67 lines
1.9 KiB
Go
67 lines
1.9 KiB
Go
package config
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import (
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host "github.com/libp2p/go-libp2p-host"
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transport "github.com/libp2p/go-libp2p-transport"
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tptu "github.com/libp2p/go-libp2p-transport-upgrader"
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)
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// TptC is the type for libp2p transport constructors. You probably won't ever
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// implement this function interface directly. Instead, pass your transport
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// constructor to TransportConstructor.
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type TptC func(h host.Host, u *tptu.Upgrader) (transport.Transport, error)
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var transportArgTypes = argTypes
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// TransportConstructor uses reflection to turn a function that constructs a
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// transport into a TptC.
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//
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// You can pass either a constructed transport (something that implements
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// `transport.Transport`) or a function that takes any of:
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//
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// * The local peer ID.
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// * A transport connection upgrader.
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// * A private key.
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// * A public key.
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// * A Host.
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// * A Network.
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// * A Peerstore.
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// * An address filter.
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// * A security transport.
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// * A stream multiplexer transport.
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// * A private network protector.
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//
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// And returns a type implementing transport.Transport and, optionally, an error
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// (as the second argument).
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func TransportConstructor(tpt interface{}) (TptC, error) {
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// Already constructed?
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if t, ok := tpt.(transport.Transport); ok {
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return func(_ host.Host, _ *tptu.Upgrader) (transport.Transport, error) {
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return t, nil
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}, nil
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}
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ctor, err := makeConstructor(tpt, transportType, transportArgTypes)
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if err != nil {
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return nil, err
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}
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return func(h host.Host, u *tptu.Upgrader) (transport.Transport, error) {
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t, err := ctor(h, u)
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if err != nil {
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return nil, err
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}
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return t.(transport.Transport), nil
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}, nil
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}
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func makeTransports(h host.Host, u *tptu.Upgrader, tpts []TptC) ([]transport.Transport, error) {
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transports := make([]transport.Transport, len(tpts))
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for i, tC := range tpts {
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t, err := tC(h, u)
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if err != nil {
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return nil, err
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}
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transports[i] = t
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}
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return transports, nil
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}
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