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

Cannabis COA registry

Certificates of analysis on a private ledger, lot by lot.

A certificate of analysis is a record the lab writes and the producer, retailers and buyers all rely on. Recorded on a ledger the producer and the lab both run, it cannot be edited or attached to the wrong lot later. A signed PDF often does the job; the ledger helps when several producers and labs share a registry.

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// what matters here

What is different in this industry.

Written by the lab

The lab uploads the certificate against the producer's lot, so the producer never handles the file in between.

Fingerprinted on the ledger

Each certificate's fingerprint is recorded with the lot, so a changed PDF shows at once.

A QR code on the case

Buyers scan the case and see the certificate for that lot, as the lab reported it, with no claims added.

When a signed PDF is enough

If one producer and one lab are involved, a signed PDF with a lookup page is simpler and cheaper.

// 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

Certificate of analysis registry

Hypothetical. Not a client, not a result.

// The problem

Retailers and provincial buyers ask a producer for the certificate of analysis behind each lot, and PDFs passed along by email can be edited or attached to the wrong lot.

// What we would build

A registry where the testing lab uploads each certificate of analysis against the producer's lot, recorded on a private permissioned ledger the producer and the lab each run a node of, with a QR code on each case that shows buyers the certificate for that lot. A signed PDF with a lookup page often does this job; the ledger helps when several producers and labs share one registry.

// What is in it

Certificates uploaded by the lab against the producer's lot number
Each certificate fingerprinted on a private chain with a node for producer and lab
QR codes on cases that show buyers the certificate for that lot
Alerts when a lot is labelled before its certificate is in
Test results shown as reported by the lab, with no claims added

// Stack

Next.js
Hyperledger Besu (private, permissioned)
PostgreSQL
S3-compatible storage
AWS Canada

// estimate

Build: ≈ US$124,000 to US$189,000, delivered within 26 weeksCAD 176,000 to 269,200
Hosting: ≈ US$176 a monthCAD 250 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 3.4 weeks
Label templates approved by your quality assurance person: 1.9 to 2.9 weeks
Core features: 1.9 to 2.9 weeks
Full build: 0.9 to 1.9 weeks
Devnet: 2.9 to 5.4 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 35,200 to 53,840
Discovery 2.2%: CAD 3,872.00 to 5,922.40
Architecture 5.9%: CAD 10,384.00 to 15,882.80
Design approved 2.2%: CAD 3,872.00 to 5,922.40
Label templates approved by your quality assurance person 8.7%: CAD 15,312.00 to 23,420.40
Core features 6.6%: CAD 11,616.00 to 17,767.20
Full build 4.4%: CAD 7,744.00 to 11,844.80
Devnet 17.7%: CAD 31,152.00 to 47,648.40
Testing and fixes 2.2%: CAD 3,872.00 to 5,922.40
Testnet 11.8%: CAD 20,768.00 to 31,765.60
Launch 2.2%: CAD 3,872.00 to 5,922.40
Mainnet 6.1%: CAD 10,736.00 to 16,421.20
Holdback, 30 days after launch (10%): CAD 17,600 to 26,920

Start from this example

// questions

Questions we get about this.

Does the registry replace our lab's reporting?

No. The lab reports as it does today; the registry records what it reported against the lot.

Can consumers see the certificates?

Whatever your advisers approve. Usually buyers and retailers see them; consumer-facing information follows the promotion rules.

Is any cannabis sold through the ledger?

No. It records certificates only. There is no token and nothing is sold on it.

Back to the industry: Cannabis 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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