62 lines
2.5 KiB
Go
62 lines
2.5 KiB
Go
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// Package chaincfg defines chain configuration parameters.
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//
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// In addition to the main Bitcoin network, which is intended for the transfer
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// of monetary value, there also exists two currently active standard networks:
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// regression test and testnet (version 3). These networks are incompatible
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// with each other (each sharing a different genesis block) and software should
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// handle errors where input intended for one network is used on an application
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// instance running on a different network.
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//
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// For library packages, chaincfg provides the ability to lookup chain
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// parameters and encoding magics when passed a *Params. Older APIs not updated
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// to the new convention of passing a *Params may lookup the parameters for a
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// wire.BitcoinNet using ParamsForNet, but be aware that this usage is
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// deprecated and will be removed from chaincfg in the future.
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//
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// For main packages, a (typically global) var may be assigned the address of
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// one of the standard Param vars for use as the application's "active" network.
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// When a network parameter is needed, it may then be looked up through this
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// variable (either directly, or hidden in a library call).
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//
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// package main
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//
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// import (
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// "flag"
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// "fmt"
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// "log"
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//
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// "github.com/btcsuite/btcutil"
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// "github.com/btcsuite/btcd/chaincfg"
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// )
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//
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// var testnet = flag.Bool("testnet", false, "operate on the testnet Bitcoin network")
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//
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// // By default (without -testnet), use mainnet.
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// var chainParams = &chaincfg.MainNetParams
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//
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// func main() {
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// flag.Parse()
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//
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// // Modify active network parameters if operating on testnet.
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// if *testnet {
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// chainParams = &chaincfg.TestNet3Params
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// }
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//
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// // later...
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//
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// // Create and print new payment address, specific to the active network.
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// pubKeyHash := make([]byte, 20)
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// addr, err := btcutil.NewAddressPubKeyHash(pubKeyHash, chainParams)
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// if err != nil {
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// log.Fatal(err)
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// }
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// fmt.Println(addr)
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// }
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//
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// If an application does not use one of the three standard Bitcoin networks,
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// a new Params struct may be created which defines the parameters for the
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// non-standard network. As a general rule of thumb, all network parameters
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// should be unique to the network, but parameter collisions can still occur
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// (unfortunately, this is the case with regtest and testnet3 sharing magics).
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package chaincfg
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