Marketplace Escrow Contract

I will build an escrow smart contract for your marketplace on Starknet or EVM

Jedidiah GabrielProduct engineer · Kaduna, Nigeria · Replies within 24 hours

Marketplace Escrow Contract flyer: Trust should start with the first order.

About this gig

When strangers trade, someone has to go first. Escrow lets neither side take that risk alone.

I build escrow contracts that hold the buyer's payment, and optionally a return bond from the seller, until the deal's terms are met. The buyer accepts delivery and funds release. If nobody acts, timeouts settle the deal. If there's a disagreement, the dispute path collects evidence on IPFS and hands the decision to a resolver you choose.

What you get:

An escrow contract per order, or a factory for many deals
Release, refund and timeout rules written as code
Optional seller return bonds
A dispute flow with evidence links and a resolver role
Platform fee splits
Tests, testnet deployment and an optional dApp for buyers and sellers

I wrote Bilateral Escrow, an open-source Cairo contract on Starknet that holds a buyer's payment and a merchant's return bond until delivery terms are met. It's the foundation of escrowed trade in WeSelling.

Tell me what's being traded, who resolves disputes, and which token and chain you want.

Use cases

Freelance platforms

Milestone payments released on approval.

Cross-border trade

Goods paid for into escrow, released on delivery.

P2P exchanges

Crypto-for-fiat trades with time limits and disputes.

Real estate deposits

Holding fees released when documents are verified.

Marketplace orders

Buyer payment and seller bond held until delivery.

Services and events

Deposits returned or released based on outcomes.

Group buying

Funds pooled until a target is reached, else refunded.

Proof-gated release

Release when a zkTLS or ZK proof shows the condition was met.

What changes

Today

Buyers won't pay first, and sellers won't ship first
Disputes come down to who argues loudest
Payment platforms freeze funds or charge high fees to hold them
Cross-border deals have no neutral middleman

After

The buyer's payment is locked in the contract until delivery is accepted
An optional seller return bond, so both sides have something at stake
Timeouts that settle automatically when nobody acts
A dispute path with evidence on IPFS and a human resolver

How it works

01Buyer pays into escrow
02Seller posts a bond
03Seller ships
04Buyer accepts or disputes
05Funds released

Compare packages

Package	Starter$650	Business$1,500	Scale$3,600
What it is	Single-escrow contract with release, refund and timeout, tested on testnet	Escrow factory with seller bonds, disputes, evidence links and fee splits	Full escrow product: contracts, dApp, email-login wallets and a dispute console
Escrow per order	✓	✓	✓
Release, refund and timeout	✓	✓	✓
Testnet deployment	✓	✓	✓
Escrow factory for many deals	–	✓	✓
Seller return bond	–	✓	✓
Dispute flow with IPFS evidence	–	✓	✓
Platform fee split	–	✓	✓
dApp for buyers and sellers	–	–	✓
Email-login wallets	–	–	✓
Admin dispute console	–	–	✓
Delivery	8 days	16 days	28 days
Revisions	2	3	4

Add-ons

Faster delivery+30% of the package
Internal security review with written findings+$250
Written documentation for your team+$50
90 days of support and small changes+$240

Built before

Bilateral EscrowOpen-source Cairo contract that holds a buyer's payment and a merchant's return bond until delivery terms are met.github.com WeSellingMy own business operating system: storefront, inventory, HR, geofenced attendance, card and stablecoin payments.weselling.store

Who it's for

Marketplaces
Freelance and service platforms
Cross-border traders
P2P exchanges
B2B procurement

What I'll need from you

What's being traded and the delivery process
Who resolves disputes, and how
Token and chain
Fee model for your platform

Questions, answered

Does the contract know whether goods were delivered?

A contract can't see a parcel. Delivery is confirmed by the buyer, by a timeout or by a trusted signal such as a courier's API, and disputed cases go to a person. I design that flow with you so its limits are clear to your users.

Which tokens can it hold?

Any ERC-20 on EVM chains or any token on Starknet, usually USDC or USDT.

Who owns the code and accounts when we finish?

You do. Code goes to your repository, and services run on accounts in your name, so you are never locked to me. I hand over logins, keys and a short guide.

What if my project doesn't fit a package?

Send a message describing what you need. I reply with a custom offer priced to the actual scope, often after a short call.

The thinking behind it

Trust Should Start With the First OrderBuyers won't pay first and sellers won't ship first. Jedidiah Gabriel on escrow smart contracts with return bonds, timeouts and a dispute path, so two strangers can trade without a middleman holding the money.