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5a9952c7b4
- the spec says response to getBlockHashes(from, max) should return all hashes starting from PARENT of from. This required major changes and results in much hackier code. - Introduced a first round block request after peer introduces with current head, so that hashes can be linked to the head - peerInfo records currentBlockHash, currentBlock, parentHash and headSection - AddBlockHashes checks header section and creates the top node from the peerInfo of the best peer - AddBlock checks peerInfo and updates the block there rather than in a node - request further hashes once a section is created but then no more until the root block is found (so that we know when to stop asking) - in processSection, when root node is checked and receives a block, we need to check if the section has a parent known to blockchain or blockPool - when peers are switched, new peer launches a new requestHeadSection loop or activates its actual head section, i.e., the section for it currentBlockHash - all tests pass