I'm listening for new records added on block table and have noticed that sometimes two blocks are added almost at the same time with basically the same info except for block hash (maybe a slot battle/rollback, since eventually one of the blocks gets removed?).
The thing is when asking for the block's transactions UTXOS the block got removed return transactions with the same hash that the one who finally stays on chain but the transaction inputs/outputs are different (empty in this case).
So essentially the process is the following:
- New block gets added into dbsync
- Get block info (pool, transactions)
- Get block transactions utxos which are empty. Probably empty is just one case and the important here is the fact that the tx for the two blocks are different but has the same hash.
- Another block gets added into dbsync
- Repeat step 2
- Get block transactions utxos which aren't empty but have the same tx hash of the one returned by previous block
How is this posible, I think blocks is ok that enter into dbsync and the get removed due to rollbacks/slot battles but why the two blocks ended up with different txs (inputs/outputs) but the same hash?.
here is an example:
// arrive time [2022-10-28 13:40:52 UTC]
block info:
{
"id": "7956798",
"hash": "4eafa57522c951c571ef7f1f4f6c834b033ad2183121e4a02c9fd6f46ab91b8f",
"epoch_no": 372,
"slot_no": "75398161",
"epoch_slot_no": 57361,
"block_no": 7941775,
"previous_block": 7941774,
"next_block": null,
"slot_leader": "pool17kew7rtakc7g6qzydntann5umw08xq3ll2j7spk7en4kvff69fa",
"size": 58863,
"time": "2022-10-28T13:40:52.000Z",
"tx_count": "36",
"out_sum": "6189878553712",
"fees": "11268611",
"confirmations": 1,
"op_cert": "bf9af4d99bb361e89db95bde6303f756d864f85142691f92d897bafd986df8a9",
"vrf_key": "vrf_vk1ygptnml8rkgw9dmguft6dr8dnjaapk80lsynqdwzl9aap08qg6mslll3fc",
"pool": {
"pool_id": "pool17kew7rtakc7g6qzydntann5umw08xq3ll2j7spk7en4kvff69fa",
"raw_id": "f5b2ef0d7db63c8d00446cd7d9ce9cdb9e73023ffaa5e806decceb66",
"url": "https://bloompool.io/bloom-3.metadata.json",
"hash": "3cdd486927f8819dadb60ad8e9be691b8ba0ffa94b0356c38fe031b8f55b905f",
"name": "Bloom Three",
"ticker": "BLOOM",
"homepage": "https://bloompool.io/",
"description": "Bloom is committed to providing top quality staking services to our delegates through low latency, 24/7 uptime, and the highest return on stake. Operated by bigpey."
},
"transactions": [
{
"id": "53459220",
"hash": "d868dc0cde2733aa5ee87db7b5ac2ae0e82aadec4aff71ee70d8e95cbf330307",
"block_id": "7956798",
"block_index": 25,
"out_sum": "107197930",
"fee": "183849",
"deposit": "0",
"size": 642,
"invalid_before": null,
"invalid_hereafter": "75408970",
"valid_contract": true,
"script_size": 0,
"outputs": [],
"inputs": []
}
]
}
// arrive time [2022-10-28 13:40:53 UTC]
block info:
{
"id": "7956799",
"hash": "4d8296d03f2a0a471a16e34f2204026ac3c82311dfa2569fbb7f680e4cf3e66b",
"epoch_no": 372,
"slot_no": "75398161",
"epoch_slot_no": 57361,
"block_no": 7941775,
"previous_block": 7941774,
"next_block": null,
"slot_leader": "pool1ddg6t2h9kj6lqlec4ncjs945lzj43m3ggrgdhf5sgzhtygpkznz",
"size": 58863,
"time": "2022-10-28T13:40:52.000Z",
"tx_count": "36",
"out_sum": "6189878553712",
"fees": "11268611",
"confirmations": 1,
"op_cert": "d5b849f9757cd2ef60c883b092a7e985d27c22f89aac7648b13d3cfd4cce4737",
"vrf_key": "vrf_vk1m5tnjq3exhpu8mfcy6rl5xe5jedd8adzx6n5syju3vj8p5yhfels900hls",
"pool": {
"pool_id": "pool1ddg6t2h9kj6lqlec4ncjs945lzj43m3ggrgdhf5sgzhtygpkznz",
"raw_id": "6b51a5aae5b4b5f07f38acf12816b4f8a558ee2840d0dba69040aeb2",
"url": "https://fairpool.eu/fair01.json",
"hash": "8127f98bbad5af53a473e609d11e90f4135c2ae8cc86f27fafada12681a25d37",
"name": "Fair Pool #01",
"ticker": "FAIR",
"homepage": "https://fairpool.eu",
"description": "Highly available pool with a fair margin of 0.5%"
},
"transactions": [
{
"id": "53459256",
"hash": "d868dc0cde2733aa5ee87db7b5ac2ae0e82aadec4aff71ee70d8e95cbf330307",
"block_id": "7956799",
"block_index": 25,
"out_sum": "107197930",
"fee": "183849",
"deposit": "0",
"size": 642,
"invalid_before": null,
"invalid_hereafter": "75408970",
"valid_contract": true,
"script_size": 0,
"outputs": [
{
"address": "addr1qydesz3sg492xwwynmv9hq4jn5t9fw4gz9gm8z7vxzzssa5m4mchcz7v3u7xrhssl83yah25vxgcjahdlp5u03t3sd2sx48u9r",
"hash": "d868dc0cde2733aa5ee87db7b5ac2ae0e82aadec4aff71ee70d8e95cbf330307",
"index": 1,
"value": "72197930",
"smart_contract": false,
"assets": [
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5933",
"fingerprint": "asset1mnj2sgz8jufya0t9q3ccv8k5xxzsmwafzcvptc"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands6359",
"fingerprint": "asset154fae8j77qnn99ku6k507h5plltrfmey9ap4ff"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands4121",
"fingerprint": "asset13ul3yk367rgsn6jn9dcyflm6vel4rf0gns86kr"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands1482",
"fingerprint": "asset1cwllcee0vm2630skuxhnkqchz8rel2qpl0nxwy"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5324",
"fingerprint": "asset1wr6uxxamarkwmg5thf0f0dmwy06r7trse3xwp2"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5160",
"fingerprint": "asset13pk5cux9xue205w52vjl66xgu428tz63rhn4u3"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5682",
"fingerprint": "asset1wmw0pw6ft3f5myajkvxfwd5d884u9hhqj49dhz"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands1990",
"fingerprint": "asset1ha6at2s482re94tqazh5hlq28tv9nu6z4t3jwx"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5777",
"fingerprint": "asset122ue962qgvy3kc0qazlpn2ljdnlsdczl8l7a9t"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands4925",
"fingerprint": "asset18lhkp5al2xs5zu5pq7zjehymnne8md5ypy7nhp"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands7245",
"fingerprint": "asset1usc3r3rmthdpgs3894z6s8vc926vwjcxzd7te2"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands3366",
"fingerprint": "asset1mua39yqstznzxwscuql2krmrayh0f7achj0qzx"
}
]
},
{
"address": "addr1v97783v9dgj5vh6xlgwxazmgem2mpm0lz90vmgjs0kpz24sjc0usf",
"hash": "d868dc0cde2733aa5ee87db7b5ac2ae0e82aadec4aff71ee70d8e95cbf330307",
"index": 0,
"value": "35000000",
"smart_contract": false,
"assets": []
}
],
"inputs": [
{
"address": "addr1q8j27e5gt6jwy3nqx9x2g85c5zmwlfdvqnv3v9xer2dymh5m4mchcz7v3u7xrhssl83yah25vxgcjahdlp5u03t3sd2s86ucr3",
"hash": "9589e00ac142b8a42813efc01da95f52fe8d3cac5263ef7d4888e02a072b250b",
"index": 1,
"value": "107381779",
"smart_contract": false,
"assets": [
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5160",
"fingerprint": "asset13pk5cux9xue205w52vjl66xgu428tz63rhn4u3"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands4121",
"fingerprint": "asset13ul3yk367rgsn6jn9dcyflm6vel4rf0gns86kr"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands3366",
"fingerprint": "asset1mua39yqstznzxwscuql2krmrayh0f7achj0qzx"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5777",
"fingerprint": "asset122ue962qgvy3kc0qazlpn2ljdnlsdczl8l7a9t"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5324",
"fingerprint": "asset1wr6uxxamarkwmg5thf0f0dmwy06r7trse3xwp2"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands6359",
"fingerprint": "asset154fae8j77qnn99ku6k507h5plltrfmey9ap4ff"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands7245",
"fingerprint": "asset1usc3r3rmthdpgs3894z6s8vc926vwjcxzd7te2"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands4925",
"fingerprint": "asset18lhkp5al2xs5zu5pq7zjehymnne8md5ypy7nhp"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5682",
"fingerprint": "asset1wmw0pw6ft3f5myajkvxfwd5d884u9hhqj49dhz"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands1482",
"fingerprint": "asset1cwllcee0vm2630skuxhnkqchz8rel2qpl0nxwy"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands5933",
"fingerprint": "asset1mnj2sgz8jufya0t9q3ccv8k5xxzsmwafzcvptc"
},
{
"quantity": "1",
"policy_id": "b7761c472eef3b6e0505441efaf940892bb59c01be96070b0a0a89b3",
"asset_name": "CardanoWarriorsIslands1990",
"fingerprint": "asset1ha6at2s482re94tqazh5hlq28tv9nu6z4t3jwx"
}
]
}
]
}
]
}
