Taz is a tool for analyzing and reporting on your Tezos transactions.

Taz does three things to help analyze your Tezos transactions.

1. Collect: It downloads transactions and other data needed for processing.
2. Classify: It analyzes and classifies your transactions within and across accounts.
3. Collate: It gathers, sorts, and further classifies all transactions.

From these three things, Taz is also able to help automate creating CSV reports like income statements and gains and losses reports.

Disclaimer: Taz is not a replacement for professional financial or tax advice. Code and documentation are provided for informational purposes; use at your own risk.

Taz is a work in progress. I created this based on my own usage, but Tezos is a big place, with lots of different interaction patterns. If something doesn't look right (or you get errors when running it), feel free to open an issue or suggest code changes via PR. It is my goal to support as much of the Tezos blockchain as I can.

Current areas of known limitation:

1. DeFi. Outsize of simple XTZ-token swaps, Taz most likely does not properly classify/analyze DeFi transactions like liquidity, staking, etc. This is my highest priority area to improve.
2. NFT platforms I haven't used. Some should work but I haven't directly tested all.
3. Custom constracts. Taz has a rudimentary plugin system for special case handling of contracts, but with almost 100k contracts on Tezos, there is lots of room for improvement.
4. Unknown unknowns. 👽

1. Make sure you have Node.js installed (tested on v16.14.0). Installation Instructions
2. Clone/download repository. GitHub Help
3. Install node dependencies by opening a terminal application, navigating to the directory where you cloned the repository, and running npm install.

To configure Taz for your data:

1. Copy the .env.sample file to a file named .env. This is where Taz reads configuration information.
2. Set the variables in .env

Once you have done this, you can run Taz to see its output, but the analysis will be wrong unless you create your exchange CSV files.

Taz currently supports the currencies that TzKT does.

• Btc
• Cny
• Eth
• Eur
• Gbp
• Jpy
• Krw
• Usd

Taz does not automatically download centralized exchange data (yet), so you will have to create this manually for accurate analysis.

You can find an sample CSV in the examples folder that contains each type of transaction currently supported. For accurate analysis, you must include all transactions that involve XTZ. For instance if you receive BTC and then trade it for XTZ, you must include the transaction where you receive BTC. You can include transactions for other cryptocurrencies but Taz will ignore them.

The easiest way to create this CSV is to copy the sample CSV and replace the example transactions with your own. Once you have finished your CSV put it in the appropriate year's user folder (creating if needed).

Example folder structure:

• data
  • 2021
    • user
      • exchange-transactions.csv

These headers must be in your CSV.

• timestamp: ISO 8601 timestamp of transaction
• type: type of transaction
• fiat: price in fiat per coin. This must be present for receive, trade, interest, trade:fiat-in, and trade:fiat-out types.
• in_amt: amount for incoming transcation
• in_token: token symbol for incoming transaction (eg, XTZ)
• in_token_id: token id for incoming transaction (not used currently)
• in_token_from: source of incoming transaction (use your address when transferring to a centralized exchange)
• out_amt: amount for outgoing transaction
• out_token: token symbol for outgoing transaction (eg, XTZ)
• out_token_id: token id for outgoing transaction (not used currently)
• out_token_to: destination of outgoing transaction (use your own address when transferring to yourself)
• fees: fee for transaction. Include for outgoing transfer types.
• account: account for transaction. You can use the name of your exchange if you like.
• op: operation hash for transaction. You must include this for transfer types. Most exchanges will give you this information, but you might need to find it on a blockchain explorer like TzKT if not.

Taz supports the following transaction types in the exchange CSV.

• transfer: for sending or receiving tez to or from one of your addresses. fiat is not needed.
• receive: for receiving any cryptocurrency from an address that is not yours. fiat is price per coin of incoming token.
• trade: trading cryptocurrency for cryptocurrency. fiat is price per coin of outgoing token.
• trade:fiat-out: trading fiat for cryptocurrency. fiat is price per coin of incoming token.
• trade:fiat-in: trading cryptocurrency for fiat. fiat is price per coin of outgoing token.
• interest: cryptocurrency received from exchange for holding (usually this is a staking reward of some kind). fiat is price per coin of incoming token.

For incoming and outgoing transfer types, make sure to include the operation hash in the op column so that Taz can match it correctly with the corresponding blockchain transaction.

Taz uses the fiat column to calculate cost basis and income. Here is how to set it, based on type:

• receive: price per coin for in_token
• interest: price per coin for in_token
• trade: price per coin for out_token
• trade:fiat-out: price per coin of in_token
• trade:fiat-in: price per coin of out_token
• transfer: not needed

Now that you have configured Taz and created your exchange CSV, you are now ready to download your blockchain data and look at how Taz analyzes it! 🎉

Simple run node index.js in Taz's directory. Depending on how many transactions you have it can take some time to download, but once Taz finishes, you should see data in your year folders (under data).

If you run into problems, feel free to let me know by opening an issue.

Currently, Taz creates the following reports (found in the reports folder for a given year, eg data/2021/reports/):

• gains-FIFO.csv: a FIFO report of gains and losses
• gains-HIFO.csv: a HIFO report of gains and losses
• income.csv: an income statement
• all-classified-transactions.csv: a collated report of how Taz classified all of your transactions
• individual classification reports for each address you configure

The most helpful way to contribute at the moment is to setup Taz, run it, and let me know if you experience errors or data that looks/is wrong. I also welcome code contributions, if you're willing to jump into a young code base. All code is MIT licensed.