This tool can be used to build and sign transactions offline to be sent to a network, or with a node running in the background to send from the command line, or send to a remote node. You can generate a key to use or use a json wallet from Parity.
cargo run keygen
cargo run test
cargo run decrypt <keyfile> <password>
If you have a node running, the program will try and infer nonce, gasprice, and gaslimit.
cargo run transaction <keyfile> <password> <to> [<nonce> <value> <calldata> <gasprice> <gaslimit>]