Missing CellDeps in the transactions displayed by Explorer

[Flouse]

https://explorer.nervos.org/transaction/0x6fca12453f33534f005d0fd0d727129076bdbebfe8ddfd0d30b9d020d373fb4e

curl https: //mainnet.ckb.dev/rpc -X POST -H "Content-Type: application/json" -d '{"id": 2, "jsonrpc": "2.0", "method": "get_transaction", "params": ["0x6fca12453f33534f005d0fd0d727129076bdbebfe8ddfd0d30b9d020d373fb4e"]}'

Result

{
    "jsonrpc": "2.0",
    "result": {
        "cycles": "0x48413a",
        "transaction": {
            "cell_deps": [
                {
                    "dep_type": "code",
                    "out_point": {
                        "index": "0x0",
                        "tx_hash": "0xd891e0e8c4864c730cc4b96b450ed1bcaf42e74c9eb1a38fb193caaf490f9a3d"
                    }
                },
                {
                    "dep_type": "code",
                    "out_point": {
                        "index": "0x0",
                        "tx_hash": "0x9f8e73e096f1583696760281004d71dc0cebd3c9aa6fb584949facde6e543e67"
                    }
                },
                {
                    "dep_type": "code",
                    "out_point": {
                        "index": "0x0",
                        "tx_hash": "0x625696834db4320214a8af09de74fd51fc8a83be69d920243f8ccd219071473b"
                    }
                },
                {
                    "dep_type": "code",
                    "out_point": {
                        "index": "0x0",
                        "tx_hash": "0x2e46a10a67987594d4eaee2d5f9ac96ce651f7bfb44e82c286a12a1950ad4f29"
                    }
                },
                {
                    "dep_type": "dep_group",
                    "out_point": {
                        "index": "0x0",
                        "tx_hash": "0x71a7ba8fc96349fea0ed3a5c47992e3b4084b031a42264a018e0072e8172e46c"
                    }
                }
            ],
            "hash": "0x6fca12453f33534f005d0fd0d727129076bdbebfe8ddfd0d30b9d020d373fb4e",
            "header_deps": [],
            "inputs": [
                {
                    "previous_output": {
                        "index": "0x0",
                        "tx_hash": "0x278ecd52eb9772feec0f048df4a27346f356e24ecad19ebb56b39decc1a2390c"
                    },
                    "since": "0x40000000645df6ce"
                },
                {
                    "previous_output": {
                        "index": "0x1",
                        "tx_hash": "0x278ecd52eb9772feec0f048df4a27346f356e24ecad19ebb56b39decc1a2390c"
                    },
                    "since": "0x0"
                },
                {
                    "previous_output": {
                        "index": "0x2",
                        "tx_hash": "0x278ecd52eb9772feec0f048df4a27346f356e24ecad19ebb56b39decc1a2390c"
                    },
                    "since": "0x0"
                }
            ],
            "outputs": [
                {
                    "capacity": "0x7676d7e00",
                    "lock": {
                        "args": "0x0075c62406c6b180d8ffe96400d7f08e6e89d186dc00",
                        "code_hash": "0xa4398768d87bd17aea1361edc3accd6a0117774dc4ebc813bfa173e8ac0d086d",
                        "hash_type": "type"
                    },
                    "type": {
                        "args": "0xab21bfe2bf85927bb42faaf3006a355222e24d5ea1d4dec0e62f53a8e0c04690",
                        "code_hash": "0xfef1d086d9f74d143c60bf03bd04bab29200dbf484c801c72774f2056d4c6718",
                        "hash_type": "type"
                    }
                },
                {
                    "capacity": "0xdf8475800",
                    "lock": {
                        "args": "0x1ca35cb5fda4bd542e71d94a6d5f4c0d255d6d6fba73c41cf45d2693e59b307280d6acef972db4688408a5e196f92eb0457ca003d9aa1c45ff05056b429b353935b3080000000000",
                        "code_hash": "0xb619184ab9142c51b0ee75f4e24bcec3d077eefe513115bad68836d06738fd2c",
                        "hash_type": "type"
                    },
                    "type": null
                },
                {
                    "capacity": "0x65389a57b1",
                    "lock": {
                        "args": "0x75c62406c6b180d8ffe96400d7f08e6e89d186dc",
                        "code_hash": "0x9bd7e06f3ecf4be0f2fcd2188b23f1b9fcc88e5d4b65a8637b17723bbda3cce8",
                        "hash_type": "type"
                    },
                    "type": null
                }
            ],
            "outputs_data": [
                "0xd6eea74bbbde42287e71e5831f6869d06c3f9711af2f5001546e71f808e69a0d620da6616be23aef1f6e5418cfdcdceb8ee1c07b17593b7baf7c5a65bb314cd0802f00007cd4fcaa4b9828164cdf37fa9d2eb5109def7effc20ec392b8fa2a40fbb244de36b30800000000000000000000000000000000000000000000000000000000000000000000000000c166b3020367ca811aa5977a601a616fefd5a2ce6907d9b943d2a6cd3dd683be48120c0f8801000095710800000000000001",
                "0x",
                "0x"
            ],
            "version": "0x0",
            "witnesses": [
                "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",
                "0x10000000100000001000000010000000",
                "0x5500000010000000550000005500000041000000a30a8b5997dd91c69c4c9383b41d577c86211dfd3ba40c806a0863c5c603bb5331b200427f09f95216cfa03d0c5def3906f23ff063090fb7549763a4f0e1105a01"
            ]
        },
        "tx_status": {
            "block_hash": "0xc1315f5304d5d4247217885df4a425a6beb90252a64758c81117cfa65849f6ed",
            "reason": null,
            "status": "committed"
        }
    },
    "id": 2
}

[Keith-CY]

Seems that cell deps in all transactions are lost, possibly a bug of the new sync mechanism that is not found in staging environment

[Keith-CY]

This issue has been fixed by nervosnetwork/ckb-explorer#1277 but the reason is not mentioned in PR message.
Please add a brief explanation in this issue so we can track the code in the future @ShiningRay

[ShiningRay]

The returning object of to_h method of Transaction object from CKB SDK is hash with symbol keys, and the old cell_deps field has string keys, so the processing method did not find correct cell deps info before. And now is fixed

[Keith-CY]

Cell Deps are lost in many transactions.

For instance, block 9840000 has 3 transactions.

Transaction 0xc601470aff46ce3b498ecc314641f686abfaf5ab8b79e39b3a01022251069389
shows:

• 0 cell deps
• 1 header deps

It's expected to have 23 cell deps and 1 header deps

Transaction 0x52398c370ab42eadb5e648e589b9bedf7a4e3d4f4e026524ddcb9960f7366c80
shows:

• 0 cell deps
• 0 header deps

It's expected to have 3 cell deps

So the header deps are synced correctly but cell deps are lost

[rabbitz]

Transactions after 0xc601470aff46ce3b498ecc314641f686abfaf5ab8b79e39b3a01022251069389 missing data for cell_dependencies fixed.

https://github.com/nervosnetwork/ckb-explorer/blob/master/app/models/deployed_cell.rb#L26

DeployedCell.create_initial_data(ckb_transaction_id)

[Keith-CY]

How is it going

[rabbitz]

The transactions missing cell deps before 0xc601470aff46ce3b498ecc314641f686abfaf5ab8b79e39b3a01022251069389 (24 items) have been fixed.