Example projectWeb appBlockchain
Progress claim and holdback ledger
Hypothetical. Not a client, not a result.
// The problem
Owner, general contractor and trades each track progress claims, approvals and holdback in their own spreadsheets, and disagree about what was certified and when.
// What we would build
A private permissioned ledger where the owner, the general contractor and the major trades each run a node and record claims, certifications, change orders and holdback releases once, with a portal for each party. On a project where everyone trusts the general contractor's system, a shared database does the job and we will say so.
// What is in it
- Approved claims and holdbacks posted to QuickBooks Online, built on the QuickBooks Online API
- A node for the owner, the general contractor and each major trade
- Progress claims, certifications and change orders recorded once and signed
- Holdback held and released by the dates your contract and provincial rules set
- Each trade sees the status of its own money, and only its own
- Exports to each party's accounting system
// Stack
- Hyperledger Besu (private, permissioned)
- Next.js
- PostgreSQL
- Accounting system integration
- AWS
// estimate
- Build
- ≈ US$124,000 to US$190,000, delivered within 29 weeksCAD 176,500 to 270,000
- 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
- Data mapping and sandbox connection
- 0.4 weeks
- Design approved
- 3.4 to 5.4 weeks
- Core features
- 1.4 to 2.4 weeks
- Full build
- 0.9 to 1.9 weeks
- Devnet
- 2.9 to 4.9 weeks
- Sync built and reconciled in sandbox
- 0.9 to 1.9 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
- Live cutover
- 0.9 to 1.4 weeks
- Hypercare
- 0.9 to 1.4 weeks
How it is paid
- Deposit 20%
- CAD 35,300 to 54,000
- Discovery 2.1%
- CAD 3,706.50 to 5,670.00
- Architecture 5.7%
- CAD 10,060.50 to 15,390.00
- Data mapping and sandbox connection 1.6%
- CAD 2,824 to 4,320
- Design approved 2.1%
- CAD 3,706.50 to 5,670.00
- Core features 6.5%
- CAD 11,472.50 to 17,550.00
- Full build 4.3%
- CAD 7,589.50 to 11,610.00
- Devnet 17.3%
- CAD 30,534.50 to 46,710.00
- Sync built and reconciled in sandbox 4.9%
- CAD 8,648.50 to 13,230.00
- Testing and fixes 2.1%
- CAD 3,706.50 to 5,670.00
- Testnet 11.5%
- CAD 20,297.50 to 31,050.00
- Launch 2.1%
- CAD 3,706.50 to 5,670.00
- Mainnet 5.7%
- CAD 10,060.50 to 15,390.00
- Live cutover 1.6%
- CAD 2,824 to 4,320
- Hypercare 2.5%
- CAD 4,412.50 to 6,750.00
- Holdback, 30 days after launch (10%)
- CAD 17,650 to 27,000