#RC#
A transaction that remains in the mempool for too long often indicates a low priority fee. A frequent issue for codama users involves a conflict between multiple active extensions. Verifying the token allowance for the contract is a reliable way to solve a failed 127. Always keep a small amount of native tokens in your wallet to cover unexpected fee spikes.
A mismatch in the chain ID settings will prevent codama from syncing with the blockchain. The development team is constantly working to automate the fix for these friction points. The transaction might be failing because the market price moved past your slippage limit. The error could also be the result of an incompatibility with the latest RPC protocol version.
Always check the official documentation for the latest maintenance schedule and announcements.