Statescan is an explorer solution for substrate based chains. We have been serving polkadot/kusama and related chains since 2021. Compared to explorers like subscan, it provides a 100% open source solution and low cost candidate for ecosystem projects.

Besides polkadot/kusama relay and system para chains, followings chains has adopted statescan as their explores: Hyperbridge(Nexus, gargantua), Heima(Litentry), Laos, Crust Shadow, Argon, Ajuna, Frequency, Datahaven testnet, Cere, Interlay. There are also projects who deployed statescan by theirselves like Joystream and 3Dpass.

Infrastructure

For relay chains and system para chains.

Items	Details	per month	Months	Total
Servers	13 servers + 2.3TB volume	$304	9	€2736
Domain	1 io domain	-	9	$45
Total		-	18	$2781

Maintenance

The maintenance work mainly includes:

• Server deployment maintenance: daily server monitor, upgrading products versions, emergency handling, etc.
• Codebase maintenance: code refactor, bug fixes, UI tweaks, dependency upgrading, etc.

Please check the commits for more details. We will request 5 FTE days equivalent work per month.

Common features development

Item	Workload	Cost
Staking features including reward data indexing, show staking rewards and nominations on account detail page and an all validators page. Related PR: #1084, #1133, #1136, #1137, #1152, #1155, #1156	2 FTE * 2 week, 160 hrs	$12,800
Total	160 hrs	$12,800

Total cost

Item	Workload	Cost
Infrastructures	servers and domains	$2781
Maintenance	Code refactor, UI tweaks and polish, bug fixes, etc;	28,800
Common features development	Please check the development section	$12,800
Total	-	44,381