The team behind #fractal has shared insights from their experience using #OP_CAT on the mainnet, particularly related to the Replace-By-Fee (RBF) mechanism. After launching their first dapp and seeing significant trading volume and user engagement, they encountered challenges with OP_CAT transactions during peak events when transaction fees spiked.

They discovered that OP_CAT transactions are structured differently than standard Bitcoin transactions, as they involve concatenating multiple outputs into a chain. This complexity made RBF more difficult because updating the fee required recreating the entire transaction chain rather than just adjusting a single transaction.

To address this, they developed a method to identify and recreate the full transaction chain with updated fees for any pending transactions in the #mempool . While this approach has improved the situation, some transactions still remain pending.

The team emphasized that building on the mainnet provides invaluable learning experiences, and they encourage others interested in contributing to #fractalbitcoin to reach out for support and collaboration.

$FB