How to calculate the running balance of an asset based on INPUT and OUTPUT

Question

I'm looking at different blockchain transactions and wanted to create a running balance of a given asset based on INPUT_ADDRESS (the address sending the currency) INPUT_AMOUNT (the amount being sent by an INPUT_ADDRESS), OUTPUT_ADDRESS (the address receiving the currency) and OUTPUT_AMOUNT (the amount being received by an OUTPUT_ADDRESS)

Here's a sample of a table I'm using:

BLOCK_DATE | BLOCK_HEIGHT | TRANS_HASH | INPUT_ADDRESS | OUTPUT_ADDRESS | INPUT_AMOUNT | OUTPUT_AMOUNT
01/11/2020    190            15c7853       abc             xyz1             -0.01          0.0001
01/11/2020    190            14v9876       abc             xyz2             -0.50          0.70
01/11/2020    191            19vc842       abc             xyz3             -5.03          0.413
01/12/2020    192            20ff4d3       abc             xyz4             -0.06          0.201
01/12/2020    192            154gf34       xyz1            abc              -0.07          0.18
01/12/2020    192            45f4ti5       ggg             abc              -0.10          0.24
01/12/2020    192            33cv5c5       jjj             abc              -0.08          1.13 

If I were to calculate a running sum of address abc , what's an efficient way of going about this? I tried using something like:

SELECT BLOCK_DATE, BLOCK_HEIGHT, TRANS_HASH, INPUT_ADDRESS, OUTPUT_ADDRESS, INPUT_AMOUNT, OUTPUT_AMOUNT, SUM (INPUT_AMOUNT) OVER (ORDER BY DATE) AS RunningAgeTotal
FROM TRANSACTION_TABLE
WHERE INPUT_ADDRESS = abc

In this particular example, the total balance for abc would be the sum of OUTPUT_AMOUNT where abc is the OUTPUT_ADDRESS (ie 0.18 + 0.24 + 1.13) + the sum of INPUT_AMOUNT where abc is the INPUT_ADDRESS (ie -0.01 + -0.50 + -5.03 + -0.06). So, 1.55 + (-5.60) = -4.05

But I don't think this is the right way of going about this and I'm not sure how to account for the OUTPUT_AMOUNT (eg when abc receives is an OUTPUT_ADDRESS and receives an OUTPUT_AMOUNT)

Answer 1

Is this what you want?

select t.*,
       sum(case when input_address = 'ABC' then input_amount
                when output_address = 'ABC' then output_amount
           end) over (order by block_date) as running_amount
from transaction_table t
where 'ABC' in (input_address, output_address);

This is a cumulative sum of the amounts aligned with the input/output columns.

EDIT:

You may want:

       sum(case when input_address = 'ABC' then input_amount
                when output_address = 'ABC' then output_amount
           end) over (order by block_date, block_height) as running_amount