74 lines
2.2 KiB
Go
74 lines
2.2 KiB
Go
package lnwire
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import "io"
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// Init is the first message reveals the features supported or required by this
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// node. Nodes wait for receipt of the other's features to simplify error
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// diagnosis where features are incompatible. Each node MUST wait to receive
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// init before sending any other messages.
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type Init struct {
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// GlobalFeatures is a legacy feature vector used for backwards
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// compatibility with older nodes. Any features defined here should be
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// merged with those presented in Features.
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GlobalFeatures *RawFeatureVector
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// Features is a feature vector containing a the features supported by
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// the remote node.
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//
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// NOTE: Older nodes may place some features in GlobalFeatures, but all
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// new features are to be added in Features. When handling an Init
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// message, any GlobalFeatures should be merged into the unified
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// Features field.
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Features *RawFeatureVector
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}
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// NewInitMessage creates new instance of init message object.
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func NewInitMessage(gf *RawFeatureVector, f *RawFeatureVector) *Init {
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return &Init{
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GlobalFeatures: gf,
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Features: f,
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}
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}
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// A compile time check to ensure Init implements the lnwire.Message
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// interface.
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var _ Message = (*Init)(nil)
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// Decode deserializes a serialized Init message stored in the passed
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// io.Reader observing the specified protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (msg *Init) Decode(r io.Reader, pver uint32) error {
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return ReadElements(r,
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&msg.GlobalFeatures,
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&msg.Features,
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)
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}
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// Encode serializes the target Init into the passed io.Writer observing
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// the protocol version specified.
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//
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// This is part of the lnwire.Message interface.
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func (msg *Init) Encode(w io.Writer, pver uint32) error {
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return WriteElements(w,
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msg.GlobalFeatures,
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msg.Features,
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)
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}
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// MsgType returns the integer uniquely identifying this message type on the
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// wire.
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//
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// This is part of the lnwire.Message interface.
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func (msg *Init) MsgType() MessageType {
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return MsgInit
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}
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// MaxPayloadLength returns the maximum allowed payload size for an Init
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// complete message observing the specified protocol version.
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//
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// This is part of the lnwire.Message interface.
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func (msg *Init) MaxPayloadLength(uint32) uint32 {
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return 2 + 2 + maxAllowedSize + 2 + maxAllowedSize
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}
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