Todo

[AustEcon]

• Add simple-indexer to SDK
• Add simple-indexer to ElectrumSV CI/CD
• Add block height to pushdata filter matching response
• Add binary protocol to pushdata filter matching response (see https://github.com/electrumsv/electrumsv/blob/features/indexer-support/electrumsv/network_support/general_api.py)
• bitcoinx.Headers to tracking sync state - two sets one for node tip and one for indexer tip
• chain synchronization loop that starts at genesis and goes til == node tip then waits on zmq notifications for the new tip
• invalidate mempool tx cache entries on_block
• blocks table for convenience of serving queries
• Define an API for obtaining arbitrary transactions and merkle proofs.
• Define an API for obtaining restoration data.
• ElectrumSV support for restoration services.