Bitcoin transaction notification
If your incoming Bitcoin or Ethereum receive transaction is not being confirmed, we can only recommend being patient or approaching the sender and asking them to redo the transaction with a higher fee. What does it cost to use Luno? Does Luno charge any fees? How do I receive Bitcoin or Ethereum? Contact us for more help. Buy, store and learn about Bitcoin and Ethereum now. We are using cookies to provide statistics that help us give you the best experience of our site.
You provide an extended public key xPub and we generate a unique, unused corresponding address for your customers to send payment to. We notify you of payments to that address instantly using a callback URL of your choosing.
One of the difficulties involved with receiving bitcoin payments is the need to generate a unique address for each new user or invoice. These addresses need to monitored and stored securely. The blockchain receive payments API takes care of the generation and monitoring of addresses. We will notify your server using a simple callback whenever a payment is received. The easiest way to start receiving payments is to open a Blockchain Wallet at https: You should create a new account inside your wallet exclusively for transactions facilitated by this API.
This method creates a unique address which should be presented to the customer. For any payments sent to this address, you will be sent an HTTP notification. This is done so you do not show the same address to two different customers. However, all funds will still show within the same account. As defined in BIP 44, wallet software will not scan past 20 unused addresses.
Given enough requests from this API that don't have a matching payment, you could generate addresses past this horizon, which would make spending funds paid to those addresses quite difficult. For this reason, this API will return an error and refuse to generate new addresses if it detects it would create a gap of over 20 unused addresses.
It is also possibly for anti-spam systems to mistakenly classify two-factor emails as spam or strip the attachments from them. Please ensure you check your spam folders and give the email time to arrive.
If you regularly have issues receiving email you may wish to adjust your spam settings, whitelist the sender in your client, or move to a more configurable provider. GreenAddress is designed to allow you to recover your coins if the service ceases to be available. GreenAddress does not currently charge fees for any of its services. If we add a fee for any service in the future, this will be clearly communicated and opt-in. Enterprise clients and those seeking custom solutions are welcome to contact us to discuss arrangements for extra services and support.
The fee you see in the sending transaction dialog is paid to Bitcoin miners to confirm your transaction i. Transactions fees change according to demand on the Bitcoin network. Miners may ignore or delay transactions with extremely low fees. GreenAddress automatically calculates a fee that aims for your transaction to be mined quickly.
We do not aim for the absolute fastest possible confirmation time since doing so may be very expensive. Most of our wallet clients allow you to change the fee. This can be useful if you want to ensure a transaction confirms even more quickly by increasing the default fee , or to lower the fee if you do not care how long the transaction takes to confirm.
Unless you are experienced in using Bitcoin, we suggest you use the default fee calculated for you by the wallet. All GreenAddress wallets provide a confirmation dialog with fee information and a payment is generally denied if the amount is below what the network will accept.
When you send a transaction a fee is included as a reward to the miner that mines the transaction into a block see above. If the fee is set too low the transaction can become stuck because the incentive is not sufficient for a miner to mine it. In this case it is possible to replace the transaction with one with a higher fee. This is called "bump fee" in the client, and is also known as "replace-by-fee" or "RBF".
We have two Android applications, a native application and a Cordova application. Our iOS application is available from the iTunes Store. A Chrome packaged application is available from the Chrome Web Store. All of our applications are open source and you can contribute to their development on GitHub. If you are building a service that will use GreenAddress, we suggest you get in touch to discuss your requirements and ensure your use of the service will be secure. You can try our testnet version at test.
A testnet faucet to receive coins for testing is available at tpfaucet. Please remember to send any testnet coins back to the faucet when you are done testing. We also have a bleeding edge regtest environment and faucet available at regtestwss. This environment is updated regularly and may be restarted without notice. We value your feedback and suggestions. Please feel free to raise issues on GitHub or email us at info greenaddress. We have a long list of planned features and languages that we wish to support.
You can check the existing issues on GitHub for details. If you would like to help with translation please see here. Cookies are unique identifiers that we use to enable our services to recognize your device and provide features such as remembering your language preference and security for some common web issues. We ask you to accept the use of our cookie in accordance with EU law. How can I contact you? What is your support policy? What features does GreenAddress offer?
For a simple high level comparison with similar services please see here. We aim to provide a convenient-to-access wallet that emphasizes security and privacy: Convenience Easy access from anywhere All access controlled by a single user mnemonic phrase A simple interface with up to date fiat price conversion Fast PIN login Watch-only logins for quick balance and transaction checking Instant transaction support Easy key sweeping to import coins Sub-accounts for 2of2 and 2of3 signature transactions Security Multiple two-factor authentication options GreenAddress signature required to move coins Transaction limits and restrictions Hardware wallet support Recovery "nLocktime" transactions 2of3 accounts for user controlled backup keys Privacy User secrets are never transmitted to our servers User secrets are never stored unencrypted on your device Minimal information is stored by the service Optional PGP encryption for user emails What are "2of2" and "2of3" accounts?
What are "instant transactions"? Why am I am being asked to redeposit my funds? Why am I charged a fee to redeposit my 2of2 funds? How can I avoid these 2of2 redeposit fees? Is there any other way of limiting the fees I pay for 2of2 redeposits? What happens if I do not redeposit my 2of2 funds?
The main consequences of not redepositing are: Is it possible to sign arbitrary messages to prove ownership of GreenAddress 2of2 accounts? Do you support Tor? Do you have an Onion site? What currency exchange sources do you support? Can I sweep private keys into my wallet? From the Receive Money tab in our wallet applications, enter your private key and the coins will be swept into your wallet.
I don't see an expected incoming transaction in my wallet! What are the service limits? Can I use it as much as I want? Why does my receiving address change all the time? Can I reuse an old address?