TODO

- eth_newBlockFilter
- eth_newPendingTransactionFilter

[TODO: Rename to `--abi-decode-result'?]
Usage: seth --abi-decode <name>(<in-types>)(<out-types>) <hexdata>

[TODO: Add `-h' option?]
Usage: seth balance [-B <block>] <account>

[TODO: Add <block> argument to find the number of a specific block?]
Usage: seth block-number

[TODO: Allow <block> to be `current' (also defaulting to `latest')?]
[TODO: Allow setting the second parameter of `eth_getBlockByHash'?]
Usage: seth block [-j|--json] <block> [<field>]

[TODO: Allow passing <text> through standard input?]
Usage: seth --from-ascii <text>...

[TODO: Add `-h' option?]
Usage: seth gas-price

[TODO: Allow passing <hexdata> through standard input?]
Usage: seth keccak <hexdata>

[TODO: Allow more than one address?]
[TODO: Allow other filter options?]
Usage: seth logs [-B <block>] [--follow] <address>

[TODO: Add `-h' option?]
Usage: seth ls

[TODO: Allow passing <hexdata> through standard input?]
Usage: seth sign [-F <sender>] <hexdata>

[TODO: Remove?]
Usage: seth --to-wei <amount> [<unit>]