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EthereumIntermediateUpdate state before any external call (checks-effects-interactions), add nonReentrant to every function sharing that state, and treat token hooks and user-supplied addresses as external calls.
#security#smart-contracts#solidity
SolanaBeginnerSome account would end the transaction with more than zero lamports but less than its rent-exempt minimum. Find it by index, then fund it fully, sweep it to zero, or fund your reallocs.
#rust#smart-contracts#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
EthereumIntermediateThe EVM hit a REVERT and undid the call. The reason is in the revert data: decode Error(string), Panic codes and custom errors with ethers, or replay a failed transaction with cast run.
#smart-contracts#solidity#troubleshooting
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
BitcoinBeginnerMiners hash an 80-byte block header until its double SHA-256 falls below a target. Difficulty retargets every 2016 blocks, and nodes follow the chain with the most cumulative work.
#basics#consensus#mining
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
AlgorandBeginnerIn this article, I will explain how to mint NFTs in Algoarand Blockchain.
#nfts
GeneralBeginnerIn this article, I will discuss how the proposed idea of The Block Head's Web 5.0
#web-5.0
GeneralBeginnerWeb 4.0 - The upcoming revolution
#web-3#web-3.0
GeneralBeginnerIn this article, I will discuss what is web 5.0? and its advantages over web 3.0?
#web-3.0#web-5.0
GeneralIntermediateUnder this analysis, this Web 2.0 article contains conviction about Technologies and Tools in our study phase and teaching phase. Day by Day new technologies replace everyone in its upcoming paradigm headway and there is no one intact with its impact.
