labs@atheron:~/industries/childcare/blockchains$ launch chain --validators

Funder attendance

One attendance record for centres and the funder.

Most centres are better served by a database and a good report, and we will say so. A shared ledger earns its cost only when several operators and a funder want an attendance record none of them controls, so claims and audits are checked against the same totals.

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// what matters here

What is different in this industry.

Recorded from sign-in

Daily totals come straight from the sign-in records, not a monthly spreadsheet.

No one can rewrite it

The centres and the funder each run a node, so past attendance cannot be changed by one party.

Totals, never children

Only attendance totals are shared. Children's details stay with the centre.

Reports the funder asks for

Claims and reports are produced in the format your funder uses.

// example projects

Priced examples for this service.

Each one is hypothetical, labelled as such, and priced live from our rate card. Open any of them in the estimator and make it yours.

Example projectWeb appBlockchain

Attendance records shared with a funder

Hypothetical. Not a client, not a result.

// The problem

Centres receiving public childcare funding send monthly attendance reports to the funder, and every audit means matching sign-in sheets, spreadsheets and claims line by line.

// What we would build

Each day's attendance totals recorded on a private permissioned ledger the centres and the funder run nodes of, so subsidy claims are checked against one record nobody can rewrite. Most centres are better served by a database and a good report, and we will say so; the ledger earns its cost only when several operators and a funder want a record none of them controls.

// What is in it

Daily attendance totals recorded from sign-in
Claims checked against the same record
No party can change past attendance alone
Only totals are shared, never children's details
Reports in the format your funder asks for

// Stack

Next.js
PostgreSQL
Hyperledger Besu (private, permissioned)
AWS

// estimate

Build: ≈ US$113,000 to US$172,000, delivered within 23 weeksCAD 160,200 to 245,000
Hosting: ≈ US$492 a monthCAD 700 a month
Support: ≈ US$2,500 a monthCAD 3,565 a month

Prices in your currency are estimates from today's Bank of Canada rate. All invoicing is in CAD or USD.

Timeline by milestone

Discovery: 2.9 to 3.4 weeks
Architecture: 0.4 weeks
Design approved: 2.4 to 4.4 weeks
Core features: 1.4 to 2.4 weeks
Full build: 0.9 to 1.9 weeks
Devnet: 2.9 to 4.9 weeks
Testing and fixes: 0.4 weeks
Testnet: 2.9 to 3.4 weeks
Launch: 0.9 to 1.4 weeks
Mainnet: 0.9 to 1.4 weeks

How it is paid

Deposit 20%: CAD 32,040 to 49,000
Discovery 2.5%: CAD 4,005 to 6,125
Architecture 6.7%: CAD 10,733.40 to 16,415.00
Design approved 2.5%: CAD 4,005 to 6,125
Core features 7.5%: CAD 12,015 to 18,375
Full build 5%: CAD 8,010 to 12,250
Devnet 20.2%: CAD 32,360.40 to 49,490.00
Testing and fixes 2.5%: CAD 4,005 to 6,125
Testnet 13.4%: CAD 21,466.80 to 32,830.00
Launch 2.5%: CAD 4,005 to 6,125
Mainnet 7.2%: CAD 11,534.40 to 17,640.00
Holdback, 30 days after launch (10%): CAD 16,020 to 24,500

Start from this example

// questions

Questions we get about this.

Why use a ledger for childcare attendance instead of a database?

Only when several operators and a funder want a record none of them controls. Otherwise a database is the better choice.

Are children's names stored on the attendance ledger?

No. Only daily totals by centre and age group are recorded.

Does the funder need to run its own node?

It can, or we host one for it. The point is that no single centre holds the record alone.

Back to the industry: Childcare and early learning About the service: Private and public blockchains

// next

Not quite your project?

Tell us what you have in mind. We will come back to you with a range and the questions that would narrow it. Or book a call and talk it through.

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