Welcome to Spellbook. Cast a magical incantation to tame the blockchain.

TL;DR

• Are you building something new? Please make sure to open a Draft PR, so we minimize duplicated work, and other wizards can help you if you need
• Don't know where to start? The docs below will guide you, but as a summary:
  • Want to make an incremental improvement to one of our spells? (add a new project, fix a bug you found), simply open a PR with your changes.
    • Follow the guide for Submitting a PR, Setting up your dev environment and Using dbt to write spells if you find yourself lost.
    • Not sure how to start? Follow the walkthrough here.
    • Make sure to open a draft PR if you will work on your spell for longer than a few days, to avoid duplicated work
  • Do you want to get started building spells and you don't know what to build? Check Issues to see what the community needs.
  • Check the Discussions section to see what problems the community is trying to solve (i.e. non-incremental changes) or propose your own!
• Have questions? Head over to #spellbook on our disccord and the community will be happy to help out!
• Looking for abstractions from the V1 engine? We moved them to dune-v1-abstractions.
• Like with most OSS projects, your contributions to Spellbook are your own IP, you can find more details in the Contributor License Agreement

Table of Contents

• Introduction
• How to contribute
  • Submitting a PR
  • Testing your Spell
  • Connecting with other wizards
• Setting up your dev environment
• Using dbt to write spells

Introduction

Spellbook is Dune's interpretation layer, built for and by the community. With Spellbook,

Spellbook is a dbt project. Each model is a simple SQL query with minor syntactic sugar (meant to capture dependencies and help build the resulting tables), and does a small part of the task of turning raw and decoded records into interpretable blockchain data.

Spellbook is built for and by the community, you are welcome to close any gaps that you find by sending a PR, creating issues to propose small changes or track bugs, or participate in discussions to help steer the future of this project.

Ways to contribute to Spellbook

• Build spells - if you want to write code, simply clone the repo, write your code, and open a PR
  • If you already know what to build, there's no red tape to skip around, simply open a PR when you're ready. We advice opening draft PRs early, so we avoid duplication of efforts and you can get help from other wizards
  • If you don't know where to start, check out Issues for ideas. We're always looking for help fixing small bugs or implementing spells for small projects
• Flag gaps in spellbook - have you found a bug, or is there a project missing from one of the sectors that you'd like to add? You can create an issue and bring other wizards to your aid.
  • Bugs: Found a record on a Spell that doesn't reflect chain data correctly? Please make sure you link to a block explorer showing the expected value, and a dune query showing the wrong value. If there's multiple records affected, any sense of scale (how many rows, affected USD volume) will also be very helpful.
• Propose changes to spellbook - Discussions are where we bring up, challenge and develop ideas to continue building spellbook. If you want to make a major change to a spell (e.g. major overhaul to a sector, launching a new sector, designing a new organic volume filter, etc.).

Submitting a PR

Want to get right to work? Follow the guide here to get started.

Testing your spell

You don't need a complex local setup to test spells against Dune's engine. Once you send a PR, our CI pipeline will run and test it, and, if the job finishes successfully, you'll be able to query the data your PR created directly from dune.com.

Simply write a query like you would for any of our live tables, and use the test schema to fetch the tables your PR created.

test_schema.git_{{commit_hash}}_{{table_name}}

You can find the exact names easily by looking at the logs from the dbt slim ci action, under dbt run initial model(s).

Please note: the test tables built in the CI pipeline will exist for ~24 hours. If your table doesn't exist, trigger the pipeline to run again and recreate the test table.

Connecting with other wizards

We use Discord to connect with our community. Head over to spellbook channel on Dune's Discord for questions or to ask for help with a particular PR. We encourage you to learn by doing, and leverage our vibrant community to help you get going.

Setting up your Local Dev Environment

Prerequisites

• Fork this repo and clone your fork locally. See Github's guide on contributing to projects.
• python 3.9 installed. Our recommendation is to follow the Hitchhiker's Guide to Python
• pip installed
• pipenv installed
• paths for both pip and pipenv are set (this should happen automatically but sometimes does not). If you run into issues like "pipenv: command not found", try troubleshooting with the pip or pipenv documentation.

Initial Installation

You can watch the video version of this if you scroll down a bit.

Navigate to the abstraction repo within your CLI (Command line interface).

cd user\directory\github\spellbook
# Change this to wherever spellbooks are stored locally on your machine.

Use the pipfile to create a pipenv.

pipenv install

If the env is created successfully, skip ahead to pipenv shell.

Our script is looking for a static python version, the likelihood of an error for a wrong python version is pretty high. If that error occurs, check your python version with:

py --version

Now use any text editor program to change the python version in the pipfile within the spellbook directory to your python version. You need to have at least python 3.9. If you have changed the python version in the pipfile, run pipenv install again.

You are now ready to activate this project's virtual environment. Use:

pipenv shell

You have now created a virtual environment for this project. You can read more about virtual environments here.

To initiate the dbt project run:

dbt init

Enter the values as shown below:

Which database would you like to use?
[1] databricks
[2] spark

(Don't see the one you want? https://docs.getdbt.com/docs/available-adapters)

Enter a number: 1
host (yourorg.databricks.com): .
http_path (HTTP Path): .
token (dapiXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX):
[1] use Unity Catalog
[2] not use Unity Catalog
Desired unity catalog option (enter a number): 2
schema (default schema that dbt will build objects in): wizard
threads (1 or more) [1]: 2

This will not connect to the database but you have access to some dbt actions. When you are prompted to choose a schema, please enter wizard so we know you are an external contributor. Should you make an error during this process (not entering wizard being the only one you can make), simply quit the CLI and start over.

To pull the dbt project dependencies run:

dbt deps

Then, run the following command:

dbt compile

dbt compile will compile the JINJA and SQL templated SQL into plain SQL which can be executed in the Dune UI. Your spellbook directory now has a folder named target containing plain SQL versions of all models in Dune. If you have made changes to the repo before completing all these actions, you can now be certain that at least the compile process works correctly, if there are big errors the compile process will not complete. If you haven't made changes to the directory beforehand, you can now start adding, editing, or deleting files within the repository. Afterwards, simply run dbt compile again once you are finished with your work in the directory and test the plain language sql queries on dune.com.

Coming back

If you have done this installation on your machine once, to get back into dbt, simply navigate to the spellbook repo, run pipenv shell, and you can run dbt compile again.

What did I just do?

You now have the ability to compile your dbt model statements and test statements into plain SQL. This allows you to test those queries on the usual dune.com environment and should therefore lead to a better experience while developing spells. Running the queries will immediately give you feedback on typos, logical errors, or mismatches. This in turn will help us deploy these spells faster and avoid any potential mistakes.

We are thinking about better solutions to make more dbt actions available directly but we also have to consider security.

How to use dbt to create spells

There are a couple of new concepts to consider when making spells in dbt. The most common ones wizards will encounter are refs, sources, freshness, and tests.

In the body of each query, tables are referred to either as refs, ex {{ ref('1inch_ethereum') }} or sources, ex {{ source('ethereum', 'traces') }}. Refs refer to other dbt models and they should refer to the file name like 1inch_ethereum.sql, even if the model itself is aliased. Sources refer to "raw" data or tables/views not generated by dbt. Using refs and sources allows us to automatically build dependency trees.

Sources and models are defined in schema.yml files where tests and other attributes are defined.

The best practice is to add tests unique and non_null tests to the primary key for every new model. Similarly, a freshness check should be added to every new source (although we will try not to re-test freshness if the source is used elsewhere).

Adding descriptions to tables and columns will help people find and use your tables.

models:
  - name: 1inch_ethereum
    description: "Trades on 1inch, a DEX aggregator"
    columns:
      - name: tx_hash
        description: "Table primary key: a transaction hash (tx_hash) is a unique identifier for a transaction."
        tests:
          - unique
          - not_null

  sources:
  - name: ethereum
    freshness:
      warn_after: { count: 12, period: hour }
      error_after: { count: 24, period: hour }
    tables:
      - name: traces
        loaded_at_field: block_time

See links to more docs on dbt below.

Generating and serving documentation:

To generate documentation and view it as a website, run the following commands:

• dbt docs generate
• dbt docs serve You must have set up dbt with dbt init but you don't need database credentials to run these commands.

See dbt docs documentation for more information on how to contribute to documentation.

As a preview, you can do things like:

• Write simple one or many line descriptions of models or columns.
• Write longer descriptions as code blocks using markdown.
• Link to other models in your descriptions.
• Add images / project logos from the repo into descriptions.
• Use HTML in your description.

Troubleshooting

If you fail to run dbt compile, here are some common error messages:

• Could not find profile named 'spellbook'
  Check ~/.dbt/profiles.yml and make sure there is a profile named spellbook. When you run dbt init to initiate a project, a profile gets created. Inside spellbook you cannot initiate a project called the same name, so you need to run dbt init spellbook outside the project so it creates the profile, or create one with a different name and then manually edit the profiles.yml file.

• Credentials in profile "spellbook", target "dev" invalid: Runtime Error
   http connection method requires additional dependencies.
   Install the additional required dependencies with pip install dbt-spark[PyHive]

  You've probably selected the spark option instead of the databricks option when running dbt init. Rerun dbt init, overwrite the profile, and select the databricks option.

DBT Resources:

• Learn more about dbt in the docs
• Check out Discourse for commonly asked questions and answers
• Join the chat on Slack for live discussions and support
• Find dbt events near you
• Check out the blog for the latest news on dbt's development and best practices