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7f1be39d45
This commit is a large refactor that moves over various responsibilities from the ChannelRouter to the graph.Builder. These include all graph related tasks such as: - graph pruning - validation of new network updates & persisting new updates - notifying topology update clients of any changes. This is a large commit but: - many of the files are purely moved from `routing` to `graph` - the business logic put in the graph Builder is copied exactly as is from the ChannelRouter with one exception: - The ChannelRouter just needs to be able to call the Builder's `ApplyChannelUpdate` method. So this is now exported and provided to the ChannelRouter as a config option. - The trickiest part was just moving over the test code since quite a bit had to be duplicated.
84 lines
2.4 KiB
Go
84 lines
2.4 KiB
Go
package graph
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import "github.com/go-errors/errors"
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// errorCode is used to represent the various errors that can occur within this
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// package.
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type errorCode uint8
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const (
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// ErrOutdated is returned when the routing update already have
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// been applied, or a newer update is already known.
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ErrOutdated errorCode = iota
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// ErrIgnored is returned when the update have been ignored because
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// this update can't bring us something new, or because a node
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// announcement was given for node not found in any channel.
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ErrIgnored
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// ErrChannelSpent is returned when we go to validate a channel, but
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// the purported funding output has actually already been spent on
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// chain.
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ErrChannelSpent
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// ErrNoFundingTransaction is returned when we are unable to find the
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// funding transaction described by the short channel ID on chain.
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ErrNoFundingTransaction
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// ErrInvalidFundingOutput is returned if the channel funding output
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// fails validation.
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ErrInvalidFundingOutput
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// ErrVBarrierShuttingDown signals that the barrier has been requested
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// to shutdown, and that the caller should not treat the wait condition
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// as fulfilled.
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ErrVBarrierShuttingDown
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// ErrParentValidationFailed signals that the validation of a
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// dependent's parent failed, so the dependent must not be processed.
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ErrParentValidationFailed
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)
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// graphError is a structure that represent the error inside the graph package,
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// this structure carries additional information about error code in order to
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// be able distinguish errors outside of the current package.
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type graphError struct {
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err *errors.Error
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code errorCode
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}
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// Error represents errors as the string
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// NOTE: Part of the error interface.
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func (e *graphError) Error() string {
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return e.err.Error()
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}
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// A compile time check to ensure graphError implements the error interface.
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var _ error = (*graphError)(nil)
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// newErrf creates a graphError by the given error formatted description and
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// its corresponding error code.
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func newErrf(code errorCode, format string, a ...interface{}) *graphError {
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return &graphError{
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code: code,
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err: errors.Errorf(format, a...),
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}
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}
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// IsError is a helper function which is needed to have ability to check that
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// returned error has specific error code.
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func IsError(e interface{}, codes ...errorCode) bool {
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err, ok := e.(*graphError)
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if !ok {
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return false
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}
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for _, code := range codes {
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if err.code == code {
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return true
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}
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}
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return false
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}
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