for Distribute Database of Anything. It is an experimental project that uses the Open Index Protocol (OIP) to read and write the metadata of real-world records to the FLO blockchain.

The major goal is to build a truly public digital space on the internet that is affordable, secure, and accessible.

It is in its infancy but also under heavy development by the Jensen Lab at Caltech and Alexandria Labs.


Let's chat about some of the jargons we will use for herein:


We call records any metadata of a real-world data or thing. For example, if you have a cat, then you can make a record of your cat. For example:

  name: "Sophie",
  description: "Short hair, indoor",
  dataOfBirth: 2012
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that is what we call a record of Sophie as a cat in the OIP context. It is the metadata about Sophie.

Record Templates

As in most projects aiming to become a repository of data, DDX has a way to organize information. We call it record templates. These record templates are basically the metadata schema of a particular type of data. For example, a schema for records of the type cat would be:

  name: "string",
  description: "string",
  dateOfBirth: "date"
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It basically defines the fields of the records of type cat and explains what type of data should be in it.

Open Index Protocol (OIP)

oip logo

The ideas of records and record templates are the building blocks of DDX. In the DDX ecosystem, this information is stored in the FLO blockchain using the Open Index Protocol.

The OIP defines how we write records and record templates to the blockchain. It also refines how we read them.

In another post we will go through it in more detail, but for now, OIP uses a mix of encoders (including Google's protobuf to serialize data and add to the FLO blockchain.

This task of adding information to the blockchain is facilitated by the FLO data field called floData.

flo logo

The FLO blockchain is a OG blockchain launched in 2013 with no ICO, no pre-mining and remains active to this day.

alexandria logo

The Alexandria Labs built a daemon that monitor the FLO blockchain for transactions with floData that follows the OIP standards and dynamically builds an ElasticSearch instance with the records according to the record templates it finds.

alexandria logo

The daemon also exposes a REST API so the content of the database can be easily searchable.

The Alexandria team keep a public instance of this REST API at

And documentation on how to query it can be found here:


Now that we defined the basics, let's wrap it up.

Think of DDX as a database of anything and each record template as the schema of a table in this database.

If we want to add a new "table" on DDX, all we need to do is to follow these 3 simple steps:

1- Define a schema
2- Encode following the Open Index Protocol standard
3- Broadcast it to the FLO blockchain

To add a record in this new table all we need to do is to follow another 3 simple steps:

1- Build a record with the metadata according the schema defined by the template
2- Encode it following the Open Index Protocol standards
3- Broadcast it to the FLO blockchain

We are working on supporting software to facilitate these steps and how to perform them will be the subject of the next posts.

Some of the code can be found here:


We are also working on a series of gateways to facilitate the interaction of humans and this data: the DDX-gateways. They are client-side static react apps that use public API to read and write data on the blockchain.

There are two of them online now:

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Final remarks

This was a very brief kick-off overview of the DDX-project and how it leverages the OIP and FLO blockchain to build a persistent, truly public, digital space on the Internet.

Stay tuned for the next posts!

☀️ + ⚜️ = 🚀🚀🚀

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