#RC#
A transaction staying in the mempool usually means the gas price was set too low for current demand. Always verify the mpl-token-metadata contract permissions before confirming a high-value transaction. Increasing the slippage tolerance to a slightly higher level can help bypass the execution revert. Many rejected transactions including 103 occur because the max fee is below the market rate.
The mpl-token-metadata interface might require you to re-approve the contract for added security. Learning how to read a block explorer can help you see exactly where a transaction failed. The transaction might be failing because the price moved past your slippage limit too fast. The move toward modular blockchain layers has introduced new types of synchronization errors.
Check the status of the sequencer to avoid 103 when moving assets to a rollup.
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