A loan backed by your harvest,
without selling it.

Lock your grain warrant as collateral and receive digital dollars (USDC) in seconds from an open liquidity pool. Public rules, every loan verifiable on‑chain.

Try a test loan →
70%Max loan-to-value
0.75%Origination fee
80%Liquidation threshold
~1sSettlement on Solana
Solana devnetNo real moneyStarter kit includedReady in about 2 minutes
View the program on Solana Explorer ↗
Built on open, verifiable infrastructure
The problem

Rich in grain, short on cash.

A producer can have tens of thousands of dollars stored in a silo bag and still lack the working capital to start the next season. The farming calendar doesn't wait for the sale.

Slow, bilateral credit

Credit against a warrant goes through a bank or a broker today: paperwork, manual approval and timelines that don't match the season.

Selling at the worst moment

The alternative is selling right after the harvest, when supply peaks and prices are at their lowest.

An asset that's already law

The warrant is regulated by Law 9,643, modernised by Decree 70/2023: electronic documents and divisible lots. Nothing new to invent.

Field in Argentina
Warrant certifiedSILO-TUC-005 · Law 9,643
Example
35,000 USDC sitting in a silo bag
100 t of soy at 350 USDC/t (simulated oracle price)
How it works

From silo bag to USDC in four steps.

The certifier registers the grain, the contract holds the collateral, the pool lends. No intermediaries in between.

01

Issue the warrant

The storage facility certifies the deposit and mints the digital warrant — one token per ton, straight to your wallet.

02

Lock it as collateral

Deposit the warrant in the on-chain vault. The program holds it — nobody can move it, not even us.

03

Receive USDC instantly

The open pool funds your loan in the same transaction: 70% of the grain's value.

04

Repay, get it back

Repay anytime and the warrant returns automatically. If the price collapses, anyone can liquidate and the collateral goes to the pool.

Under the hood
Physical layer

Digital grain warrant

Certified deposit of stored grain, a legal title under Law 9,643. In this demo: a test token from a simulated certifier.

SILO-TUC-005 · 100 t soy
Arva protocol

Solana vault

Anchor program locks the warrant as collateral under public rules.

LTV 70% · liquidation 80%
Capital layer

Open USDC pool

Permissionless liquidity disburses to the producer's wallet in seconds.

+24,316 USDC → producer
The video

The story of Arva, in under a minute.

From a silo bag to digital dollars: how a producer unlocks capital without selling the harvest.

Arva video cover
The numbers

100 tons of soy, ≈24,316 USDC in your wallet.

No fine print: these are the rules the contract enforces, the same for everyone.

70%Max loan-to-value
80%Liquidation threshold
0.75%Origination fee
8%Annual rate (demo)
  • Interest accrues per second, with no hidden charges
  • Anyone can liquidate an unhealthy loan: no committee, no discretion
  • The same parameters for every borrower
Read the rules in the contract

Price: 350 USDC per ton, read from the simulated oracle on devnet. Interest accrues per second at the demo rate. Amounts in test USDC.

Price buffer−12.6% before liquidation
warrant_mintedexample tx · devnet
Example loanSolana devnet
1Certified
2Locked
3Funded
Soybean warrantSILO-TUC-005 · 100 t
Collateral value35,000 USDC
Loan (70% LTV)24,500 USDC
Origination fee (0.75%)− 184 USDC
You receive
≈ 24,316 USDC
Settled in seconds, straight to your wallet
Loan healthSafe

Liquidates only if soy falls below 306 USDC/t

Try it yourself

Your stored grain is a credit line.

Pick the commodity, set the tonnage and choose how much to borrow — see exactly how much USDC the warrant unlocks and where liquidation triggers.

Commodity
Stored metric tons
50t2,500t5,000t
1,500 tons stored
Loan-to-value — your risk dial
30% safer70% max
Collateral buffer−12.6% to liquidation
Demo prices, reference only: the oracle is simulated. The MVP program lends a fixed 70%; choosing a lower LTV is on the roadmap.
Collateral value$525,000
Available credit (70% LTV)367,500 USDC
Annual rate8% fixed · demo
Liquidation price$306 / t
Connect wallet & lock warrant
Devnet demo — no real funds move.
Price risk

What if the price drops? The contract doesn't improvise.

Watch the soy price rise and crash on its own — the same math the contract runs. If the debt goes above 80% of the collateral value, anyone can liquidate it and the collateral moves to the pool treasury.

Soy price — USDC per ton
PriceLiquidation at 306Liquidation zone
liquidation 306 450400350250 LIQUIDATED
Soy price 350 USDC/t
Loan health 1.14
Status safe
Loan 24,500 USDC on 100 t
Below 306 → anyone can liquidate
Two sides, one pool

Producers get capital. Investors get real collateral.

For producers

Liquidity without selling the harvest.

Liquidity against the grain you already have. Repay and your warrant comes back.

  • 70% of the grain's value
  • Funds in seconds, in dollars
  • Get your warrant back when you repay
24,316 USDCfor 100 t of soy at 350 USDC/t (demo example)
Borrow against a warrant
For investors

Digital dollars, working in the real economy.

Put digital dollars to work in loans backed by real grain, under public rules.

  • Real, verifiable collateral
  • Interest and fees stay in the pool
  • Every loan is a public transaction
74%of Argentine investors hold crypto, yet it's the market that puts it to work the least. (Nexo, Digital Wealth Survey 2026)
Supply the pool
Business model

Warehouses distribute it. Producers use it. Lenders fund it.

The first customer is the licensed warehouse that already issues warrants. Arva gives its producers a credit product without using the warehouse's balance sheet.

The customer

Licensed warehouse

Offers credit against the warrants it already issues, and keeps its producers close.

PaysIntegration fee + a fee per financed warrant
The user

Producer

Borrows 70% of the warrant's value in seconds and gets the warrant back on repayment.

Pays0.75% origination fee + interest
The capital

Lenders

Fund the pool and earn the interest. Identified, qualified lenders first; the pool opens once the risk model is proven.

EarnsThe interest paid by producers
Warrant-backed note on MAVArva
SetupFour institutions: exchange agent, registry, market and certifierOne program, plus the warehouse that certifies
TicketAbout US$1M, across several notesPer warrant: US$20-50k is the target
TimeA bespoke, one-off structureSelf-service, funds in seconds
Rate7% a year, dollar-linkedSet by the pool (12% a year in this demo)
The first warrant-backed note on MAV, July 2026 (Bolsa de Comercio del Chaco, via Bichos de Campo). Arva doesn't compete on rate: it serves the tickets that structure can't reach.
1
PilotOne licensed warehouse and identified lenders.
2
ScalePlug into the digital warrant registries of A3 and Matba Rofex.
3
OpenOpen the pool as the model proves itself.
Why on-chain

Rules in code, not in a drawer.

A warrant on paper needs someone to trust. A warrant on Solana carries its own rules: who holds it, how much it backs and when it's liquidated.

Programmable collateral

Lock, release and liquidation by price threshold, with no middleman and no courtroom.

if price < 306 {
  liquidate(loan)
}

Public audit trail

Every operation is a transaction anyone can verify on the explorer.

loan_disbursed↗

warrant_locked↗

warrant_minted↗

No custodian

The program holds the collateral, with the same rules for everyone.

Program vault (PDA)no private key · nobody can move it

Seconds and cents

Solana settles in seconds for a tiny fee, so even small loans make sense. In USDC, not a volatile token.

~1sconfirmation

<$0.01network fee

"
Banks already lend against tokenised grain. Nobody has opened up the liquidity.

Since 2022, Santander, Galicia and Grupo Petersen's banks have lent against grain tokens alongside Agrotoken. Always bilateral: one bank, one producer, one approval. Arva adds the missing layer — an open pool anyone can fund, where anyone can liquidate an unhealthy loan under public rules.

Sources: Santander press release (March 2022), Infobae, BeInCrypto.

The market

A booming instrument. Credit that can't keep up.

Warrant issuance is at record highs in Argentina, yet bank credit covers only a fraction of the harvest. Meanwhile, millions of Argentines hold digital dollars that finance nothing.

US$2.08B

in warrants issued in 2025, up 93% year over year

Argentine Secretariat of Agriculture
~30%

of the value of grain output is covered by credit: about US$32 per ton

CONINAGRO, BCRA data
64%

of agribusinesses needed credit this month; 41% postponed a decision over cost or access

Tasómetro Satower
19.8%

of Argentines use crypto — the highest adoption in Latin America

Chainalysis 2025
Speed

From warrant to dollars in one transaction.

The point isn't a cheaper rate. It's money that arrives when the season needs it.

Credit against a warrant todayPaperwork…
PaperworkReviewApprovalFunds
With ArvaSigning…
SignUSDC in your wallet
Illustrative. Bank timelines vary; a Solana transaction confirms in about a second.
Today

Credit against a warrant today

  • Bilateral: one bank, one producer
  • Paperwork and manual approval
  • Business hours and bank timelines
  • Terms negotiated case by case
With Arva

Open liquidity, public rules

  • Open pool: anyone can supply capital
  • Lock the warrant and receive USDC in the same transaction
  • Solana settles in seconds, 24/7
  • Public rules, identical for everyone
Powered by Solana

Every loan is a Solana transaction.

Arva is an Anchor program on Solana devnet. Warrants are SPL tokens, the pool is a program vault, and every step settles on-chain in about a second for a fraction of a cent.

Anchor programSPL Token warrantsUSDC poolPhantom wallet
Connecting to devnet…
Current devnet slot·····
~0.4sper slot
~1sconfirmation
<$0.01network fee
Arva program AERC…iqiJ on Explorer ↗
Transparency

What's real and what's simulated.

We'd rather say it plainly. This is a devnet demo: the money is test money, the code is real.

2 real on devnet2 simulated2 not in this MVP
Verify the program on Solana Explorer ↗
Program and transactionsReal on devnet
Pool, loans, repayments and liquidationsReal on devnet
Certifier (warrant issuer)Simulated
Grain price oracleSimulated
Investor withdrawalsNot in this MVP
Security auditNot audited
Roadmap

What comes after the prototype.

You are here: a working prototype on Solana devnet
01

Licensed warehouse pilot

Real warrants certified by a licensed warehouse. The metric: the first financed warrant.

02

Real price feed

A market quote with a maximum age and its own authority, instead of the simulated oracle.

03

Lender side and audit

LP shares, withdrawals for lenders and a security audit.

04

Mainnet

Real USDC, only after a legal review and the steps above.

FAQ

What everyone asks.

Is this real money?+
No. Arva runs on Solana devnet, the test network. The USDC is test money with no value, but every action is a real transaction you can verify on the explorer.
Is the contract audited?+
Not yet. It's a hackathon prototype and we say so up front. An audit comes before any real money.
Who issues the warrants?+
In the demo, a simulated certifier run by the team. In production, a warehouse company registered under Law 9,643 would issue them.
Where does the grain price come from?+
From a simulated oracle the team updates to show liquidations. Production would use an independent price feed.
How do I try it?+
Install Phantom, switch it to devnet and open the app. Tap the starter kit and you get test SOL, test USDC and a demo warrant, so you can borrow and repay in a couple of minutes. The built-in guide walks you through every screen.
Can I be an investor too?+
Yes. From the Earn screen you supply test USDC to the open pool and watch it fund loans. Interest and fees stay in the pool. Investor withdrawals are not part of this MVP.
Who pays for Arva?+
The licensed warehouse pays an integration fee and a fee per financed warrant, because Arva gives its producers credit without using its balance sheet. The producer pays a 0.75% origination fee plus interest, and the interest goes to the lenders.
Why not a warrant-backed note on MAV?+
It works, but the first one needed four institutions and a bespoke structure for about US$1M. Arva uses the same collateral for tickets that structure can't reach: one warrant, self-service, funds in seconds.
Alejandro Colchi
Designed and built by
Alejandro Colchi Solo builder · grew up in General Güemes, Salta · Information Systems Engineering student in San Miguel de Tucumán Colosseum Crypto World's Fair · Superteam Argentina track
@alejandrocol-dev LinkedIn Source code ↗