Bitcoin - negativne stvari i kako ih popraviti
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to ce sigurno biti jedna od tema. samo sto se decentralizacije tice ona je umrla sa asic-ima. Tu je umro san o decentraliziranom miningu. A kako je mining ekstremno bitan za decentralizirano donosenje odluka, tako je gubitkom decentraliziranog mininga izgubljena i ona prava decentraliziranost bitcoina. Decentraliziranost odluka se trenutno cuva samo zahvaljujuci utjecaju velikih korisnika koji idu kontra minera a ne direktnim medjusobnim natjecanjem minera.
LN bi trebao oteti snagu minerima (i te kako ce ju imati i dalje, ali ipak manje) i dati opciju korisnicima da idu mimo minra. Mineri vise nece moci tako lako ucjenjivati korisnike kao sto sada rade.
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Biti će ovo nadasve zanimljiva godina za Bitcoin i ekipu koja ga hodla.........:mig:
Jer kao što se vidi ne razvija se samo LN, nego i masa drugih stvari. I kad se ovo provede 90% coina postaje obsolete............https://bitcoinmagazine.com/articles/keep-eye-out-these-bitcoins-tech-trends-2018/
In many ways, 2017 was Bitcoin’s best year yet. Most obviously, increased adoption made the pioneering cryptocurrency’s exchange rate skyrocket from under $1000 to well over 10 times that value.
[U]But from a tech perspective, things seem to be just getting started: 2018 promises to be the year that a number of highly anticipated projects are either launched or adopted.[/U]
Here’s a brief overview of some of the most promising upcoming technological developments to keep an eye on in the new year.Cheaper Transactions with Segregated Witness and a New Address Format
Segregated Witness (SegWit) was one of Bitcoin’s biggest — if not the biggest — protocol upgrade to date. Activated in August 2017, it fixed the long-standing malleability bug, in turn better enabling second-layer protocols. Additionally, SegWit replaced Bitcoin’s block size limit with a block weight limit, allowing for increased transactions throughout the network, thereby lowering fees per transaction.
However, adoption of the upgrade has been off to a relatively slow start. While some wallets and services are utilizing the added block space offered by SegWit, many others are not yet doing so. This means that, while Bitcoin is technically capable of supporting between two and four megabytes worth of transactions per ten minutes, it barely exceeds 1.1 megabytes.
This is set to change in 2018.
For one, the Bitcoin Core wallet interface will allow users to accept and send SegWit transactions. Bitcoin Core 0.16, scheduled for May 2018 (though this may be moved forward), will most likely realize this through a new address format known as “bech32,” which also has some technical advantages that limit risks and mistakes (for example, those caused by typos).
“To spend coins from the P2SH format currently used for SegWit, users need to reveal a redeem script in the transaction,” Bitcoin Core and Blockstream developer Dr. Pieter Wuille, who also co-designed the bech32 address format, told Bitcoin Magazine.
“With native SegWit outputs this is no longer necessary, which means transactions take up less data. Recipients of SegWit transactions will be able to spend these coins at a lower cost.”
Perhaps even more importantly, several major Bitcoin services — like Coinbase — plan to upgrade to SegWit in 2018 as well. Since such services account for a large chunk of all transactions on the Bitcoin network, this could significantly decrease network congestion, thereby decreasing average transaction fees and confirmation times, even for those who do not use these services.The Lightning Network Rolling Out on Bitcoin’s Mainnet
While further SegWit adoption should provide immediate relief of fee pressure and confirmation times, truly meaningful long-term scalability will likely be achieved with second-layer solutions built on top of Bitcoin’s blockchain.
One of the most highly anticipated solutions in this regard — especially for lower value transactions — is the lightning network. This overlay network, first proposed by Joseph Poon and Tadge Dryja in 2015, promises to enable near-free transactions and instant confirmations, all while leveraging Bitcoin’s security.
The solution has been under active development for about two years now, with major efforts by ACINQ, Blockstream and Lightning Labs. Progress on the scaling layer has been significant all throughout 2017, with early software releases of different but compatible software implementations, useable wallets interfaces and test transactions happening both on Bitcoin’s testnet and even on Bitcoin’s mainnet on a regular basis now.
“I'd say we have solved the main technical problems and have a relatively good idea on how to improve on the current system,” Christian Decker, lightning developer at Blockstream, told Bitcoin Magazine. “One last hurdle that's worth mentioning is the network topology: We'd like to steer the network formation to be as decentralized as possible.”
Given the current state of development, adoption of the lightning network should only increase throughout 2018 — not just among developers, but increasingly among end users as well.
“Integration and testing will be the next major step forward,” Lightning Labs CEO Elizabeth Stark agreed, noting: “Some exchanges and wallets are already working on it.”Increased Privacy Through TumbleBit and ZeroLink
While it is sometimes misrepresented as such, Bitcoin is not really private right now. All transactions are included in the public blockchain for anyone to see, and transaction data analysis can reveal a lot about who owns what, who transacts with whom and more. While there are solutions available to increase privacy right now — like straightforward bitcoin mixers — these usually have significant drawbacks: They often require trusted parties or have privacy leaks.
This situation could be improved significantly in 2018. Two of the most promising projects in this domain — TumbleBit and ZeroLink — are both getting close to mainnet deployment.
TumbleBit was first proposed in 2016 by a group of researchers led by Ethan Heilman. It is essentially a coin-mixing protocol ......................More Sidechains, More Adoption
Sidechains are alternative blockchains but with coins pegged one-to-one to specific bitcoins. This allows users to effectively “move” bitcoins to chains that operate under entirely different rules and means that Bitcoin and all its sidechains only use the “original” 21 million coins embedded in the Bitcoin protocol. A sidechain could then, for example, allow for faster confirmations, or more privacy, or extended smart contract capabilities, or just about anything else that altcoins are used for today.
A Schnorr Signatures Proposal
[U]Schnorr signatures, named after its inventor Claus-Peter Schnorr, are considered by many cryptographers to be the best type cryptographic signatures in the field[/U]. They offer a strong level of correctness, do not suffer from malleability, are relatively fast to verify and enable useful features, thanks to their mathematical properties. Now, with the activation of Segregated Witness, it could be relatively easy to implement Schnorr signatures on the Bitcoin protocol.
Perhaps the biggest advantage of the Schnorr signature algorithm is that multiple signatures can be aggregated into a single signature. In the context of Bitcoin, this means that one signature can prove ownership of multiple Bitcoin addresses (really, “inputs”). Since many transactions send coins from multiple inputs, having to include only one signature per transaction should significantly benefit Bitcoin’s scalability. Analysis based on historical transactions suggest it would save an average of 25 percent per transaction, which would increase Bitcoin’s maximum transaction capacity by about 33 percent.
Further on, Schnorr signatures could enable even more.......... -
Uz to mogli su još spomenut i Sphinkx i Bulletproof protocol
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Zabava tek počinje. To je kao ono u avionu....sad se rolamo po pomočnoj pisti i skrečemo prema onoj glavnoj.
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Jameson Lopp
Verified account @lopp
1h1 hour agoFrom a recent conversation I had with someone who is building it: "Nearly instant atomic swaps via Lightning Network are coming sooner than everyone thinks. Definitely not a year away, but mere months."
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Budući sam se potrudio napisati ozbiljan post, a stvaio sam ga na forum.hr, evo ga i ovdje:
Žalosna je količina predrasuda i neinformiranosti, kako ulagača, običnih ljudi ali pogotovo naših medija.
Ispod radara prolaze vijesti koje govore o enormnoj količini uloženog znanja, vremena i novca u kripto.
Dakle tolika količina kompanija, novih ali i starih koja je već unutra ili se tek srpema ući, a mediji o tome šute. Govorim o ovim našim lokalnim bezveznjacima.
Ajmo redom. Bil Gates i Microsoft su još od 2014. dozvolili kupnju dijela svog asortimana Bitcoinom. Gates je ulagač u Factom i još neke projekte.
Jack Dorsey ( Twitter ) je u crypto ušao preko tvrtke Square.
Zuckerberg ( kasni ) ali se sprema ove godine proučiti kako da preko kripta decentralizira Facebook.
Peter Thiel je već odavno ušao, ima nekoliko projekata. I to ozbiljnih.
Visa je već unutra na način da ima pobočne firme koje izdaju debitne BTC kartice. To je mnogima tek posalo jasno kad je banirala firmu WaveCrest koja drži debitne kartice za EU.
AMD je unutra zbog prodaje kartica i procesora.
Nasdaq se sprema izdati futurese na Bitcoin. Kasni za CME ( Chicago Merkantile Exchange ) i CBOE.
Goldman Sachs se sprema u ljeto otvoriti trading desk za Bitcoin i ostale kripto valute.
Ekipa poput Sorosa, Cubana, Larry Summersa je već odavno unutra.
U ovoj godini bi mogli dobiti i prve ETFove na Bitcoin. Kad se to dogodi cijena će se udvostručiti u vrlo kratkom vremenu.
U posao sa Bitcoinom i kriptom ulaze i ljudi koji su bili žestoki skeptici:
https://news.bitcoin.com/finance-gur...0NotificationsNeki dan je promet kripto valutama bio preko 61 mrld usd..........itd itd
I na kraju zapamtite, najveći scam nisu kripto valute ( iako ih ima ) nego debt-based fiat valute.
Ali nema veze, vi slušajte skeptike i njihove napade a da nemaju pojma što je to kripto.. Vaš interes brane Markotros, 7natonarmy, Lovrinović i index.hr.........oni su skroz na vašoj strani........
Good luck
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7nation army hahahahahahha kakav lik, presta me davnih dana nervirat, ali dopizdilo se i smijat degeneriku...
Neka vas sta vise vamo -
Ja sam ga blokirao. Imam taj osobni nagon da podjelim ono sto znam sa svima, pa me onda takvi likovi pre lagano navuku u troll war.
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Ja ih imam blokiranih preko deset. A 7nationarmyija sam blokirao kad je po treći put krenuo pitati što se može kupiti Bitcoinom, iako ga kartičari koriste an masse.
Evo neki dan se pokazalo koliko ljudi koriste BTC kartice kad je VISA blokirala WaveCrest.
Čovjek je priglupa budaletina...........
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Još malo o LNu
Lightning Network enables Unicast Transactions in Bitcoin. Lightning is Bitcoin’s TCP/IP stack.
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Once you've got money on the lightning network, it gets super powers!
https://pbs.twimg.com/media/DTNXKLMW0AAepOA.jpg -
Može dečki molim vas malo pojašnjenje tog LN-a i kada će proraditi s btcom?
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Na žalost, baš kao što se ni Bitcoin ne može objasniti nekako baš kratko ili jednostavno ne može se objasniti ni LN, al ajd da probam.
Ja i ti radimo neki biznis i plaćamo se međusobno u BTC-u. Sada, svaki puta kad netko nekome nešto želi platiti, mora poslati transakciju u BTC mrežu na ovjeru od strane minera. Ja kad šaljem tebi, jedna ovjera i jedan zapis u BTC blockchain, ti šalješ meni, druga ovjera i drugi zapis, ja opet tebi, treća ovjera i treći zapis itd.
Kako svaka transakcija tj. zapis o transakciji zauzima mjesto u bloku (kao što file-ovi zauzimaju mjesto na tvon HDD-u), tako je moguće da se blok napuni do svog maximuma (koji je određen od strane mreže te iznosi 1MB). Kad dođe do toga, korisnici se moraju nadmetati međusobno na način da povisuju fee, kako bi ih mineri što prije uvrstili u blok.I tu dolazi LN. LN je mreža "iznad" Bitcoin mreže sa kojom je povezana samo u dva navrata. Prvi puta kada korisnik otvara LN kanal, i drugi puta kada zatvara LN kanal.
Da se vratim gore na primjer. Ja i ti krečemo u međusobni business. Ja otvorimm LN kanal prema tebi (ili ti prema meni, tako je svejedno), plati se miner fee (mineri ga moraju potvrditi) te nakon toga ja i ti možemo međusobno izmjenjivati BTC koliko god često i koju god količinu želimo bez da ih šaljemo minerima. Možemo napraviti milijon transakcija a da ne platimo jedan jedini mining fee. Kad iz nekog razloga završimo poslovanje (nakon par dana, mjeseci ili godina), ili kad netko od nas iz nekog samo njemu znanog razloga želi zatvoriti kanal, on šalje pokreče proces zatvaranja, zbroje se stanja na samom kraju, te se ta stanja pošalju minerima na obradu.
Ilitiga, ja i ti možemo poslovati godinama a da ne platimo jedan jedini mining fee.
E sad, LN ne radi samo od jedne do druge osobe. On ima mogućnost pronalaženja "rute" unutar mreže, pa ako osoba A i osoba B imaju kanal, a osoba C ima kanal sa osobom B, onda osoba C može poslati BTC osobi A preko osobe B ( A <-> B <-> C ). I tako, što više ljudi bude imalo otvorene kanale, tako će mreža lakše pronalaziti kanale preko kojih može spojiti A i C i na taj način omogućiti da korisnik ne mora otvarati LN kanal svaki puta kad želi platiti nešto nekome s kim do sada nije imao posla, već mreža pronađe putanju preko tko zna koliko osoba da izvrši transakciju.
Na taj način, pošto mineri neće potvrđivati sve transakcije, već samo otvaranje i zatvaranje LN kanala, dolazimo do situacije da blokovi budu prazni (ili barem ni približno puni kao sada) te da i ti osnovni transaction fee-ovi budu daleko daleko niži (ja se nadam na razini 2013. ili rane 2014.
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Hvala puno na objašnjenju. Sve jasno. Kada bi to moglo proraditi na btc-u? :D
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Evo ovdje čovjek spominje rok pa slušaj
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Jedna od "negativnijih" stvari kod Bitcoina je visok fee.
Evo stranice na kojoj se vidi koliko se ustvari može taj fee smanjiti kada bi se apliciralo sve što se treba po tom pitanju.
SegWit, Multisig, Batching...
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Evo i mog friškog iskustva vezanog uz konkretnu kupovinu stvari Bitcoinom.
Ovo je dokaz o onome što ja tu trubim već dugo vremena. Bitcoin nije spor. Bitcoin transakcije su instantne (ograničene propagacijom kroz nodove, što je pak ograničeno brzinom komuniciranja unutar p2p mreže). Da bi Bitcoin transakcija bila "odrađena" ona ne mora biti prihvačena u blok. Ubacivanje transakcije u blok je samo dodatno osiguranje.
Upravo sam sada kupio još jednu grafičku karticu, tu u dučanu u ZG, plativši Bitcoinom.
Dućan koristi BitPay kao BTC payment providera. Stisnuo sam na plati, odabrao Bitcoin, dobio link (ustvari Bitcoin invoice) koji sam paste-ao u svoj wallet (Electrum sa coinima na SegWit adresi) koji je taj link automatski obradio i unio adresu i količinu koju moram poslati, podesio sam fee skroz u desno (najjeftinije) i stisnuo send.
Par sekundi nakon toga, na samoj stranici BitPay javlja da je Bitcoin poslan ali nepotvrđen (jer se u međuvremenu nije kreirao niti jedan blok).
Isto tako dobivam i obavjest na mail:
Iako je Bitcoin transakcija još uvjek 0 confirmation, nedugo nakon toga stiže i potvrda samog web shop-a:
Gdje mi kažu sljedeće:
To je to....Bitcoin je poslan i oni to prihvaćaju kao gotovu stvar iako ima 0 confirmation-a.
Prvi Bitcoin blok je izmajnan skoro pola sata nakon toga (2018-01-29 10:28:30) i moja, najjeftinija transakcija je odmah primljena u taj blok.
Ovo je sama transakcija: https://blockchain.info/tx/9d018ed3f1acd488418515be817f1694bdd46ef0486753e92fece127b20f5fb5
Da sam se sjetio i išao upisati ručni fee (zaboravio sam enejblati tu opciju u samom Electrumu), mogao sam proći DALEKO jeftinije (cca 0.5$ fee bi bio).
Tako da, kad vam netko kaže: "Bitcoin je spor" samo se nasmijte i klimnite glavom.
Jedino još ostaje je "Bitcoin je skup" mantra. Da, 0.5$ za slanje 900$ je (po meni) skupo. I baš zato se nadam da će adaptacija SegWit-a porasti što prije, kako bi se fee-ovi dodatno smanjili te kako bi mogli BTC napokon prebacivati bez razmišljanja o samom fee-u.
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https://blockchain.info/tx/31f7a3cc4c964f4970b408da108ebb4e4051adb7ab2a826889a976c2e5ed8cf0
Fees 0.00000754 BTC = 0.06$
Instantan prijenos i mali fee, a SegWit je tek na 14-15%.
LN fee-ovi mogu ići samo i jedino ispod ovog.Sa ovim fee-om, što mislite, dali će biti problem otvoriti 3-5 kanala na jednom nodu i osigurati decentraliziranost kakvu god želiš?
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(https://www.youtube.com/watch?v=vX1BjDHhuVk)
Odavno se nisam ovako nasmijao. Ima zanimljivih stvari za čuti, Richard je lud ka kupus.
