func messageToHex(msg wire.Message) (string, error) {
var buf bytes.Buffer
if err := msg.BtcEncode(&buf, 70002); err != nil {
return "", fmt.Errorf(fmt.Sprintf("Failed to encode msg of type %T", msg))
}
return hex.EncodeToString(buf.Bytes()), nil
}
// messageSummary returns a human-readable string which summarizes a message.
// Not all messages have or need a summary. This is used for debug logging.
func messageSummary(msg wire.Message) string {
switch msg := msg.(type) {
case *wire.MsgVersion:
return fmt.Sprintf("agent %s, pver %d, block %d",
msg.UserAgent, msg.ProtocolVersion, msg.LastBlock)
case *wire.MsgVerAck:
// No summary.
case *wire.MsgGetAddr:
// No summary.
case *wire.MsgAddr:
return fmt.Sprintf("%d addr", len(msg.AddrList))
case *wire.MsgPing:
// No summary - perhaps add nonce.
case *wire.MsgPong:
// No summary - perhaps add nonce.
case *wire.MsgAlert:
// No summary.
case *wire.MsgMemPool:
// No summary.
case *wire.MsgTx:
hash, _ := msg.TxSha()
return fmt.Sprintf("hash %s, %d inputs, %d outputs, lock %s",
hash, len(msg.TxIn), len(msg.TxOut),
formatLockTime(msg.LockTime))
case *wire.MsgBlock:
header := &msg.Header
hash, _ := msg.BlockSha()
return fmt.Sprintf("hash %s, ver %d, %d tx, %s", hash,
header.Version, len(msg.Transactions), header.Timestamp)
case *wire.MsgInv:
return invSummary(msg.InvList)
case *wire.MsgNotFound:
return invSummary(msg.InvList)
case *wire.MsgGetData:
return invSummary(msg.InvList)
case *wire.MsgGetBlocks:
return locatorSummary(msg.BlockLocatorHashes, &msg.HashStop)
case *wire.MsgGetHeaders:
return locatorSummary(msg.BlockLocatorHashes, &msg.HashStop)
case *wire.MsgHeaders:
return fmt.Sprintf("num %d", len(msg.Headers))
case *wire.MsgReject:
// Ensure the variable length strings don't contain any
// characters which are even remotely dangerous such as HTML
// control characters, etc. Also limit them to sane length for
// logging.
rejCommand := sanitizeString(msg.Cmd, wire.CommandSize)
rejReason := sanitizeString(msg.Reason, maxRejectReasonLen)
summary := fmt.Sprintf("cmd %v, code %v, reason %v", rejCommand,
msg.Code, rejReason)
if rejCommand == wire.CmdBlock || rejCommand == wire.CmdTx {
summary += fmt.Sprintf(", hash %v", msg.Hash)
}
return summary
}
// No summary for other messages.
return ""
}