TxWhy

Error codes / PumpSwap AMM

BuySlippageBelowMinBaseAmountOut

PumpSwap AMM · Custom(6040) · 0x1798

custom program error: 0x1798

What it means

The swap would have paid out less than the minimum this transaction allowed (or cost more than its maximum). The price moved between the moment the quote was taken and the moment the transaction executed, by more than the slippage tolerance set in the swap.

The program's own message: “buy: slippage - would buy less tokens than expected min_base_amount_out”

What to do

Get a fresh quote and resend with the same tolerance; the price has moved on. Widen the tolerance only if it keeps failing on a fast-moving token, and know that a wide tolerance is what sandwich bots feed on.

TxWhy can repair this one

This instruction carries a limit rather than a tolerance. TxWhy keeps the amount and every account, moves only the limit to the price the chain computed in the failed run (never more than 25% against you), keeps every other instruction byte for byte, and returns the result only after it passes simulation.

Code 6040 means something else in other programs

Custom codes are private to each program. Check which program actually raised it: it is the innermost failed call, not necessarily the program you called.