[Truffle] truffle compile/migrate does nothing fix

If truffle compile or truffle migrate hangs, try to run rm -rf build/ in your project directory, or in Windows delete "build" directory manually.

[Ethereum] Web3 "Couldn't connect to node" fix

If you have "Couldn't connect to node http://localhost:8545", check your web3 smart contract function arguments, maybe you're added redundant parameter ({value: ...} in my case). Worked on Parity v2.1.3 on Docker

[Ethereum] Remix: Uncaught JavaScript exception: RangeError: Maximum call stack size exceeded.

Try to use Firefox for this site instead of Chrome-based browsers.

[Ethereum] Chainlink Ropsten faucet doesn't sends LINK tokens

If https://ropsten.chain.link/ doesn't send test tokens to your wallet, try to use https://kovan.chain.link/ on Kovan, it worked to me.

[Ethereum] [Mist] geth runtime error: invalid memory address or nil pointer dereference

If you often receive mentioned error,  delete ~.config/Mist/mist.lokidb file on Linux at closed Mist client.