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 and low cost candidate for ecosystem projects.

Besides polkadot system chains, followings chains has adopted statescan as their explores: Hyperbridge(Nexus, gargantua), Heima(Litentry), Invarch, Polimec, Laos,, Crust, Shadow, Tangle, Tanssi testnet, Argon. There are also projects who deployed statescan by theirselves like Subsocial and Edgeware.

Infrastructure

Items	Details	per month	Months	Total
Servers	8 servers + 1.3TB volume	€157.12	18	€2828
Domain	1 io domain	-	18	$89.78
Total		-	18	$3051

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 changelog and commits for more details. We will request 5 FTE days equivalent work per month.

Common features development

Item	Workload	Cost
Support EVM transactions indexing and fronted page, check issue #974	1 FTE * 1 week, 40 hrs	$3,200
More system chains support, check issue #987	1 FTE * 1 week, 40 hrs	$3,200
Total	80 hrs	$6,400

Total cost

Item	Workload	Cost
Infrastructures	servers and domains	$3051
Maintenance	Code refactor, UI tweaks and polish, bug fixes, etc;	57,600
Common features development	Please check the development section	$6,400
Total	-	67,051