Smart contract architecture

OwnaFarm’s smart contracts form the trustless backbone that handles all financial transactions.

Contract ecosystem

Contract summary

GoldToken (ERC-20)

Platform currency for all transactions.

Property	Value
Name	OwnaFarm Gold
Symbol	GOLD
Decimals	18
Initial supply	100,000,000

GoldFaucet

Testnet token distribution.

Property	Value
Claim amount	10,000 GOLD
Cooldown	24 hours

OwnaFarmNFT (ERC-1155)

Core contract for invoices and investments.

Feature	Description
Invoice submission	Farmers submit for approval
Investment tracking	Per-investor records
Harvest settlement	Automated claims

OwnaFarmVault

Yield reserve management.

Feature	Description
Yield deposit	Admin deposits reserves
Withdrawal	Only by OwnaFarmNFT
Emergency	Owner recovery function

Invoice status flow

Status	Code	Can invest	Can harvest
Pending	0	No	No
Approved	1	Yes	No
Rejected	2	No	No
Funded	3	No	Yes (after maturity)
Completed	4	No	No

Access control

Roles

Owner (deployer)
  - GoldToken: mint()
  - GoldFaucet: setClaimAmount(), setCooldown()
  - OwnaFarmVault: emergencyWithdraw()

Admin role
  - OwnaFarmNFT: approveInvoice(), rejectInvoice()
  - OwnaFarmVault: depositYield()

Public
  - GoldFaucet: claim()
  - OwnaFarmNFT: submitInvoice(), invest(), harvest()

Yield calculation

Example

Principal = Investment amount
Yield = Principal x (yieldBps / 10000)
Total Return = Principal + Yield

Principal = 1000 GOLD
yieldBps = 1500 (15%)
Yield = 1000 x (1500 / 10000) = 150 GOLD
Total = 1150 GOLD

Development

Item	Detail
Framework	Foundry
Language	Solidity ^0.8.24
Network	Mantle Sepolia
Chain ID	5003

​Contract ecosystem

​Contract summary

​GoldToken (ERC-20)

​GoldFaucet

​OwnaFarmNFT (ERC-1155)

​OwnaFarmVault

​Invoice status flow

​Access control

​Yield calculation

​Development