a658fabf48
This commit adds a new restriction around funding channels at the daemon level: lnd nodes will not allow either the initiation or the acceptance of a channel before the node is fully synced to the best known chain. This fixes a class of bug that arises when a new node joins the network and either attempts to open a channel or has a channel extended to them before the node is fully synced to the network.
136 lines
3.9 KiB
Go
136 lines
3.9 KiB
Go
package lnwire
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import (
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"fmt"
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"io"
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"github.com/roasbeef/btcd/wire"
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"google.golang.org/grpc/codes"
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)
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// ErrorCode represents the short error code for each of the defined errors
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// within the Lightning Network protocol spec.
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type ErrorCode uint16
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// ToGrpcCode is used to generate gRPC specific code which will be propagated
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// to the ln rpc client. This code is used to have more detailed view of what
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// goes wrong and also in order to have the ability pragmatically determine
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// the error and take specific actions on the client side.
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func (e ErrorCode) ToGrpcCode() codes.Code {
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return (codes.Code)(e) + 100
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}
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const (
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// ErrMaxPendingChannels is returned by remote peer when the number of
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// active pending channels exceeds their maximum policy limit.
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ErrMaxPendingChannels ErrorCode = 1
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// ErrSynchronizingChain is returned by a remote peer that receives a
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// channel update or a funding request while their still syncing to the
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// latest state of the blockchain.
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ErrSynchronizingChain ErrorCode = 2
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)
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// ErrorGeneric represents a generic error bound to an exact channel. The
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// message format is purposefully general in order to allow expression of a wide
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// array of possible errors. Each ErrorGeneric message is directed at a particular
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// open channel referenced by ChannelPoint.
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type ErrorGeneric struct {
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// ChannelPoint references the active channel in which the error
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// occurred within. A ChannelPoint of zeroHash:0 denotes this error
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// applies to the entire established connection.
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ChannelPoint *wire.OutPoint
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// PendingChannelID allows peers communicate errors in the context of a
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// particular pending channel. With this field, once a peer reads an
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// ErrorGeneric message with the PendingChannelID field set, then they
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// can forward the error to the fundingManager who can handle it
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// properly.
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PendingChannelID uint64
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// Code is the short error ID which describes the nature of the error.
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Code ErrorCode
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// Problem is a human-readable string further elaborating upon the
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// nature of the exact error. The maximum allowed length of this
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// message is 8192 bytes.
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Problem string
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}
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// NewErrorGeneric creates a new ErrorGeneric message.
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func NewErrorGeneric() *ErrorGeneric {
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return &ErrorGeneric{}
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}
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// A compile time check to ensure ErrorGeneric implements the lnwire.Message
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// interface.
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var _ Message = (*ErrorGeneric)(nil)
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// Decode deserializes a serialized ErrorGeneric message stored in the
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// passed 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 (c *ErrorGeneric) Decode(r io.Reader, pver uint32) error {
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// ChannelPoint(8)
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// Problem
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err := readElements(r,
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&c.ChannelPoint,
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&c.Code,
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&c.Problem,
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&c.PendingChannelID,
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)
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if err != nil {
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return err
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}
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return nil
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}
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// Encode serializes the target ErrorGeneric into the passed io.Writer
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// observing 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 (c *ErrorGeneric) Encode(w io.Writer, pver uint32) error {
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err := writeElements(w,
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c.ChannelPoint,
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c.Code,
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c.Problem,
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c.PendingChannelID,
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)
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if err != nil {
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return err
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}
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return nil
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}
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// Command returns the integer uniquely identifying an ErrorGeneric message on
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// the wire.
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//
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// This is part of the lnwire.Message interface.
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func (c *ErrorGeneric) Command() uint32 {
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return CmdErrorGeneric
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}
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// MaxPayloadLength returns the maximum allowed payload size for a
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// ErrorGeneric 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 (c *ErrorGeneric) MaxPayloadLength(uint32) uint32 {
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// 8+8192
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return 8208
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}
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// Validate performs any necessary sanity checks to ensure all fields present
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// on the ErrorGeneric are valid.
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//
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// This is part of the lnwire.Message interface.
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func (c *ErrorGeneric) Validate() error {
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if len(c.Problem) > 8192 {
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return fmt.Errorf("problem string length too long")
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}
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// We're good!
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return nil
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}
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