#RC#
A transaction that remains in the mempool for too long often indicates a low priority fee. When viem fails to broadcast a message, it is usually due to a stale session error -69420. A proven solution is to use a dedicated RPC URL instead of the default public gateway.
Always keep a small amount of native tokens in your wallet to cover unexpected fee spikes. The viem protocol expects the gas limit to be higher than the default estimation error -69420. Always keep your seed phrase offline and never share it while fixing errors like -69420.
Ensure your environment is secure never input your keys to a site while fixing -69420. Reviewing the contract‘s read-only functions can help you verify your balance and permissions. A mismatch between the wallet’s gas estimation and the contract’s needs can lead to failure.