A Solana WebSocket subscription is a way to receive real-time notifications from the blockchain over a single open connection, instead of repeatedly asking an endpoint whether something changed. You open a WebSocket, send a subscription request such as accountSubscribe, and…
To benchmark an RPC provider, send thousands of real JSON-RPC requests to its endpoint, record how long each one takes, and report the results as percentiles (p50, p95, p99) and a success rate, not an average. Do this from more…
Solana priority fees are an optional payment you attach to a transaction so validators schedule it ahead of others when blockspace is contested. You set the fee per unit of computation, and the scheduler tends to fill blocks with the…
You read the Bitcoin mempool in one of three ways: Bitcoin Core’s JSON-RPC methods like getrawmempool, the indexed Blockbook API through endpoints such as /api/v2/tx/<txid>, or a visual explorer like mempool.space. Which one fits depends on whether you want raw…
TronWeb is the JavaScript library you use to put a smart contract on TRON and then call it. You write the contract in Solidity, compile it with TronBox or TronIDE, and use TronWeb to deploy the compiled bytecode and trigger…
An Ethereum address is derived from a private key, and you can create one in a few lines of code without a website, browser extension, or hosted service. The private key comes from a secure random source, and the address…
To sign an Ethereum transaction offline, you build the transaction, sign it locally with your private key, and get back a serialized blob of hex. Then you hand that blob to the network with eth_sendRawTransaction, which checks it and drops…
To send an EIP-1559 transaction in Python, you build a Type 2 transaction with two fee fields — maxFeePerGas and maxPriorityFeePerGas — sign it with your private key, and broadcast it using web3.py’s send_raw_transaction. That’s the whole flow. What trips…
eth_getLogs is the Ethereum JSON-RPC method that returns every event log matching a filter you supply — a contract address, a block range, and a set of topics. It’s the standard way to pull historical crypto logs after the fact:…
Forking Ethereum mainnet means running a local copy of the live chain on your own machine, seeded with real mainnet data. You get the actual deployed contracts, token balances, and protocol state, but every transaction you send stays local and…