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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
You could try ethstaker.tax I believe the csv that can be downloaded gives the earnings for end of each day. This service treats it as income as soon as its credited to the validator, the actual withdrawal to your wallet isn't considered, which may or may not be the approach you want to take
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