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blockchain ledger for verifying virtual wallet transactions

$250-750 USD

Lezárt
Kiadva ekkor: több mint 5 évvel ezelőtt

$250-750 USD

Teljesítéskor fizetve
i am building a virtual mobile wallet where users create an account n deposit their money and can send ,recieve and transacf using this virtual money. I now need for my security and aunthentication a blockchain ledger or system that tracks transactions, updates all user ledgers of the transaction history (like normal blockchain tech), and uses end to end encryption technology to enable offline transactions. i need this backend to be integrated into the wallet ,the wallet is being built in java android
Projektazonosító: 17495784

A projektről

12 ajánlat
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Aktiválva: 6 évvel ezelőtt

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12 szabadúszó adott átlagosan $1 096 USD összegű árajánlatot erre a munkára
Felhasználó avatár
Hi there, I am currently developing such kind of payment gateway using blcokchain, etherium, litecoin etc, Where all the transactions done by the users to the merchants and their transactions details are stores in the database, can you please come on the chat to discuss more? Thanks
$555 USD 10 napon belül
4,8 (4 értékelés)
3,5
3,5
Felhasználó avatár
Dear Employer, We can help you building the Android app for the wallet. Earlier we have done wallet integration for the PayUMoney, PayTM & various others. We are having a good hold over security industry standards, Authentication algorithms, HMAC & others.
$444 USD 15 napon belül
5,0 (3 értékelés)
3,4
3,4
Felhasználó avatár
Hello, sir. It's very nice to meet you. I am a super blockchain expert, and I have very rich experience on this field. I am sure that I can deliver the final product on time and on budget. Please contact me for further discussion. Thanks in advance.
$555 USD 10 napon belül
0,0 (0 értékelés)
0,0
0,0
Felhasználó avatár
Hello , I am a blockchain developer and an architect rich experience with Wallets , blockchain (both public and private), Ethereum, Bitcoin, smart contracts, ICO, tokens. I have successfully completed many projects for my customers from corporate, charity and public sectors all over the world. I have been providing them with full cycle web solutions, cryptocurrency exchange systems, cryptocurrency trading bots and many other custom Blockchain solutions. For more than 3 years I have been working on implementing Blockchain and building DAPP solutions from the ground up. My expertise includes building new cryptocurrencies and performing hardforks of the existing PoS and PoW solutions, modifying algorithms and coin supply schemes, customization of wallets etc. I also built several FinTech solutions utilizing blockchain technologies, among them there are money transfer application on top of Corda framework and B2B money lending service built on Hyperledger Fabric. I would appreciate the opportunity to meet with you further talk about my previous experience. Best Regards...
$250 USD 5 napon belül
0,0 (0 értékelés)
0,0
0,0
Felhasználó avatár
Transferring cryptocurrencies with Ledger products A cryptocurrency is not a physical asset. It always remains on its blockchain. This is similar to dollars or euros exchanged through credit card payments or bank transfers which also stay on the Internet until they are withdrawn at an ATM.   Thus, when you transfer a cryptocurrency from a wallet or an exchange to your Ledger Wallet, it does not mean that you transfer this cryptocurrency onto your Ledger device. Your Ledger device does not store cryptocurrencies. You transfer a cryptocurrency from one wallet to another wallet on a cryptocurrencies dedicated blockchain. You do not transfer a cryptocurrency from an online wallet, located on a blockchain, to a Ledger device, out of this blockchain.   A cryptocurrency is not a physical asset, it remains on the blockchain and can not be transferred onto a physical product like a Ledger device.   The Ledger device is a means to accessing your very own cryptocurrencies on each blockchain. As an analogy, you could consider that accessing your Ledger Wallet in any cryptocurrency supported by Ledger is the same as your right to claim that those cryptocurrencies displayed on your balance are yours and not someone else’s cryptocurrencies on the same blockchain. No one is able to access your cryptocurrencies on this blockchain without accessing your Ledger Wallet.   To protect your Ledger Wallet and guarantee secure access to your cryptocurrencies, each Ledger product generates a 24 word recovery phrase (also called “private key”). This is your private identification on the blockchain. Your funds can not be stolen unless the 24 word recovery phrase has been shared online or offline and is visible to someone aware of its usage.   The Ledger Wallet (Ledger product + Ledger software wallet) guarantees secure access to your cryptocurrencies on each dedicated blockchain. Budget - $700
$700 USD 30 napon belül
0,0 (0 értékelés)
0,0
0,0

Az ügyfélről

BOTSWANA zászlója
harare, Botswana
5,0
1
Fizetési mód hitelesítve
Tagság kezdete: jan. 7, 2018

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