chaincfg: Add checkpoints for upcoming release.

[davecgh]

This adds checkpoints at the following heights:

mainnet:

• 237310
• 277940
• 318020
• 340120
• 362120
• 404170
• 424170
• 444170
• 464170
• 483600

testnet:

• 148320
• 213120
• 347140
• 411940
• 476740
• 515730

Note that this also includes some historical checkpoints to limit the size of the gaps between each checkpoint to be around 3 months max. This is being done because recent optimizations have sped up processing to the point that larger gaps can trigger peers to get banned during IBD in some cases.

[davecgh]

$ for height in 237310 277940 318020 340120 362120 404170 424170 444170 464170 483600; do hash=$(dcrctl getblockhash $height); echo "height: $height, hash: $hash"; done
height: 237310, hash: 000000000000000a6815e366425acd30354dfdcb55f401e38b037e87ca00f171
height: 277940, hash: 000000000000000043b47c777bc96760e6fccc872cc8edb295b230dd8dd0f5d7
height: 318020, hash: 00000000000000002765c601fe4455126ab27913fcc2d2db28f78e1e6bb77266
height: 340120, hash: 00000000000000001a9ba30acfd8272aa1514ce7979fc508118ee3764a19df46
height: 362120, hash: 00000000000000000219580063387071893bcd0992cacb5f0aa55fc9e6c4a0ab
height: 404170, hash: 000000000000000010352022d88733bac2665c882030db071ce5ea29970fefd8
height: 424170, hash: 00000000000000000b8526a9fdd31fcb249c992fc0741d422528ce2fa975bbd0
height: 444170, hash: 00000000000000000673a109a997e8ca41bc4ece86445bc89c1bb2b9921633cc
height: 464170, hash: 0000000000000000063c4588ffa1ff25978c025eaf529f39bcbad8b962502f65
height: 483600, hash: 000000000000000010f98f7354b501b5747011c82d53b989dbcb368e5059ff9e

$ for height in 148320 213120 347140 411940 476740 515730; do hash=$(dcrctl --testnet getblockhash $height); echo "height: $height, hash: $hash"; done
height: 148320, hash: 0000000003535b80e4b759b8ec1790f81f429d9f5a810eda43c3afb64d9760b1
height: 213120, hash: 000000000009bb6909db742278f3ab7c9169ef396068cce7f750b587b72738af
height: 347140, hash: 0000001638f00f197b882a00db04d1323e205f45bf1108e4f1bbc1f456d4250c
height: 411940, hash: 00000012b6d21f31f18a2f6d8b64e111327f011ac13a1b3e9d0d8b477f71f62b
height: 476740, hash: 00000005635a4b783ad4d85e0cb92f094e2e885a92ef4d6b8464b22a02646279
height: 515730, hash: 00000010ecddf8da5d91f7020f69130db8a163906d460cbbed2a91568701f0ac

[degeri]

Matches

$ for height in 237310 277940 318020 340120 362120 404170 424170 444170 464170 483600; do hash=$(dcrctl getblockhash $height); echo "height: $height, hash: $hash"; done
height: 237310, hash: 000000000000000a6815e366425acd30354dfdcb55f401e38b037e87ca00f171
height: 277940, hash: 000000000000000043b47c777bc96760e6fccc872cc8edb295b230dd8dd0f5d7
height: 318020, hash: 00000000000000002765c601fe4455126ab27913fcc2d2db28f78e1e6bb77266
height: 340120, hash: 00000000000000001a9ba30acfd8272aa1514ce7979fc508118ee3764a19df46
height: 362120, hash: 00000000000000000219580063387071893bcd0992cacb5f0aa55fc9e6c4a0ab
height: 404170, hash: 000000000000000010352022d88733bac2665c882030db071ce5ea29970fefd8
height: 424170, hash: 00000000000000000b8526a9fdd31fcb249c992fc0741d422528ce2fa975bbd0
height: 444170, hash: 00000000000000000673a109a997e8ca41bc4ece86445bc89c1bb2b9921633cc
height: 464170, hash: 0000000000000000063c4588ffa1ff25978c025eaf529f39bcbad8b962502f65
height: 483600, hash: 000000000000000010f98f7354b501b5747011c82d53b989dbcb368e5059ff9e

$ for height in 148320 213120 347140 411940 476740 515730; do hash=$(dcrctl --testnet getblockhash $height); echo "height: $height, hash: $hash"; done
height: 148320, hash: 0000000003535b80e4b759b8ec1790f81f429d9f5a810eda43c3afb64d9760b1
height: 213120, hash: 000000000009bb6909db742278f3ab7c9169ef396068cce7f750b587b72738af
height: 347140, hash: 0000001638f00f197b882a00db04d1323e205f45bf1108e4f1bbc1f456d4250c
height: 411940, hash: 00000012b6d21f31f18a2f6d8b64e111327f011ac13a1b3e9d0d8b477f71f62b
height: 476740, hash: 00000005635a4b783ad4d85e0cb92f094e2e885a92ef4d6b8464b22a02646279
height: 515730, hash: 00000010ecddf8da5d91f7020f69130db8a163906d460cbbed2a91568701f0ac

[matheusd]

Verified. Also checked those were in fact checkpoint candidates as returned by IsCheckpointCandidate().

[davecgh]

@matheusd Thanks for also verifying via IsCheckpointCandidate(). I did as well before creating the PR. I probably should've called that out.

[jrick]

matches

[jholdstock]

LGTM - same output as everybody else