Topic
PolygonAdvancedStore block hashes, verify each block's parentHash, and on mismatch roll back to the common ancestor and re-index. Fetch logs by block hash and act irreversibly only on finalized blocks.
#indexing#nodes#transactions
GeneralIntermediateOn Bitcoin, scale confirmation depth with the amount at risk, since finality is probabilistic. On Ethereum, wait for the finalized checkpoint. On rollups, wait for the batch to be final on L1.
#consensus#transactions
EthereumBeginnerIt's usually a max fee below the base fee, a low tip, or an earlier stuck nonce. Speed up by resending with the same nonce and higher fees; cancel by sending 0 ETH to yourself with that nonce.
#gas-&-fees#transactions#troubleshooting
BitcoinIntermediateA stuck transaction pays too low a feerate. The sender can replace it with a higher-fee version (RBF), or anyone with an output can spend it in a high-fee child so the package gets mined (CPFP).
#transactions#troubleshooting
GeneralBeginnerBitcoin tracks unspent outputs and wallets compute balances, with implicit fees and change outputs. Ethereum stores a balance and nonce per account, so nonce management replaces coin selection.
#basics#transactions
SolanaIntermediateFetch the blockhash at confirmed commitment right before signing, add a priority fee, and rebroadcast the same signed bytes until confirmed or past lastValidBlockHeight; only then re-sign.
#transactions#troubleshooting
EthereumIntermediateNonce too low means that nonce is already used; underpriced means a pending tx holds it and you didn't raise both fee fields enough. Pick nonces from "pending" and serialize sends per key.
#ethers.js#transactions#troubleshooting
