How to open multiple terminals using docker?

Here I am trying to create private ethereum instance using dockerfile. I want to open two terminals and run command1 in terminal1 and execute command2 in terminal2 only when command1 returns true. Commands are shown below: Command1: geth –verbosity 4 –port 3000 –networkid –datadir=/ethereum –rpc –rpcport 8545 –rpcaddr 127.0.0.1 –rpccorsdomain “*” –rpcapi “eth, net, web3…

Are there any risks of undefined behavior when calling a function which doesn’t return anything using a prototype of it which returns bool?

According to the ERC-20 Token Standard, functions transfer and transferFrom should return a boolean value indicating success or failure: interface IERC20Token { function transfer(address _to, uint256 _value) public returns (bool); function transferFrom(address _from, address _to, uint256 _value) public returns (bool); } Nevertheless, there are quite a few ERC-20 Token contracts which were deployed on mainnet…

What are some potential scenarios that a state actor can harm bitcoin if they control more than 51% of the hashing power?

As reported recently, China controls more than 51% of the hashing power and just in one province in China controls 54%. Assuming China has bad intentions and forces all these mining operators to collude to harm the Bitcoin network. What are some of the potential scenarios to dethrone bitcoin from the #1 spot? From my…