StarkEx V4
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Introduction
High-Level Overview
Deployments
StarkEx Deep Dive 🐬
Off-chain state
StarkEx, Cairo, and SHARP
Flow Description
Off-Chain Accounts
Deposit
Withdrawal
Off-Chain Minting
Transfer
Conditional Transfer
Trade
Perpetual Specific Flows
Forced Operations
On-Chain Accounts
StarkEx Contracts
StarkEx Specific Concepts
Becoming an Oracle Provider for StarkEx
Message Encodings
Data Availability Modes
Batch Flash Loans
DeFi Pooling
Integration
Crypto 🤓
STARK Curve
Pedersen Hash Function
Key Derivation
Wallets
Important Links
StarkEx V4.0 REST API
StarkEx Perpetual V2.0 REST API
StarkEx V4.0 Cairo code
StarkEx V4.0 Contract Change Log
StarkEx SDK
StarkEx Crypto SDK
Architecture
Solution Architecture
StarkEx Applications
StarkEx Smart Contracts Architecture
StarkEx Back End Architecture
StarkEx Partner Integration
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Deposit
The first step taken by the user who wishes to trade is to deposit her funds into StarkEx. This is done by first depositing the funds to the on-chain StarkEx contract. A corresponding off-chain deposit transaction then updates the off-chain state.

Step 1: Alice Deposits Funds On-Chain

Alice makes an on-chain transaction to deposit funds. The deposit operation supports deposits of ETH, ERC20, and ERC721.
The deposit function gets the following parameters:
  • starkKey - The starkKey corresponding to the vaultId.
  • assetType - The asset identifier of the token to be deposited. For more information, see here.​
  • vaultId - The recipient L2 account.
  • quantizedAmount - For ERC20 and ERC721, the amount to be deposited.
For more information, see the smart contract documentation.
Users can deposit to any vault, i.e. they can deposit to vaults that are not owned by them.

Step 2: Off-Chain Deposit Transaction

The off-chain app sends a deposit transaction to the StarkEx gateway.

Step 3: Deposit Included in a Batch

The StarkEx service verifies that there are indeed enough funds in the pending deposits area in the StarkEx smart contract to complete the off-chain deposit.
If the deposit is valid, it is included in a batch to be submitted on-chain along with the validity proof.
Note: Even before the deposit is proven and the proof is accepted on-chain, the funds already exist in the user's off-chain vault, and subsequent requests to use these funds may be executed.

Step 4: Remove Funds from the Pending Deposits Area

As part of the state update, the smart contract deduces the relevant amount of funds from the "pending deposits" area.
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Off-Chain Accounts
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Withdrawal
Last modified 5mo ago
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Contents
Step 1: Alice Deposits Funds On-Chain
Step 2: Off-Chain Deposit Transaction
Step 3: Deposit Included in a Batch
Step 4: Remove Funds from the Pending Deposits Area