Client work

Live field passportMobile product in development

Hartolit

VANTREXIS is helping Hartolit connect precision agricultural work with a verifiable digital history for every field. The NFT-based digital field passport is already live and used to certify real field operations, linking completed treatments with structured evidence and blockchain-backed verification. We are now extending that foundation into a mobile product for day-to-day field management, operations, and certification.

  • AgriTech
  • Web3
  • Mobile
Discuss an AgriTech product
Hartolit precision agricultural field operation with treatment route and verified digital field record.
Industry
AgriTech
Engagement
Product engineering
Live solution
Digital field passport
Next product
Mobile app · In development

The challenge

Agricultural evidence is often fragmented.

Treatment records can be distributed across documents, operators, equipment, and systems. That fragmentation makes it harder to establish a reliable history of what happened on a field, when it happened, and who completed the work.

Traceability

Connect a field to the operations and evidence recorded against it.

Transparency

Make the operational history understandable to the people who rely on it.

Trusted proof

Preserve a verifiable record of completed agricultural work.

Live solution · In use

Digital field passports already used in real operations.

Hartolit is already using the NFT-based digital field passport to create verifiable records for completed agricultural operations. Field activity can be associated with structured evidence and a blockchain-backed record, creating a persistent history that supports certification and future operations.

  1. 01

    Field

    A persistent identity for the agricultural area.

  2. 02

    Operation

    A treatment or precision field activity takes place.

  3. 03

    Operational data

    Relevant parameters and evidence are associated with the work.

  4. 04

    Verification

    The record is prepared as trusted proof of completion.

  5. 05

    Blockchain record

    A durable, architecture-neutral verification layer.

  6. 06

    Field passport

    A coherent history that can be reviewed over time.

Selected capabilities

A useful record, not blockchain for its own sake.

The live field passport connects the identity and area of a field with operation details, treatment dates, providers, equipment, parameters, evidence, and the resulting certification record.

01

Persistent field identity

02

Operation and treatment history

03

Service provider and equipment context

04

Photos and proof of work

05

Digital verification record

06

Reviewable certification history

Mobile product · In development

Field history and verification in one place.

The mobile product builds on the field-passport infrastructure already in use, bringing field history, operations, and verification into a practical day-to-day interface. The screens below are product concepts, not a released application.

  1. Field management
  2. Operation
  3. Verification
  4. Digital history
Hartolit mobile concept showing managed fields, agricultural operations and verification statuses.
01

Fields

In development

A map-led overview of managed fields, active operations and verification status.

Hartolit mobile concept showing field information, operation history and digital field passport.
02

Field details

In development

Field identity, operational history and verification in one working context.

Hartolit mobile concept showing a precision treatment operation, RTK positioning, timeline and verification.
03

Operation details

In development

A traceable precision-treatment workflow connecting planning, RTK execution and proof.

Hartolit mobile concept showing a verified digital field passport and traceable operation history.
04

Digital field passport

In development

A persistent operational record connecting field history, verification and linked proof.

Technology & architecture

Engineering the path from field activity to a verifiable record.

Hartolit combines an operational field-passport layer already in use with a broader mobile and telemetry architecture now being developed around it. The stack is intentionally split between the implemented verification system and the next product layer for field operations, geospatial data and drone telemetry.

Live solution · In use

Digital Field Passport

A blockchain-backed verification layer that connects structured field-operation data with persistent integrity proofs and public record verification.

Web application

Typed workflows for capturing field, treatment and evidence data.

  • Next.js
  • React
  • TypeScript
  • Tailwind CSS
  • React Hook Form
  • Zod

Blockchain & verification

Non-transferable field-passport certificates with role-controlled issuance and on-chain integrity anchors.

  • BNB Smart ChainProduction rollout
  • Solidity
  • OpenZeppelin
  • Non-transferable ERC-721
  • Viem

Smart-contract engineering

Contract controls built around deterministic issuance, role boundaries and duplicate-record protection.

  • Foundry
  • OpenZeppelin AccessControl
  • Contract unit testing
  • Fuzz testing
  • Duplicate-payload protection
  • Emergency pause controls

Data integrity & evidence

Operation payloads can be fingerprinted deterministically, linked to distributed metadata and re-verified against the recorded hash.

  • SHA-256
  • Deterministic JSON serialization
  • IPFS
  • Pinata
  • QR verification

Web3 connectivity

Wallet connectivity and contract interaction for issuance and verification workflows.

  • Wagmi
  • RainbowKit
  • WalletConnect / Reown
  • Viem

Product architecture · In development

Mobile & Drone Operations Platform

The next product layer brings fields, treatments, drone operations, geospatial context and verification into one operational mobile workflow.

Mobile application

Cross-platform field operations with native device access and a shared application codebase.

Vue 3 · TypeScript · Ionic · Capacitor · Pinia

Backend & real-time

Target operational APIs and live state synchronization across field and mobile workflows.

NestJS · REST APIs · WebSockets · PostgreSQL

Maps & geospatial

Field polygons, treatment routes, spatial operations and coverage analysis.

PostGIS · MapLibre · GeoJSON · Turf.js

Drone & telemetry

Adapter-based ingestion for telemetry, operation files and vendor integrations.

Drone Integration Layer · MQTT · AWS IoT Core · MAVLink-compatible ingestion

Field data & evidence

Operational state, spatial records and durable evidence storage separated according to data type.

PostgreSQL · PostGIS · Amazon S3

Next product architecture · In development

From drone data to a verifiable field record.

  1. 01

    Field operation

    • Drone telemetry
    • Treatment route
    • Operator inputs
  2. 02

    Ingestion

    • Vendor adapters
    • MQTT
    • Operation files
  3. 03

    Field data

    • PostgreSQL
    • PostGIS
    • Evidence storage
  4. 04

    Mobile operations

    • Live field state
    • Maps
    • Treatment history
  5. 05

    Verification

    • SHA-256
    • IPFS
    • BNB Smart Chain
    • Digital Field Passport

Drone and field activity → normalized operational record → mobile workflow → verification → Digital Field Passport

Engineering considerations

Designed around trust, clarity, and change.

The product direction has to connect real-world field activity with a digital record without obscuring the people, evidence, or operational context behind it.

Architecture-neutral communication

Explain the value of verification without making unsupported claims about the underlying chain, token standard, or wallet design.

Field-first usability

Keep technical infrastructure behind workflows that make sense to agricultural operators and customers.

Evolving product surface

Support an active field-certification solution while shaping a mobile experience that is still in development.

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