Working with USDC

The pump.fun / USDC launch configuration uses SPL USDC as the quote asset. It is parallel to the WSOL flow, but there is no SOL wrapping step and all loan accounting is USDC-denominated.

USDC in Moono

Property	Value
Mainnet mint	EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v
Decimals	6
Token program	SPL Token
Public method family	_2

The USDC quote vault has its own tick book, LP shares, borrowed balances, and NAV. Depositing into the USDC pool does not expose you to WSOL pool accounting, and WSOL pool events do not change USDC LP positions.

Borrowers

For a USDC launch you need:

• enough USDC for the loan costs shown in the launch form
• enough SOL for Solana transaction fees and account rent
• a registered Moono profile
• a launch preset tied to the pump.fun / USDC configuration

The app sends the USDC launch through the _2 instruction family: launch_2, launch_migrate_2, launch_complete_2, repay_2, and liquidate_2.

Liquidity Providers

USDC LPs deposit USDC into the USDC quote vault and choose a tick exactly like WSOL LPs. Earnings are paid in USDC:

• borrower interest
• shared interest
• LP share of liquidation surplus

Withdrawals and claim actions return USDC to your associated token account.

MTrade

USDC MTrade buy/sell uses the same quote asset as the market. The public trading methods are mtrade_buy_2, mtrade_buy_exact_quote_in_2, and mtrade_sell_2.

The on-chain program also has mtrade_migrate_2, but the public UI should expose a USDC migrate button only after the frontend helper and e2e coverage are in place.

Difference from WSOL

Topic	WSOL	USDC
Preparation	Native SOL may be wrapped automatically	Bring USDC directly
Decimals	9	6
Quote vault	WSOL vault	USDC vault
Public methods	_0	_2
Display unit	SOL / WSOL	USDC

For current USDC limits and costs, see Economics.