Statescan is now an explorer implementation for Kusama/Polkadot asset parachains. We have implemented Statemine/Statemint/Westmint. We’re requesting the maintenance fee for the last 4 months(09.2021-12.2021).

Servers

We use 3 Hetzner vps + a 400G volume for production hosting and 2 contabo vps for development.

Hetzenr vps:

• vps1: CPX31(4 vcpu + 8G ram + 160G) = €12.4/mo = $14.20/mo
• Vps2: CPX41(8 vcpu + 16G ram + 240G) = €22.9/mo = $26.22/mo
• vps3: CPX41(8 vcpu + 16G ram + 240G) = €22.9/mo = $26.22/mo
• volume 400GB = €16.0/mo = $18.32/mo

Contabo vps:

• vps1: 4v + 8G ram + 200G = $6.99
• vps1: 4v + 8G ram + 200G = $6.99

Expsense:

+----------------+--------+---------+
| Item           | months | Cost    |
+----------------+--------+---------+
| Hetzner vps1   | 4      | $56.8   |
+----------------+--------+---------+
| Hetzenr vps2   | 1      | $26.22  |
+----------------+--------+---------+
| Hetzner vps3   | 1      | $26.22  |
+----------------+--------+---------+
| Hetzenr volume | 4      | $73.28  |
+----------------+--------+---------+
| Contabo vps1   | 2      | $13.98  |
+----------------+--------+---------+
| Contabo vps2   | 2      | $13.98  |
+----------------+--------+---------+
| Total                   | $210.48 |
+----------------+--------+---------+

Continuous development & daily maintenace

We keep actively developing to improve the product, and generally what we did includes:

• We integrated Statemint. It requres work like theme design, DOT price track, code refactor, block meta scan, etc.
• Performance improvement
  • Home page search performace improvement
  • Block/extrinsic/events first list page perforce improvement by introducting cache
• Feature enhacement like extrinsic/events filter improvment, 404/500 and other error pages customizatioin, extrinsic/events params shown improvement, etc.
• Bug fixes includes nft/asset approvals, destroyed assets holders, etc.
• Create google form to collect asset info.
• Monitor scripts are created to check the service failure and restart the services.

we request one developer 14 days work cost for last 4 months, and it's $500 * 14 = $7,000.

Metrics

Please check the 30 days and 24 Hours metrics from cloudflare.

Total cost & payment conditions

+------------------------------+-------------------+---------+
| Item                         | Duration          | Cost    |
+------------------------------+-------------------+---------+
| Servers                      | 09.2020 - 12.2020 | $210.48 |
| (see details in above table) |                   |         |
+------------------------------+-------------------+---------+
| Continuous development       | 09.2020 - 12.2020 | $7,000  |
| and daily maintenance        |                   |         |
+------------------------------+-------------------+---------+
| Total                                            | $7,210  |
+------------------------------+-------------------+---------+

Payment conditions:

1. The work is for both kusama(Statemine) and polkadot(Statemint), but to make the on-chain work simple, we apply from kusama and polkadot in turn every 4 monthes.
2. We will use the 30 day avg rate from Subscan to calculate the total KSM allocation at the day of submission.