Description
A team is encountering frequent block hash mismatches (roughly every other day) between the public instance of Sidecar on Kusama Asset Hub (https://kusama-asset-hub-public-sidecar.parity-chains.parity.io/) and their local running Sidecar instance. The hashes eventually align after some time.
Examples
Block 10437072 (example from 2025-08-11), hashes from Sidecar public instance:
- Returned hash:
0xf1264fe9c87b93e734f46a2b8e3643ecda28cd76e7f6fa4eb217f77095bd35f0
- Expected hash:
0x03f40004c552694239b46fb0c2fe4f8c9d10ca096893cd2ad0a2a6637efb3988
Block 10168812
https://kusama-asset-hub-public-sidecar.parity-chains.parity.io/blocks/10168812?noAuthor=true
- Returned hash:
0x4025c34a05bb24f9e0b63c4d50e910dcf637d3859b3bd48ce640f2addf132913
- Expected hash:
0x1a09e6cbc81837e02937ff365d2f38cbbeb69e661e07a6cfd20c82c1bff60754
Other Examples
- Block
10081077
- Returned Hash:
0xc58a4eda15cd317e02b80e8e48d332c76cff0af98a4fa63cd619dbbd7eb97ab4
- Block
10107012
- Returned Hash:
0x063c4e93cebaaf403c94203073ab08eacdbabbb7a5f7f8b3426ed1109d8b4e93
- Block
10114100
- Returned Hash:
0x7f1d3df7fba1ae50f54e0a1cd647cdba85020cd8b21027939c7988f34ad4bc2e
- Block
10117002
- Returned Hash:
0x868ce40e699dec518f0dc641bd50b7e7e19cfe22d1cd0cab4de271c2cc786265
- Block
10117489
- Returned Hash:
0xdae9acc16cc0ff028949cb1b3ebb389e946b2bcff3958b218b6aa437d6dbd78f
- Block
10121210
- Returned Hash:
0x359e931cddafefab91cf16861dae0a438b400a85a08f66196d675d45450189fa
- Block
10125839
- Returned Hash
0xa539a6f2ddc0a242a50db82b2d44ae21997f8f0c41f659ef53673f6c307cd72e
- Block
10148573
- Returned Hash:
0x10a6aeb1d45b26444b370af870fd57b8746ffa92657fa0f0287df97d69c196c3
- Block
10153820
- Returned Hash:
0x4e78f4e86242b83b06161ac3033a66cd8d92533e58fa8d681bb518387fdc02de
- Block
10185829
- Returned Hash:
0x6fa176143f4667990ef52e47a8433fe6ae0930132fcc97d308437f4dc390160f
Steps to Reproduce
The issue could be reproduced with the following method:
- Create a script that runs for a period of one day and queries blocks:
- from
https://assethub-kusama.subscan.io/block/{height} and
- from a local running instance of Sidecar.
- For each queried block, it compares the block hashes from the two sources and checks if they are the same.
Note
They never encounter mismatch when comparing with the public instance of Sidecar on Polkadot Asset Hub.
Description
A team is encountering frequent block hash mismatches (roughly every other day) between the public instance of Sidecar on Kusama Asset Hub (
https://kusama-asset-hub-public-sidecar.parity-chains.parity.io/) and their local running Sidecar instance. The hashes eventually align after some time.Examples
Block
10437072(example from 2025-08-11), hashes from Sidecar public instance:0xf1264fe9c87b93e734f46a2b8e3643ecda28cd76e7f6fa4eb217f77095bd35f00x03f40004c552694239b46fb0c2fe4f8c9d10ca096893cd2ad0a2a6637efb3988Block
10168812https://kusama-asset-hub-public-sidecar.parity-chains.parity.io/blocks/10168812?noAuthor=true
0x4025c34a05bb24f9e0b63c4d50e910dcf637d3859b3bd48ce640f2addf1329130x1a09e6cbc81837e02937ff365d2f38cbbeb69e661e07a6cfd20c82c1bff60754Other Examples
100810770xc58a4eda15cd317e02b80e8e48d332c76cff0af98a4fa63cd619dbbd7eb97ab4101070120x063c4e93cebaaf403c94203073ab08eacdbabbb7a5f7f8b3426ed1109d8b4e93101141000x7f1d3df7fba1ae50f54e0a1cd647cdba85020cd8b21027939c7988f34ad4bc2e101170020x868ce40e699dec518f0dc641bd50b7e7e19cfe22d1cd0cab4de271c2cc786265101174890xdae9acc16cc0ff028949cb1b3ebb389e946b2bcff3958b218b6aa437d6dbd78f101212100x359e931cddafefab91cf16861dae0a438b400a85a08f66196d675d45450189fa101258390xa539a6f2ddc0a242a50db82b2d44ae21997f8f0c41f659ef53673f6c307cd72e101485730x10a6aeb1d45b26444b370af870fd57b8746ffa92657fa0f0287df97d69c196c3101538200x4e78f4e86242b83b06161ac3033a66cd8d92533e58fa8d681bb518387fdc02de101858290x6fa176143f4667990ef52e47a8433fe6ae0930132fcc97d308437f4dc390160fSteps to Reproduce
The issue could be reproduced with the following method:
https://assethub-kusama.subscan.io/block/{height}andNote
They never encounter mismatch when comparing with the public instance of Sidecar on Polkadot Asset Hub.