Что такое SyncCheckpoint на протоколе NEAR?
В документации крейта Near_primitives SyncCheckpoint — это вариант типа BlockReference .
pub enum BlockReference {
BlockId(BlockId),
Finality(Finality),
SyncCheckpoint(SyncCheckpoint),
}
Перечисление SyncCheckpoint имеет два варианта: Genesis и EarliestAvailable .
pub enum SyncCheckpoint {
Genesis,
EarliestAvailable,
}
Выполнение запроса curl к узлу RPC (rpc.mainnet.near.org) с помощью SyncCheckpoint::Genesis возвращает данные блока:
Запрос:
curl 'https://rpc.mainnet.near.org' -d '{"jsonrpc": "2.0", "id": "dontcare","method":"block", "params":{"sync_checkpoint":"genesis"}}' --header "Content-Type: application/json"
Ответ:
{
"jsonrpc": "2.0",
"result": {
"author": "nfvalidator1.near",
"header": {
"height": 9820210,
"prev_height": null,
"epoch_id": "11111111111111111111111111111111",
"next_epoch_id": "11111111111111111111111111111111",
"hash": "EPnLgE7iEq9s7yTkos96M3cWymH5avBAPm3qx3NXqR8H",
"prev_hash": "11111111111111111111111111111111",
"prev_state_root": "5o1trt9N9YgDL4xeY33z9adS5Ub3jMmuyQpWM7UHowrq",
"chunk_receipts_root": "7tkzFg8RHBmMw1ncRJZCCZAizgq4rwCftTKYLce8RU8t",
"chunk_headers_root": "B721Q29qvCCbUc8cDa8ET9fjSPHPtrVw9HGFr3Q6jXxQ",
"chunk_tx_root": "7tkzFg8RHBmMw1ncRJZCCZAizgq4rwCftTKYLce8RU8t",
"outcome_root": "11111111111111111111111111111111",
"chunks_included": 0,
"challenges_root": "11111111111111111111111111111111",
"timestamp": 1595350551591948000,
"timestamp_nanosec": "1595350551591948000",
"random_value": "11111111111111111111111111111111",
"validator_proposals": [],
"chunk_mask": [],
"gas_price": "1000000000",
"block_ordinal": null,
"rent_paid": "0",
"validator_reward": "0",
"total_supply": "999999999792372916156395166000000",
"challenges_result": [],
"last_final_block": "11111111111111111111111111111111",
"last_ds_final_block": "11111111111111111111111111111111",
"next_bp_hash": "C4121SKfZh1MC38ukZaxHsEXNYrBbqAk77P7yLmQffs5",
"block_merkle_root": "11111111111111111111111111111111",
"epoch_sync_data_hash": null,
"approvals": [],
"signature": "ed25519:1111111111111111111111111111111111111111111111111111111111111111",
"latest_protocol_version": 29
},
"chunks": [
{
"chunk_hash": "CUc7UcYGcXwu5Y6UqEkkS6UbffHN4NNHhh5XLRHV8kLu",
"prev_block_hash": "11111111111111111111111111111111",
"outcome_root": "11111111111111111111111111111111",
"prev_state_root": "8EhZRfDTYujfZoUZtZ3eSMB9gJyFo5zjscR12dEcaxGU",
"encoded_merkle_root": "3HH1fYqnCGMx2ZmL4sLcTuu2Yovg1r6KjNrPtgBATHgu",
"encoded_length": 8,
"height_created": 9820210,
"height_included": 9820210,
"shard_id": 0,
"gas_used": 0,
"gas_limit": 1000000000000000,
"rent_paid": "0",
"validator_reward": "0",
"balance_burnt": "0",
"outgoing_receipts_root": "11111111111111111111111111111111",
"tx_root": "11111111111111111111111111111111",
"validator_proposals": [],
"signature": "ed25519:1111111111111111111111111111111111111111111111111111111111111111"
}
]
},
"id": "dontcare"
}
Являются ли возвращаемые данные первой SyncCheckpoint со времен Genesis или чем-то еще?
Аналогичным образом, выполнение запроса curl к узлу RPC с помощью SyncCheckpoint::EarliestAvailable возвращает изменяющиеся данные, аналогичные приведенным ниже (возвращаемые данные со временем меняются):
Запрос:
curl 'https://rpc.mainnet.near.org' -d '{"jsonrpc": "2.0", "id": "dontcare","method":"block", "params":{"sync_checkpoint":"earliest_available"}}' --header "Content-Type: application/json"
Ответ:
{
"jsonrpc": "2.0",
"result": {
"author": "aurora.pool.near",
"header": {
"height": 61106578,
"prev_height": 61106577,
"epoch_id": "DMysmTQb5Jbisug4AYcQXEukRecMwMVGW5cCSYhVhaFV",
"next_epoch_id": "9dZCzgdMnpJuDHyb8axCdQU48gVzFhYQkSKPo81kN2Lq",
"hash": "FdHsgwG15MaRKHfzS8cGhVXcCWnGAqWLJTBhDwsvW3Ku",
"prev_hash": "3wFXoS21Jd8SxT4sCoTJF7vSzRn8e2pDdsN4zkuWifK7",
"prev_state_root": "D9Z7qEEdGQnwuoniKXp6ZF7HNV9tE83nnHJM7A7tjGLH",
"chunk_receipts_root": "CSJU86WCJ56Dhc4FMoRZJ25CtddryihTHT8u9W5hCNCv",
"chunk_headers_root": "CUAR7BFiE37seBEwB4w6KvCm1vitPDcB1FXWgz8jQUeq",
"chunk_tx_root": "BxKLsJAudBrECUJiheKMnBvVM6nwRt4wzk7yVmLMYtwu",
"outcome_root": "Hm7oRCdM7BcsAqaDMdv26Ht1KFXkgUMjmnssPAZbfQsY",
"chunks_included": 4,
"challenges_root": "11111111111111111111111111111111",
"timestamp": 1646867512768569032,
"timestamp_nanosec": "1646867512768569032",
"random_value": "Cm59J4gwt3GzwRz5N2YdcWGSFcTcTKyKbkVcg3EW3N8E",
"validator_proposals": [],
"chunk_mask": [true, true, true, true],
"gas_price": "100000000",
"block_ordinal": 51125139,
"rent_paid": "0",
"validator_reward": "0",
"total_supply": "1070231764829171540584041010099639",
"challenges_result": [],
"last_final_block": "tMT4kQ9c3R3Hp7tozV3ySyPRheDzvUkxLcwPCga1WWe",
"last_ds_final_block": "3wFXoS21Jd8SxT4sCoTJF7vSzRn8e2pDdsN4zkuWifK7",
"next_bp_hash": "5FDs7Jj8fKnWk4tMpeAgAX7CPtjJiMbEfGTBy6KiKKa2",
"block_merkle_root": "F9SnNDxrFy4cYTg7b6Cg1Af5pyEvqmT8NG1fWEdtbeHf",
"epoch_sync_data_hash": null,
"approvals": [
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"ed25519:5s9zDPL8FaDAbtWqsMkbJKgvGTfb6mU3SciS1iuMVKERKYJTY9gGyf1Ea7SqpE1zMv59Z2NsGmKVzykxASXfiB6o",
"ed25519:5hCNUAZe9kRKduQ3iFoMJxVWbJa3r7DeVJVzt3noT4pQfnATRXrDzvEnYVqYDbnvo1y3TaETwn5hX3dfYN4uP1SD"
],
"signature": "ed25519:525ZAEeDwKp7a4zCMnnRZv95XHPZvNhq6eiv7n6CabA2F2BZqcL4Ehog3BpHN2nvLo6NKb2Zi65UD4mAVQ1dqTJ2",
"latest_protocol_version": 51
},
"chunks": [
{
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"prev_block_hash": "3wFXoS21Jd8SxT4sCoTJF7vSzRn8e2pDdsN4zkuWifK7",
"outcome_root": "11111111111111111111111111111111",
"prev_state_root": "5cu7uJQHfsDxusrRmnSJk6asgqJk7VDnuD8c7xg2tgDT",
"encoded_merkle_root": "9zYue7drR1rhfzEEoc4WUXzaYRnRNihvRoGt1BgK7Lkk",
"encoded_length": 8,
"height_created": 61106578,
"height_included": 61106578,
"shard_id": 0,
"gas_used": 0,
"gas_limit": 1000000000000000,
"rent_paid": "0",
"validator_reward": "0",
"balance_burnt": "0",
"outgoing_receipts_root": "8s41rye686T2ronWmFE38ji19vgeb6uPxjYMPt8y8pSV",
"tx_root": "11111111111111111111111111111111",
"validator_proposals": [],
"signature": "ed25519:4rLf7dXYBdW1VcypytvdyxNGx61fRnsWdjnQyAvvsaezF6Jp2Zv4pePsaJGCABTefB6YHyoEt1WHiSkNjXB6rX5k"
},
{
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"outcome_root": "9ebNL1tRbKvUPZfEXd1E8yjhBeMLh7AxcQAsLzVRc6Rj",
"prev_state_root": "EZFLBcxWeZhDHDEGoHCcrMjuHXj6GrkgzDAc6GV344En",
"encoded_merkle_root": "GQkMpbjCW2KuprPFzynHDEfz49WT6XzuCfc4V8m5VqGr",
"encoded_length": 721,
"height_created": 61106578,
"height_included": 61106578,
"shard_id": 1,
"gas_used": 29673444872813,
"gas_limit": 1000000000000000,
"rent_paid": "0",
"validator_reward": "0",
"balance_burnt": "2368543914874800000000",
"outgoing_receipts_root": "EkxKDxFGg2HDiL1cYsSnZVwHFAVqUoi7Cx8UQ4oJWngs",
"tx_root": "11111111111111111111111111111111",
"validator_proposals": [],
"signature": "ed25519:4a6oqJ4TeAjPdHpEmm2SrNtH1eaxrhn3MvpNDJ8AVUS1qiHVx8EHwMwWnBmT7c2heP5k6rZQW1V23uh4xDMFEStE"
},
{
"chunk_hash": "AeCMVaTv2XVA5Hsz1A7NHMifGZjfnQXFd4jr6fYNBzDk",
"prev_block_hash": "3wFXoS21Jd8SxT4sCoTJF7vSzRn8e2pDdsN4zkuWifK7",
"outcome_root": "Fv7men1ABnTqNT8V1V1nziRBAiinqP6179GWFJgTHtvM",
"prev_state_root": "5LDJLEYzgQL8Yhq57UeiLELiYEa7mgLtYT1vXXLjWq9p",
"encoded_merkle_root": "gVXCVRcevsgNYpju4JTBwiQAWo6xhTr2FXDrJpsg8w2",
"encoded_length": 243,
"height_created": 61106578,
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"gas_used": 2651253370078,
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"rent_paid": "0",
"validator_reward": "0",
"balance_burnt": "242807080757800000000",
"outgoing_receipts_root": "8g1X6Dy7gGP45GsJGHJzo3UydWoQVomHgeBoY2jXH53b",
"tx_root": "11111111111111111111111111111111",
"validator_proposals": [],
"signature": "ed25519:31jTd46sd5FxqUo2u3VfBnpfRn6H58K6LmZ4cMHHE7izFwnD8H6yezwX7tTvTL5SeLswHwumLNWaLoburfKhuy6k"
},
{
"chunk_hash": "5HDCuqzqzs7kAb5YGqpviWPaNABbgLuvQvdD3QwzjJiq",
"prev_block_hash": "3wFXoS21Jd8SxT4sCoTJF7vSzRn8e2pDdsN4zkuWifK7",
"outcome_root": "A6Zzh1iwyv7nE6rLHToLfQqAonMPbbYpX2ZgcV2KNm5F",
"prev_state_root": "CPSTqm7tLZcezLsusjcg4GYLfZGSWWDqyV9GYVnx19x5",
"encoded_merkle_root": "B4jGi1jv3pXsmwRZRxrjsVbd5eTvh5iKeV2UJFXEqyZu",
"encoded_length": 3704,
"height_created": 61106578,
"height_included": 61106578,
"shard_id": 3,
"gas_used": 22280294197255,
"gas_limit": 1000000000000000,
"rent_paid": "0",
"validator_reward": "0",
"balance_burnt": "2126811813818600000000",
"outgoing_receipts_root": "CfDZxPJhqFUbbXmwDgBu18C8V1JGyqN2waXaEkhk47tQ",
"tx_root": "8E4o35TnGZTHDKEMK9D7s7QxisvYrbo88MrbaimDnrds",
"validator_proposals": [],
"signature": "ed25519:66oiuXYikkUgRLt1s6HxgFyZ2Vx6MLaHEe4joUWpLfSjYAJEQqcqbkoJBWMPTcffQCiKejsC5tW2PF9jKa2uKufj"
}
]
},
"id": "dontcare"
}
Возвращаемые данные представляют собой последнюю созданную точку SyncCheckpoint .
Но что такое SyncCheckpoint ?