Parsing gas from float value is not always a right idea as
a transform from float is not 1-to-1.
This commit implements Fixed8Flag which parses Fixed8 value from string.
Right now a bizarre error message can occur if an address flag was not
set: `wallet contains no account for 'AFmseVrdL9f9oyCzZefL9tG6UbvhPbdYzM'`.
This bug is 10x worse if it occures in `transfer` --from flag.
Implement ability to sign transactions with multisig address.
This should be done in several steps:
1. Create TX with `wallet transfer --out <file>`
2. Sign TX with `wallet multisign sign --in <file> --out <file2>`.
3. Repeat 2 for every party.
Input file contains transaction with possibly incomplete
set of the signatures. Output file will contain the same tx
with updated signature set.
When --rpc flag is provided, result transaction is sent
via `sendrawtransaction`.
GAS can be claimed via `wallet claim` command.
This will claim first get all claimable outputs via
`getclaimable` RPC and then form a transaction signed
byte the private key from the wallet.
One positional argument can be provided. If so, it is
interpreted as address and only WIFs corresponding to it
are exported. If address is provided '--decrypt' flag can be
specified to export unencrypted WIFs.
* Initial draft of the neo-go wallet
* Cleanup + more test for util package
* integrated wallet into neo-cli partially
* base wallet implementation + smartcontract code.
