feat: implement 'block header cbor by block hash' reducer with new 'filter_matches_block!' macro #70
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Implements a block-focused reducer, which uses a new
filter_matches_block!macro that can be used to match blocks for which any of the contained transactions satisfy the given predicates.For example one may wish to store the block hash and block header of blocks which contain transactions which send funds to or from a particular address, perhaps to see when those transactions occurred using the block height.
Key: block hash
Value: block header in raw CBOR