Exchange Wallet System Development Process

Building a Blockchain Wallet Node

1. USDT/BTC Implementation

(1) Setting Up BTC/USDT Nodes

• Deploy and synchronize BTC/USDT nodes using OmniCore.
• Git Repository: OmniCore GitHub (supports BTC natively).

(2) Synchronization Verification

• Compare node height with BTC Block Explorer using omnicore-cli getblockchaininfo.

2. ERC20/ETH Implementation

(1) Deploying ETH Nodes

• Use multi-geth for node setup.
• Git Repository: multi-geth releases.

(2) Synchronization Check

• Verify sync status via Etherscan using geth attach or RPC method eth_syncing.

Exchange Wallet System Architecture

👉 Best practices for secure wallet integration

Key Database Tables

1. Member Wallet Table

   • Fields: Member ID, Currency, Balance, Frozen Balance, Deposit Address.

   • Logic:

     • Credit balance on deposit.
     • Freeze balance during withdrawals; adjust based on transaction status.

2. Deposit Records Table

   • Fields: TXID, Deposit Address, Member ID, Amount, Timestamp.
   • Logic: Prevent duplicate entries via TXID/address validation.

3. Withdrawal Approval Table

   • Fields: Withdrawal ID, Member ID, Currency, Destination Address, Amount, Status, TXID.

   • Logic:

     • Track withdrawal requests.
     • Update status based on blockchain confirmation.

4. Supported Currencies Table

   • Fields: Currency, Type.
   • Logic: Restrict withdrawals to listed currencies.

Deposit/Withdrawal Integration

Address Generation

1. Create wallets on deployed nodes.
2. Generate addresses via RPC.
3. Assign addresses to user accounts.

Transaction Logic

1. Query blockchain height.
2. Process new blocks sequentially.
3. Validate deposits by checking recipient addresses.
4. Monitor withdrawal TX statuses (success/failure).

RPC Commands & Workflows

USDT/BTC Commands

• Address Creation:

  bitcoin-cli getnewaddress "receive"

• RPC Methods:

  • getbestblockhash (latest height).
  • getblock (block details).
  • sendrawtransaction (broadcast TX).

👉 Optimize your node performance

ERC20/ETH Commands

• Account Management:

  geth attach
  eth.accounts  # List accounts
  personal.newAccount()  # Create account

• RPC Methods:

  • eth_blockNumber (sync status).
  • eth_sendRawTransaction (signed TX broadcast).

FAQ Section

Q1: How do I verify node synchronization?

A: Compare local node height with a block explorer using getblockchaininfo (BTC) or eth.syncing (ETH).

Q2: What’s the best practice for handling failed withdrawals?

A: Automatically revert frozen balances and notify users if the TX fails on-chain.

Q3: How often should I sync my node?

A: Continuous sync is ideal. Monitor latency and adjust resources accordingly.

Q4: Can I support multiple currencies in one wallet system?

A: Yes, but ensure separate tables/logics for each currency to avoid conflicts.