Usual causes: slippage too low, price moved, not enough gas, or a contract that blocks sells.
How to check it yourself
- Open the failed transaction on the explorer and read the status or error line.
- Check your slippage setting, your gas balance and whether the price moved.
- If buys work but sells fail, run the contract through a scanner for sell blocks.
Sources
- bitcoin.taxhttps://bitcoin.tax/blog/?p=42420
- docs.webacy.comhttps://docs.webacy.com/guides/dex-token-screening
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