block data on blockcypher for 824221

[0xB10C]

The blockcypher.com API has full block data for the following missing blocks:

• 878195 0000000000000000000118ba6ca352890cb4c6a87f7370ee2fafa73985fdcbea added in add: 878195 block file #42

• 824221 00000000000000000003a0653dbab14cc0f6fef121442b29d6b4005cdcdbc0d5

{
  "hash": "00000000000000000003a0653dbab14cc0f6fef121442b29d6b4005cdcdbc0d5",
  "height": 824221,
  "chain": "BTC.main",
  "total": 570437004732,
  "fees": 70869367,
  "size": 1954206,
  "vsize": 999631,
  "ver": 543162368,
  "time": "2024-01-03T23:19:20Z",
  "received_time": "2024-01-03T23:30:19.836Z",
  "relayed_by": "46.101.112.24:8333",
  "bits": 386132147,
  "nonce": 1863689768,
  "n_tx": 3340,
  "prev_block": "0000000000000000000102dca3d35ee8fa512fdc844301abca6296f1119503a1",
  "mrkl_root": "41ca5a2a4eff1b3187ac48eacf6c3d42a886785a9fdd4603e66119ce6f1eed6a",
  "txids": [
    "0db594be5cdc431610113709636491dc8509bdc5f531f97266efa4cd4efe4879",
    "fd692e12f493597b004ccd28707e684c66fc23c4bb2b856e577b23a4121bd838",
    "d7db532185fed70074cf81e6c1f7c3671e80da66430d44e8228d878ef7f902e1",
    "0ecdae245a63332c0e10eee6907caaaf31cd680222d6f0722021a8cacc7d936e",
    "3257be6bad8d90d6ff2d04c6528e241138a4f6a8ba1d55525c53f994edae34fe",
    "28b6ee52e3779a3dc93e17c22ac94e533a012411f58583269fd8a47aec8719c7",
    "0066bcedca0d19a3562ea0827634db258ca5b32780c72e662cfff8dbc355dcb5",
    "25df4b1afc41aa086aedd9748226f8613f9d1e76c8a4721d6c44aacdee6ad624",
    "a567d305be9ab1ebf697313dfc0e751efe71f3eac9d88a1a3327e2e619580016",
    "ca844fe3644ed5e993bfd06d4b821060efcf33b66914206cb6f8430944244ecc",
    "cd7d32ff015ec46d311af3239ece9eac14643a6164b1ba075b53035c79bb0cb6",
    "10823dadbfd96b3aea120d27d22f33535de29ec2e952a3efc56daaca06ca7475",
    "206746f730778fbd69a4bbb7ae6e9cdd8d3d539f4def5a944e9fadcfd277fea4",
    "aeb8f688e34731a7cc19289408a4fcabe704f56539545e646bf9b996014fdf44",
    "3240a24aa3c9cca52fb1d720f88906fb7a71bcdebe35b34c3671437c0f4621c2",
    "b46ccafe59fab5255b5569836e2dabf4ea8ff42e4522afcc0c4e2041c4c7258d",
    "12565ef3ad891371b2814e7161843260711e97920dcaff6ff8e7f4ee57b49ec1",
    "9e16fefe85b120ce06369a142f6a0583dfd5e6b7c09d965d68730838b3be374f",
    "39dfd1bbded973657cd9e992275d2a139bd12bb7b18a2272b355d8ae5a82f34a",
    "ef1acbcc04b8808d914cf51381e637e10ad2cfbc0a9b01c9660d4a2c16ad2019"
  ],
  "depth": 88050,
  "prev_block_url": "https://api.blockcypher.com/v1/btc/main/blocks/0000000000000000000102dca3d35ee8fa512fdc844301abca6296f1119503a1",
  "tx_url": "https://api.blockcypher.com/v1/btc/main/txs/",
  "next_txids": "https://api.blockcypher.com/v1/btc/main/blocks/00000000000000000003a0653dbab14cc0f6fef121442b29d6b4005cdcdbc0d5?txstart=20\u0026limit=20"
}

However, the API doesn't offer an endpoint for raw blocks. With the list of transactions, the blocks can possibly be reconstructed...

[ajtowns]

Process for reconstructing from blockcypher data:

# get the block and tx info
$ https://api.blockcypher.com/v1/btc/main/blocks/$BLK?txstart=0\&limit=500 > BLOCK.0
$ for a in $(seq 500 500 $(jq < BLOCK.0 .n_tx); do https://api.blockcypher.com/v1/btc/main/blocks/$BLK?txstart=$a\&limit=500 > BLOCK.$a; done
$ for a in BLOCK.0 BLOCK.500 BLOCK.??00; do [ -e "$a" ] || continue; jq < $a -r '.txids | .[]'; done | while read a; do echo $a $(bitcoin-cli getrawtransaction $a); done > BLOCK-ALLTXS
$ cat BLOCK-ALLTXS | while read txid hex; do if [ "$hex" = ""]; then hex=$(curl //api.blockcypher.com/v1/btc/main/txs/$txid?includeHex=true | jq .hex); fi; echo $txid $hex; done > BLOCK-ALLTXS2

$ -- from BLOCK.0 convert "ver", "prev_block", "mrkl_root", "time", "bits", "nonce" to little endian header encoding
$ -- from BLOCK.0 convert "n_tx" to compact size encoding
$ cat BLOCK-ALLTXS2 | cut -d' ' -f2 # to get hex txs
$ -- combine them all and run submitblock

cf #43