Although it is possible to get the command name for each msg type by
creating an instances of the type and calling the Command method against
it, it's slightly more efficient to simply allows callers to have direct
access to the exported constants.
This is currently really useful for the reject message since callers need
to be able to examine the command type to determine whether or not the
hash field needs to be included.
Rather than using bytes.NewBuffer, which is a read/write entity
(io.ReadWriter), use bytes.NewReader which is only a read entitiy
(io.Reader) in all cases where it is possible. Benchmarking shows it's
slightly faster and it's also technically more accurate since it ensures
the data is read-only.
There are a few cases where bytes.NewBuffer must still be used since a
buffer with a known length is required for those instances.
This commit adds the new reject protocol message added to recent versions
of the reference implementation. This message is intended to be used in
response to messages from a remote peer when it is rejected for some
reason such as blocks being rejected due to not conforming to the chain
rules, transactions double spending inputs, and version messages sent
after they're already sent.
This is work toward issue #9.
serialization buffer in MsgTx's TxSha().
Benchmarking shows this is slightly faster due to avoiding the extra
garbage collection in addition to less peak memory usage.
Before: BenchmarkTxShaOld 500000 5626 ns/op
After: BenchmarkTxShaNew 500000 5457 ns/op
This commit adds two new funtions named ReadMessageN and WriteMessageN
which return an additional paramter for the number of bytes read or written,
respectively.
It also adds tests to ensure the number of bytes read and written are the
expected values both for successful reads/writes and unsuccessful ones.
Closes#6.
This commit changes MsgBlock to enforce a 1MB max payload per the spec.
Previously it was only limited to the max overall message size. While
here, also enforce max payloads per message type (instead of only the max
overall message payload) when writing messages.
The io.Writer.Write function always returns an error if the bytes written
is less than provided, so there is no reason to further check if the
payload length matches after a successful write.
This commit adds a new MessageError type that is intended to allow the
caller to differentiate between general io errors and and errors that
resulted from malformed messages.
The io.ReadFull function always returns an error if the full payload can't
be read, so there is no reason to further check if the payload length
matches after a successful read.
