Buy, Send, and Redeem Gift Cards Gyft makes it easy for you to give the perfect gift card and conveniently manage them from any device!Buy Bitcoin next to you in 150.000+ Local stores around the world with & .Fast and easy The financial revolution starts locally Neosurf, Cashlib and Flexepin vouchers are available in thousands of locations throughout the world.To buy your next Bitcoins, just take a look at the map and select wherever you are, or wherever you’d like to be.Flexible It’s as simple as buying a magazine Pay with cash or credit card, for amounts from €25-250.You’ll receive a receipt with a code - keep it safe, because it’s all ready to be redeemed for Bitcoin !Full control Your voucher holds its value Your voucher always has the same value until you redeem it for Bitcoins.Find a store, create your account, and turn your voucher into Bitcoins whenever you want - simple as that !Privacy No credit card or bank account needed With Neosurf, Cashlib or Flexepin you never need to expose your financial details online.

Protect yourself from online fraud - it’s a wild world out there !Buy iTunes Codes with bitcoin Use your bitcoins to purchase iTunes codes effortlessly on RewardsPay.Simply visit our bitcoin iTunes Offers page and choose an iTunes code denomination.You will then have the ability to select bitcoin as a payment option to purchase your iTunes code.Redeem your iTunes gift code purchased with bitcoin Now that you have used your bitcoin wallet to purchase your iTunes gift code it's time to redeem your iTunes code.For detailed instruction click on the product below Select your product for instructions » You can pay with your bitcoins using any wallet e.g.You can tap into the liquidity of your bitcoins to purchase music, movies, apps and anything else available at iTunes!This BIP defines a technique for creating a payment code which can be publicly advertised and associated with a real-life identity without creating the loss of security or privacy inherent to P2PKH address reuse.

This BIP is a particular application of BIP43 and is intended to supplement HD wallets which implement BIP44.litecoin pool mining listThe key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119.litecoin fxPayment codes add identity information to transactions which is useful in a merchant-customer interaction while protecting the privacy of users.bitcoin armory usbPayment codes provide the privacy benefits of Darkwallet-style Stealth Addresses to SPV clients without requiring the assistance of a trusted full node and while greatly reducing reliance on blockchain storage.bitcoin mining samsung galaxy

We define the following 3 levels in BIP32 path: m / purpose' / coin_type' / identity' The child keys derived from an identity are used in different ways: m / purpose' / coin_type' / identity' / 0 The 0th (non-hardened) child is the notification key.ethereum pound pricem / purpose' / coin_type' / identity' / 0 through 2147483647 These (non-hardened) keypairs are used for ECDH to generate deposit addresses.gudagnare bitcoinm / purpose' / coin_type' / identity' / 0' through 2147483647' These (hardened) keypairs are ephemeral payment codes.Apostrophe in the path indicates that BIP32 hardened derivation is used.Each level has a special meaning, described in the chapters below.Purpose is a constant set to 47' (or 0x8000002F) following the BIP43 recommendation.It indicates that the subtree of this node is used according to this specification.

The coin type field is identical to the same field in BIP44 Hardened derivation is used at this level.The identity derivation level produces an extended public key and its associated extended private key.When the extended public key at this level is combined with the metadata specified in the Representation section below, the resulting entity is called a "payment code."This derivation level is equivalent to the Account level in BIP-44.Wallets SHOULD treat payment codes as intrinsically part of the BIP-44 account at the same index and create payment codes and accounts as pairs.For example, the payment code created represented by (m / 47' / 0' / 0') is part of the account represented by (m / 44' / 0' / 0').The second account in a wallet consists of the new account/payment code pair created by using an index of 1 in as the account/identity level of both paths.Incoming payments received via this specification are equivalent to payments received to BIP-44 addresses, and unspent outputs from both types of addresses can be used as inputs in the same outgoing transaction.

Hardened derivation is used at this level.Except where noted, all keys derived from a payment code use the public derivation method.Payment codes contain a version byte which identifies a specific set of behavior.Unless otherwise specified, payment codes of different versions are interoperable.If Alice uses a version x payment code, and Bob uses a version y payment code, they can still send and receive transactions between each other.A payment code contains the following elements: When a payment code is presented to the user, it SHOULD be presented encoded in Base58Check form.In the following examples, Alice and Bob are identities with a corresponding payment codes.Alice initiates a Bitcoin transaction, and Bob is the recipient of the transaction.It is assumed that Alice can easily obtain Bob's payment code via a suitable method outside the scope of the payment code protocol.Prior to the first time Alice initiates a transaction to Bob, Alice MUST inform Bob of her payment code via the following procedure: Note: this procedure is used if Bob uses a version 1 payment code (regardless of the the version of Alice's payment code).

If Bob's payment code is not version 1, see the appropriate section in this specification.Now that Bob's client has received Alice's payment code, it is possible for Alice to send payments (up to 2 payments) to Bob.Alice will never again need to send a notification transaction to Bob.Bitcoins received via notification transactions require special handling in order to avoid privacy leaks: Alice SHOULD use an input script in one of the following standard forms to expose a public key, and compliant applications SHOULD recognize all of these forms.Compatible wallets MAY provide a method for a user to manually specify the public key associated with a notification transaction in order to recover payment codes sent via non-standard notification transactions.Incautious handling of change outputs from notification transactions may cause unintended loss of privacy.The recipient of a transaction which spends a change output from a prior notification transaction will learn about the potential connection between the sender and the recipient of the notification transaction.

The following actions are recommended to reduce this risk: Because Bob learns Alice's payment code as part of the process of receiving a payment, Bob has all the information he needs in order to send a refund to Alice.A refund transaction is identical to a payment transactions, with only the roles of the participants switches.Bob MUST send a notification transaction to Alice prior to the first time he sends funds to Alice, even if he has received transactions from her in the past.If Alice does not want her payment to Bob to be associated with her identity, she generates an ephemeral payment code to use for the transaction.Normal operation of a payment code-enabled wallet can be performed by an SPV client and does not require access to a complete copy of the blockchain.Recovering a wallet from a seed, however, does require access to a fully-indexed blockchain.The required data may be obtained from copy of the blockchain under the control of the user, or via a publicly-queriable blockchain explorer.

When querying a public blockchain explorer, wallets SHOULD connect to the explorer through Tor (or equivalent) and SHOULD avoid grouping queries in a manner that associates ephemeral addresses with each other.Previously-spendable funds will generally not be lost or become inaccessible after a recovery from a seed, but all information regarding previous outgoing payments will be lost.In order to recover received funds from a seed, the wallet must obtain every notification it has ever received to its notification address, including all spent transactions.It then re-establishes its lookahead window for each subchain by scanning every derived address sequentially until it locates a contiguous block of unused addresses of a user-specified length.The metadata which a wallet must store to properly process outgoing transactions consists of: Wallets using payment codes generally should not be shared across multiple devices, given the need to synchronize metadata between each instance.If wallets are shared between devices without a synchronization mechanism, undesirable address reuse can occur.

Wallets may perform an OPTIONAL check for existing transactions to an ephemeral deposit addresses prior to sending a transaction by checking a local copy of the blockchain or querying a public blockchain explorer via Tor or equivalent.In order to ensure that no funds will be lost in the event the recipient must recover their wallet from a seed, the sender MUST send a notification transaction the first time the sender interacts with a particular recipient.A recipient MAY choose to designate alternate notification methods which the sender may use in addition to a notification transaction.If the recipient specifies an alternate notification method, a compliant implementation MAY refrain from continually monitoring the notification address and SHOULD check the notification address periodically to detect payments sent by users who can not employ the alternate method.A recipient specifies their preference for alternate notification by setting the appropriate bits in the feature byte of their payment code.

A recipient prefers to receive notifications via Bitmessage indiates this preference by: The sender uses this information to construct a valid notification Bitmessage address: The sender transmits their payment code in base58 form to the calculated Bitmessage address.In order to use Bitmessage notification, the recipient must have a Bitmessage client which listens at the address which the senders will derive and is capable of relaying received payment codes to the Bitcoin wallet.Version 2 payment codes behave identifically to version 1 payment codes, except as modified below.Note: this procedure is used if Bob uses a version 2 payment code (regardless of the the version of Alice's payment code).If Bob's payment code is not version 2, see the appropriate section in this specification.The relative ordering of the payment code identifier and change address pubkey in the above script MAY be randomized Bob detects notification transactions by adding his payment code identifier to his bloom filter.