105 lines
3.2 KiB
Go
105 lines
3.2 KiB
Go
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// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// Contains all the wrappers from the accounts package to support client side enode
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// management on mobile platforms.
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package geth
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import (
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"errors"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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)
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// Enode represents a host on the network.
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type Enode struct {
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node *discv5.Node
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}
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// NewEnode parses a node designator.
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//
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// There are two basic forms of node designators
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// - incomplete nodes, which only have the public key (node ID)
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// - complete nodes, which contain the public key and IP/Port information
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//
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// For incomplete nodes, the designator must look like one of these
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//
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// enode://<hex node id>
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// <hex node id>
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//
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// For complete nodes, the node ID is encoded in the username portion
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// of the URL, separated from the host by an @ sign. The hostname can
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// only be given as an IP address, DNS domain names are not allowed.
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// The port in the host name section is the TCP listening port. If the
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// TCP and UDP (discovery) ports differ, the UDP port is specified as
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// query parameter "discport".
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//
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// In the following example, the node URL describes
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// a node with IP address 10.3.58.6, TCP listening port 30303
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// and UDP discovery port 30301.
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//
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// enode://<hex node id>@10.3.58.6:30303?discport=30301
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func NewEnode(rawurl string) (enode *Enode, _ error) {
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node, err := discv5.ParseNode(rawurl)
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if err != nil {
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return nil, err
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}
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return &Enode{node}, nil
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}
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// Enodes represents a slice of accounts.
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type Enodes struct{ nodes []*discv5.Node }
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// NewEnodes creates a slice of uninitialized enodes.
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func NewEnodes(size int) *Enodes {
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return &Enodes{
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nodes: make([]*discv5.Node, size),
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}
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}
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// NewEnodesEmpty creates an empty slice of Enode values.
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func NewEnodesEmpty() *Enodes {
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return NewEnodes(0)
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}
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// Size returns the number of enodes in the slice.
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func (e *Enodes) Size() int {
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return len(e.nodes)
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}
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// Get returns the enode at the given index from the slice.
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func (e *Enodes) Get(index int) (enode *Enode, _ error) {
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if index < 0 || index >= len(e.nodes) {
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return nil, errors.New("index out of bounds")
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}
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return &Enode{e.nodes[index]}, nil
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}
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// Set sets the enode at the given index in the slice.
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func (e *Enodes) Set(index int, enode *Enode) error {
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if index < 0 || index >= len(e.nodes) {
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return errors.New("index out of bounds")
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}
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e.nodes[index] = enode.node
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return nil
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}
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// Append adds a new enode element to the end of the slice.
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func (e *Enodes) Append(enode *Enode) {
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e.nodes = append(e.nodes, enode.node)
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}
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