Some tasks are difficult to perform by interacting directly with the blockchain. For example getting the list of transactions emitted and received by an account. The indexer is a piece of software that makes these tasks way easier for the clients. We aim to have about 3-4 indexers for each country using Ğ1 to provide enough redundancy in case some of them fail.
- duniter forum section https://forum.duniter.org/c/dev/indexers/66
There are multiple indexer software with different strategy and different targets: