User-defined wait time for broadcasted transactions

[iamdefinitelyahuman]

Overview

Allow users to specify the number of confirmations they wish to wait for a transaction.

Specification

When broadcasting a transaction, the required_confs kwarg can determine how many confirmations to wait for. Value can be 0 for a non-blocking action that returns a pending TransactionReceipt. The default value is 1.

accounts[0].transfer(accounts[1], required_confs=n)
Token.transfer(accounts[1], 10000, {'from': accounts[0], 'required_confs': n)

Once a tx is broadcast, it should also be possible to wait for confirmations via a wait method. If the number of confirmations is already greater than n, nothing happens.

tx.wait(n)

Once this is added, the old and half-broken logic around CTRL-C in the console can also be removed.

[matnad]

starting on this