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1  Bitcoin / Project Development / Protecting Gold with Blockchain? on: April 26, 2018, 05:51:19 AM
First, I'd like you guys to take a look at this:

That project made me wonder, why not use the same concept to protect gold in its various forms (bars, jewelry, etc.), of course, this should be adopted by governments to succeed.

The core idea is that every piece of gold would carry a digital signature, much like the certificate you get when buying gold. Those signatures are tracked as crytpo assets on the blockchain along with other meta info that describe the item, so when you want to buy gold you know exactly what you're buying.
Also, if your gold is stolen, they can't sell it since they don't have the crypto keys to transfer the owner of this item, with the help of government regulations it'll be much easier to find stolen gold.

What do you guys think? other than that I'll need to write proper document explaining the idea along with steps of implementation and technical documents, how would I start with it?
I believe in the potential of this idea, it's just a problem of how to get it started, since it won't work unless governments support it :/
2  Economy / Marketplace / Low activity long term BTC investing? on: April 12, 2018, 08:44:55 AM
I have some BTC asleep in my wallet doing nothing, therefore I want to put them in work to increase their value.
I've already looked into crypto trading but that requires spending much time reading about the projects to find good ones with potential and staying up to date with it, however my main concern is that I don't have much time to follow up on them :-/
Also thought about running a Loan service, however it takes as much time in validating the loans and keeping up with them, not to mention with my current trust it's highly unlikely to find a valid loan since they'd go for more trusted users.
My final thought was lending my funds to an existing loan service for a small return, which sounded good idea first... but I couldn't find a loan service that seems to be short on funds  Undecided

Anyone got other ideas that will  get me some revenue without having to spend much time following up with it? something set & forget for couple months (maybe check once every month or two)?
3  Other / Meta / Spoiler tags? on: March 17, 2018, 07:34:54 PM
I've been trying to find spoiler tags, you know those things you click to expand/shrink part of the post...

Don't they exist around in this forum?? if not then what's the possibility of them being added??
4  Economy / Economics / Which type of transactions causes more congestion to network? on: March 12, 2018, 04:43:29 AM
While it's nearly impossible to get accurate numbers, I'd like to hear what you guys think. Does international transactions (between 2 address that their owners are in different countries) cause more congestion to network? or local transactions (between 2 address that their owners live in same country).

==============EDIT (scroll down a bit to see where I said that but no one read it.=============
For all people above saying that geographic location doesn't matter, I know that.
Probably I've written my question in an ambiguous way, what I'm asking is, do you think the number of transactions moving funds between wallets whose owners are in different countries is more than the number of transactions moving funds between wallets whose owners are in same country.
Why that matter? if the local transactions count for more, then maybe there's a solution to reduce the number of transactions by creating a coin that runs on 2 separate chains (or more) somehow. one chain for local tx, and other for international tx, I'm still thinking of the way this would be implemented, but in theory this can reduce network congestion by creating a 'local chainS' and 'international chain'.
5  Economy / Marketplace / List of stuff you can use bitcoin for. on: March 10, 2018, 12:04:50 PM
I'm looking to create a list of all companies, sellers, or whoever accepts bitcoin as payment option for a product/service.
This list could be used as a reference for all members and new comers so they quickly find places that accept bitcoin (maybe extend to other crypto later).

I'll try to maintain the list as much as possible, all contributions to the list are welcome.
If you want to add a company, kindly use the following format to make it easier for me when adding your suggestions:
Category: <category of website>
[td][center][size=12pt][url=<URL HERE>][color=orange]<NAME HERE>>[/color][/url][/size][/center][/td][td][size=12pt][color=black]▮[/color][/size][/td]
[td][center][size=12pt][color=orange]<OTHER INFO HERE>[/color][/size][/center][/td][td][size=12pt][color=black]▮[/color][/size][/td]
Note: I'm not affiliated with any of those websites, and have nothing to do with any of them.


do we really need to tell you what this is??
Top-up your mobile phone with bitcoin or other cryptocurrency
Online shop - buy from Amazon, Dell, Ebay, and Lenovo using BTC
Hosting service - VPS - dedicated - web hosting - SSL certificates ...
-Buy electronic/mobile phones/health&beauty and a lot more (EU based)
-Buy Gold/Silver/Platinum -Never try,but I think they have good reputation.
Hand made collection shop.
list of store that accept bitcoin in Philippines
Recharge prepaid phones with Bitcoin
USA based Luxury watches store.
Online shop - Buy watches and jewelry using BTC.
Gigs for bitcoins.
bitcoin payment service provider
Buy Real Estate with cryptocurrency - Sell your property for Bitcoin
Travel agency - Book your flight/hotel using bitcoin.
Top up your prepaid phone, over 140 countries supported.
Hosting service.
VOIP service that accepts BTC, pay only for the calls you make! There are no recurring membership fees
-Payment Gateway -Use them many time for different service.
Coinvet is the groundbreaking new jobs and gigs marketplace where the crowd helps you find the best professionals for your exact needs.
technical support to recover, restore, search, and produce electronic information (is that still operating??)
offer a huge variety of high-end and luxury goods available for purchase in only cryptocurrency, no fiat.
Freelancing platform - Hire a freelancer or work as one, for bitcoins.
Shop online for your jewelry and pay with Bitcoin.
Travel agency - provides Hotels, Cheap Flights, Car Rentals & Vacations
USA based fire protection company, fire extinguishers and fire suppression systems.
Online shop - Jewelry, Watches, and accessories.
Buy, Send, & Redeem Gift Cards
dating website.
Computer service provider, website is very bad, probably they're out of business.
authorized dealership in Orange County providing Super Sports Cars to Southern California
you can charge your account with BTC
Finance service, all your finance in single place. "When youíre on top of your money, life is good. We help you effortlessly manage your finances in one place."
Shop online for your jewelry, and pay with Bitcoin.
Shop for jewelry, or CREATE your own design, and pay with bitcoin.
Domain Name Registrar
Online shop
Decentralized marketplace - Online eCommerce platform that unites buyers/sellers by virtue of the P2P/peer-to-peer network
Online shop - designer brands and home goods
Send money to your friends and family online or top up while travelling. Almost 600 providers from 137 countries. Pay with Bitcoin, Dash or Stellar at best rates possible.
Order Pizza online and pay with BTC
VPN Service: Access US Netflix Instantly for just $2.87/m Making Security and Freedom Accessible for Anyone, Anywhere!
Online shop - buy from amazon using BTC and get a discount!
Freelancer - A web developer with a passion for Bitcoin, Economics and freedom.
USA based jewlery - Personally I like their goods (looks only, haven' bought any yet)
a map of USA restaurants that accept Bitcoin. (can anyone verify any of them?)
Pins, Patches, and other accessories for bitcoin.
Charity accepting BTC payment. P.S: probably you'll need to contact them first to donate in bitcoin.
Jewelry and Accessories for Bitcoin.
software solutions provider, probably out of business since their website has copyright logo for 2015
-Buy Hosting&Domain -I use them for years,great service.
North American member of The Tanzanite Authority, a group of like-minded collectors, investors, and who are dedicated to informing and supplying the very finest top quality AAA certified Tanzanite. (first time to hear of tanzanite to be honest, but they look cool)
Freelancing platform - Hire a freelancer or work as one, for bitcoins.
 Authorized McLaren Dealer
seems to be like someone offering IT services, website is way too minimal. no idea why I listed it nor what link got me to there at first place.
Hunger no more, get your KFC for BTC.
Eat healthy, with bitcoins too.
Cheap Airline Tickets, Airfares & Discount Air Tickets
Largest Czech online retailer accepting BTC.
Snap up a pint in Britain's first Bitcoin pub.

6  Alternate cryptocurrencies / Altcoin Discussion / [Neo] Possible to spend partial value of contract?? on: March 03, 2018, 05:08:22 AM
I'm learning to use Neo smart contract for a project at university where we will be running a small private test net.
One of the things that we discovered is the need to spend only part of the contract value when given conditions are met.
Does Neo support that directly? if not, what are possible ways to achieve same thing? like for example the smart contract will create another smart contract with part of its value?
7  Other / Off-topic / Online games you play? on: February 10, 2018, 02:29:40 PM
I'm wondering what online games do you guys play?
Personally I've played PWI before, and DOTA2. Currently getting my self into unreal tournament but I really suck at FPS games Undecided

Maybe we can make a part in some game to have fun around?
8  Other / Meta / Add a poll to an existing thread? on: February 09, 2018, 08:29:34 AM
I have this thread:  that I've found that I'd like to add a poll to it, however I can't seem to find the way to do it.
Is it possible to add a poll? or I'll have to start a new topic with a poll?? because I really don't want to have 2 threads going for the same thing.
9  Economy / Marketplace / Constant bitcoin exchange? on: February 08, 2018, 05:30:32 PM
I'm about to use crypto exchange for my new business, the work load contains lots of buy orders (USD to other crypto) that should be automated using API, ideally I'd like it to allow withdrawing to different addresses without having to validate every and each one of them.

I've already looked into Kraken, Gemini, and Coinmama, and have few concerns (still didn't look into their API tho), Gemini seems good but I'll end up with the 0.002BTC withdrawal fees group, so I'd like to know is that 0.002 per transaction? or per month? and do they support withdrawing directly to different address?

Also, do you guys have better suggestions?
10  Economy / Economics / When will see prices independent of USD? on: February 07, 2018, 02:42:06 PM
Pre note: all the following at my personal thoughts, I'm no expert in what so ever, so don't assume that I'm giving directions to people, instead consider it as me asking for directions.

The title is a bit unclear, and maybe misleading, I'm not the best one to come with titles for sure.

So, the whole thing is about this: while we're all here crypto enthusiasts, and yarning for the future of crypto, I still see some stuff that I believe are holding us back to the age of USD. We worry about the price conversion, and most of the services/buy/sell while they accept the payment of crypto, they still use USD as the backing value. This situation is something like trading your currency (CAD) for JPY (Japanese Yen) to buy something valued based on USD, lots of losses on the way in fees and such, also the price is volatile.
If we keep things like that, I doubt crypto will ever be the economy of future, all it will be is just another currency in the market. I understand that it takes time to reach that phase, but shouldn't we start taking the steps already? bitcoin is nearly 10 years old now, if we can't start to price things based on it accordingly, then when will we start??
Far as I think, in order to make a shift like that, we need lots of people who have variety of products enough to let them create something like a mini community so they won't be affected by the USD. But, we don't really need to make it fully independent community, at least not in one single go, maybe we should start isolating few services that are offered for a constant BTC rate, and start shifting the economy step by step?
11  Economy / Marketplace / Is there interest for bitcoin gift cards? on: February 03, 2018, 07:34:50 PM
If I make a start up company for bitcoin gift cards, do you guys think there is enough interest for it?

I have a friend working on a nice design for the card, probably will include multiple designs to fit all customer's occasions (x-mas, birthday, daily gift, promo event, etc.), and I'm working on the technical part to make it require absolutely no trust between us (the company) and the buyers. It should be a nice way to give a gift to your family and friend, regardless if they're still getting into crypto, or already are working with it.

I do have some nice use cases that I can use for marketing later, but I'm a bit concerned about the start point.

Therefore, I'm asking you all guys, if there is such a thing (for BTC or whatever other crypto currency), would you guys be interested in buying/using it? and why?

Thanks in advance for you all.

Here are some questions that we'd like you to answer in order to help us better shape the service:
1- Do you prefer a preset amount for each card? or would you like to charge it up to your liking?
2- Would you prefer a complete online order (even if it costs you slight privacy? specially when paying non-crypto like PP) or would you prefer to complete the deal at a shop with cash in hand and no personal info required?
3- If you answered 2 with completing at a shop, would you consider being a local distributor? why? and what would you expect in return?
4- Would you plan on buying larger quantities? continuous supply? or you just buy couple cards on special occasions and forget the service for the rest of the year? as this can affect the way to get local distributor.
5- Would you trust me/us/company to have the private keys in order to make things a bit easier at your end? or would you prefer spending extra couple minutes at your end to complete the deal without me/us/company having any way of touching the money in the card? note that this choice will affect the ability to recover the funds in case the card is lost, at the expense of storing some of your personal info, so this isn't for everyone.
6- Do you have expected shape/size/dimensions for the card? it might end up a bit larger than normal cards, but will make sure the space is well used.
7- What special occasions would you like to have the cards for? I'm not that cheerful person who remembers all occasions, the ones I have in mind right now are birthdays, x-mas and new year, not sure if you'd give bitcoin in valentine (there are more suitable coins for that Wink Wink)
12  Alternate cryptocurrencies / Altcoin Discussion / Altcoins worth small scale mining? on: February 01, 2018, 08:58:43 AM
Is there any alt coin that's worth mining on small scale?
not looking for huge profit, just taking it for learning.
13  Alternate cryptocurrencies / Altcoin Discussion / Ethereum light wallet on: January 22, 2018, 04:00:24 PM
Anyone knows how to setup a light Etheruem wallet on Windows 10 ? Ideally I don't want it to download more than 100MB since I don't have much space to spare.
Also, it's possible to use WSL/Ubuntu on Windows if it means less occupied space.
Finally, I need it to support all those Tokens without the need to download more clients/updates/etc.
14  Bitcoin / Bitcoin Discussion / Is this a possible to attack blockchain? on: January 20, 2018, 03:58:46 PM
Now, it's kind of a common knowledge what the 50%+1 attack is, and how it allows attacker to rewrite transaction history.
My idea is, does it really matter to me (as an attacker) to launch the attack and only rewrite the last block (or few blocks)? why not redo the whole block chain and screw it up for everyone?

Lets say I download the first year or two of BTC blockchain, before the time of GPU mining, so the difficulty would be pretty low and can be easily overwhelmed with couple GPU cards. Then, I use a custom GPU miner that will find a block at exactly 10 minutes, because the difficulty is very low, running in an isolated fully controlled environment, and running a custom miner, it shouldn't be hard to generate a block every other minute.

I know there's difficulty change every 2 weeks worth of blocks, but since the blocks are generated with malicious time stamps of 10 minutes delay and I'm running in a controlled environment, it's very easy to trick the system and hold the difficulty at constant level that allows me to keep mining blocks and rewrite the whole history since 2010 for example.

Now, up to this point the whole thing is being run in an isolated controlled environment 'malicious net', so the 'main net' doesn't know about it, what I do next is to mine up to a couple weeks in the future and stop 1 block after a re-target block, then distribute the 'malicious net' on multiple servers to increase upload speed and hit multiple nodes at same time (still not exposed to 'main net') and wait till the re-target happens.

Once it happens, I open my malicious servers to the 'main net', and because I have a longer chain, clients would start to use it, and because it has low difficulty, it'll find more blocks faster and poison more clients with my 'malicious net'.
I've picked to stop at a re-target block because it usually takes a bit longer for miners to find a block after it, giving me more time to distribute my 'malicious net'

This type of attack wouldn't be carried overnight, it will take couple months of preparation for sure.
Is such attack possible in theory? if not, then why? if so, what effects would it bring to BTC? and how would we prevent it??
I've originally wanted to test this idea in a local setup before bringing it to public, but I don't have enough technical knowledge to implement it.
15  Alternate cryptocurrencies / Mining (Altcoins) / Setup local mining pool for lower network bandwidth? on: January 19, 2018, 04:08:24 PM
If I have multiple devices on local network (say around 60) but low internet speed, would it be better to setup some kind of local pool over LAN so I end up with 1 connection to remote pool and 60 LAN connections?
16  Alternate cryptocurrencies / Altcoin Discussion / Mining altcoins on normal device to start learning?0 on: January 11, 2018, 08:07:07 PM
Do you guys know if there are altcoins that are worth mining on normal devices? doesn't have to generate that much profit, just generate something to start messing around and get the grip of it before actually investing in building a GPU rig.
My main goal here is to get used to the process of mining and how to estimate stuff, also want to learn using trading platforms, switch mining between coins, and how to use light wallets for them.

Thanks in advance.
17  Alternate cryptocurrencies / Mining (Altcoins) / Calculating profit for mining with multi-coins pools??? on: December 18, 2017, 07:24:58 AM
I'm trying to figure out the math to get estimations on which is more profitable, buying GPU and mine alt-coins with multi coin pools? or buying Antminer S9 and mining BTC.
I've did some math for the BTC part, but I'm struggling on finding a formula to calculate GPU mining earnings.
Anyone knows how to get rough estimations for it??
18  Economy / Marketplace / Crypto currency VISA / MasterCard ? on: November 28, 2017, 05:56:12 PM
I'm not really familiar with how VISA/MasterCard work, but I'd like to know if there's a way to use them and pay in bitcoin or any other crypto currency. My main interest is paying for exams/application fees for my post graduate studies, so small limit on account transactions aren't a big problem.
19  Bitcoin / Development & Technical Discussion / Bitcoin Script language grammar? on: November 18, 2017, 04:08:43 PM
This wiki page contain pretty much helpful info:  since it has all the 'words' accepted in the scripting language.
However, I was wondering if there's something like a grammar to this language? something like the grammar used to build parse tree for other languages.

Reason I'm looking for this is that I have a project at university for the compilers course, so I was looking into building a parse tree for the bitcoin scripts.

Thanks in advance.
20  Alternate cryptocurrencies / Altcoin Discussion / [Monero] How are the initial transactions secured? on: September 25, 2017, 04:55:41 AM
Far as my understanding of Monero goes, each transaction is secured by ring signature, that is signing the tx with public keys from other transactions... But, I can't see how did the very first txs got ring signature when there was no other tx to mix it with.
Anyone could elaborate this point for me??
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