2021-11-12 17:06:13 -05:00
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package electrum
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2021-01-29 16:51:08 -05:00
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import "sync/atomic"
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// ServerProvider manages a rotating server list, from which callers can pull server addresses.
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type ServerProvider struct {
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nextIndex int32
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servers []string
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}
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// NewServerProvider returns an initialized ServerProvider.
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func NewServerProvider(servers []string) *ServerProvider {
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return &ServerProvider{
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nextIndex: -1,
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servers: servers,
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}
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}
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// NextServer returns an address from the rotating list. It's thread-safe.
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func (p *ServerProvider) NextServer() string {
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index := int(atomic.AddInt32(&p.nextIndex, 1))
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return p.servers[index%len(p.servers)]
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}
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// PublicServers list.
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//
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// This list was taken from Electrum repositories, keeping TLS servers and excluding onion URIs.
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// It was then sorted into sections using the `cmd/survey` program, to prioritize the more reliable
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// servers with batch support.
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//
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// See https://github.com/spesmilo/electrum/blob/master/electrum/servers.json
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// See https://github.com/kyuupichan/electrumx/blob/master/electrumx/lib/coins.py
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// See `cmd/survey/main.go`
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var PublicServers = []string{
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// Fast servers with batching
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"electrum.coinext.com.br:50002", // impl: ElectrumX 1.14.0, batching: true, ttc: 0.15, speed: 113, from:
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"fulcrum.sethforprivacy.com:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.55, speed: 96, from:
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"mainnet.foundationdevices.com:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.54, speed: 88, from:
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"btc.lastingcoin.net:50002", // impl: Fulcrum 1.7.0, batching: true, ttc: 0.74, speed: 73, from:
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"vmd71287.contaboserver.net:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.60, speed: 70, from:
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"de.poiuty.com:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.87, speed: 70, from:
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"electrum.jochen-hoenicke.de:50006", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.83, speed: 69, from:
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"btc.cr.ypto.tech:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.81, speed: 65, from:
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"e.keff.org:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.82, speed: 65, from:
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"vmd104014.contaboserver.net:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.58, speed: 64, from:
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"e2.keff.org:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.83, speed: 64, from:
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"fulcrum.grey.pw:51002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.81, speed: 63, from:
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"fortress.qtornado.com:443", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.84, speed: 62, from:
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"f.keff.org:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.89, speed: 62, from:
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"2ex.digitaleveryware.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.71, speed: 61, from:
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"electrum.petrkr.net:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.84, speed: 58, from:
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"electrum.stippy.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.80, speed: 57, from:
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"electrum0.snel.it:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.80, speed: 56, from:
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"ru.poiuty.com:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.99, speed: 56, from:
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"electrum.privateservers.network:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 0.85, speed: 49, from:
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"btc.electroncash.dk:60002", // impl: Fulcrum 1.9.0, batching: true, ttc: 0.92, speed: 48, from:
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"bitcoin.aranguren.org:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 1.19, speed: 48, from:
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"electrum.bitcoinserver.nl:50514", // impl: Fulcrum 1.8.1, batching: true, ttc: 0.85, speed: 44, from:
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"btc.prompt.cash:61002", // impl: Fulcrum 1.8.1, batching: true, ttc: 1.22, speed: 44, from:
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"fulc.bot.nu:50002", // impl: Fulcrum 1.7.0, batching: true, ttc: 1.04, speed: 35, from:
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"bolt.schulzemic.net:50002", // impl: Fulcrum 1.8.2, batching: true, ttc: 0.96, speed: 33, from:
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"node1.btccuracao.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.90, speed: 25, from:
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// Other servers
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"xtrum.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.91, speed: 19, from: fulcrum.sethforprivacy.com:50002
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"electrum.bitaroo.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.04, speed: 19, from:
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"btce.iiiiiii.biz:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.07, speed: 19, from: electrum.coinext.com.br:50002
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"electrum.emzy.de:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.17, speed: 19, from:
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"alviss.coinjoined.com:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 1.15, speed: 17, from:
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"2AZZARITA.hopto.org:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.81, speed: 16, from: electrum.coinext.com.br:50002
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"vmd104012.contaboserver.net:50002", // impl: Fulcrum 1.9.0, batching: true, ttc: 1.25, speed: 16, from:
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"electrum.bitcoinlizard.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 4.99, speed: 14, from:
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"btc.ocf.sh:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.19, speed: 12, from:
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"bitcoins.sk:56002", // impl: ElectrumX 1.14.0, batching: true, ttc: 0.80, speed: 11, from:
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"electrum-btc.leblancnet.us:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.04, speed: 11, from:
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"helicarrier.bauerj.eu:50002", // impl: ElectrumX 1.10.0, batching: true, ttc: 0.96, speed: 10, from:
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"electrum.neocrypto.io:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.69, speed: 7, from:
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"caleb.vegas:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.71, speed: 7, from:
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"smmalis37.ddns.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.77, speed: 7, from:
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"2azzarita.hopto.org:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.78, speed: 7, from: fulcrum.sethforprivacy.com:50002
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"electrum.kendigisland.xyz:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.79, speed: 7, from:
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"electrum.hsmiths.com:50002", // impl: ElectrumX 1.10.0, batching: true, ttc: 0.90, speed: 7, from:
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"vmd63185.contaboserver.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.92, speed: 7, from:
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"blkhub.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.94, speed: 7, from:
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"electrum.mmitech.info:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.95, speed: 7, from:
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"elx.bitske.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.17, speed: 7, from:
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"bitcoin.lu.ke:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.21, speed: 7, from:
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"ex05.axalgo.com:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.21, speed: 7, from:
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"walle.dedyn.io:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.23, speed: 7, from:
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"eai.coincited.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.34, speed: 6, from:
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"2electrumx.hopto.me:56022", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.93, speed: 6, from:
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"hodlers.beer:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.03, speed: 6, from:
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"kareoke.qoppa.org:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.13, speed: 6, from:
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"ASSUREDLY.not.fyi:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.85, speed: 4, from:
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"electrumx.alexridevski.net:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.87, speed: 4, from:
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"assuredly.not.fyi:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 0.90, speed: 4, from:
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"ragtor.duckdns.org:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.07, speed: 4, from:
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"surely.not.fyi:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.20, speed: 4, from:
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"btc.electrum.bitbitnet.net:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 0.71, speed: 3, from:
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"gods-of-rock.screaminglemur.net:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 0.92, speed: 3, from:
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"SURELY.not.fyi:50002", // impl: ElectrumX 1.16.0, batching: true, ttc: 1.35, speed: 3, from:
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"horsey.cryptocowboys.net:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 0.61, speed: 2, from:
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"electrumx-btc.cryptonermal.net:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 0.83, speed: 1, from:
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"electrum.coineuskal.com:50002", // impl: ElectrumX 1.15.0, batching: true, ttc: 1.73, speed: 0, from: electrum.coinext.com.br:50002
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}
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