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(WIP) AuxPoW: Use cp_height for checkpoints #165

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(WIP) AuxPoW: Use cp_height for checkpoints #165

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AuxPoW port of spesmilo#5147

Do not merge this until the upstream PR is merged and this PR is rebased accordingly.

@JeremyRand JeremyRand force-pushed the auxpow-cp-height-checkpoints branch 2 times, most recently from 881285a to 5b99b38 Compare August 24, 2019 04:46
@JeremyRand JeremyRand mentioned this pull request Sep 20, 2019
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JeremyRand and others added 13 commits November 5, 2019 08:56
@JeremyRand
Use cp_height for checkpoints.
59670d7 
This is a rough port of abf12b6 by
rt121212121 from Electron-Cash.

Cherry-picked from c3399e0.
@JeremyRand
Add test for blockchain.get_chainwork
d76b8e7 
Cherry-picked from 4291828.
@JeremyRand
Add timestamp and chainwork to checkpoint
8882423
@JeremyRand
Eliminate obsolete special case from request_chunk
ceacede
@JeremyRand
Test get_chainwork with a variety of checkpoint heights
97fd7d2
@JeremyRand
Add bits to checkpoint
f98f365
@JeremyRand
Refactor cp_height checkpoints' usage of header parsing
9246429 
This makes it easier for Electrum forks to support alternate header
formats such as AuxPoW.

Cherry-picked from 2d2adb7.

Conflicts:
	electrum/blockchain.py
@JeremyRand
Add prev_hash to cp_height checkpoint logic
5f7fd05
@JeremyRand
Load cp_height checkpoints from JSON file instead of constants.py
aef4d8f
@JeremyRand
Use verifier.py's hash_merkle_root for checkpoints
629b1b6 
Move hash_merkle_root to blockchain.py to avoid circular imports.
@JeremyRand
(WIP) Namecoin / AuxPoW: Adapt cp_height checkpoints for AuxPoW
ea82537 
TODO: Needs rebase once cp_height merged upstream.

Based on:

e69fbd8
98c4936
b34bfa6
a9b43ba
bca0ded
7db5c69
55b85d9
14ea0aa
16fe405
b997b13
@JeremyRand
(WIP) Namecoin / AuxPoW: Fix get_block_header parsing for cp_height
41bda45 
TODO: Needs rebase once cp_height merged upstream.
@JeremyRand
(WIP) Namecoin / AuxPoW: Fix checkpoint exporting
cf81d2b 
TODO: Needs rebase once cp_height merged upstream.
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