Raw Transactions - BitcoinWiki

Aeon

Aeon (AEON) is a private, secure, untraceable currency. You are your bank, you control your funds, and nobody can trace your transfers.
[link]

Masari: Simple Private Money

Masari (MSR) is a scalability-focused, untraceable, secure, and fungible cryptocurrency using the RingCT protocol. Masari is the first CryptoNote coin to develop uncle mining and a fully client side web wallet.
[link]

Determining type from raw bitcoin transaction

Say I have a list of addresses my wallet controls. Assume it's got a mix of receive and change addresses. When retrieving the transaction list, each tx has inputs and outputs (as expected)
If I want to determine the 'type' of transaction (sent or received), will the following series of steps work:
1) if the previous output of any tx input was unlocked by an address in the list I have, the transaction is likely a 'sent' type.
2) If not, it's the 'received' type.
My understanding is that I don't need to check the tx outputs because either way (sent or received) there are probably utxos that'll be locked to an address in the list given that sent types would probably have change back.
submitted by notacooleagle to Bitcoin [link] [comments]

Understanding a Raw Bitcoin Transaction

Understanding a Raw Bitcoin Transaction submitted by incredulousPrejudice to Bitcoin [link] [comments]

How to Create a Raw Bitcoin Transaction Step by Step

How to Create a Raw Bitcoin Transaction Step by Step submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

Any way to submit a raw Bitcoin transaction to the Ledger Nano S?

Is there any way (via a third party wallet with Ledger support maybe) to submit a raw transaction to the Ledger for signing?
submitted by RaptorXP to ledgerwallet [link] [comments]

Broadcast bitcoin raw transaction using Electrum?

Hello,
Is possible to broadcast a raw bitcoin transaction using Electrum? If yes, how can i do it?
Thank you!
submitted by BeautyLifeforever to Bitcoin [link] [comments]

CLI scripts for using an account

Hello community - does anyone have any account scripts for the bitcoin CLI? I want to do various things like create a wallet, send and receive trx through my full node but am not that proficient at the bitcoin CLI. I need some help with actually pushing transactions and such. Anyone have a library of account related scripts i could snag? Thanks.

Edit: I now understand that its complicated to do anything other than basically look at general information. Gotta perform a bunch of coded math problems which I am not in a position to try to master right now. Here's one example:
https://medium.com/coinmonks/how-to-create-a-raw-bitcoin-transaction-step-by-step-239b888e87f2
Am going to configure my full node to be my electrum node so I can bypass all the technical on-ramping.
submitted by zipatauontheripatang to Bitcoin [link] [comments]

r/Bitcoin recap - December 2019

Hi Bitcoiners!
I’m back with the 36th monthly Bitcoin news recap.
For those unfamiliar, each day I pick out the most popularelevant/interesting stories in Bitcoin and save them. At the end of the month I release them in one batch, to give you a quick (but not necessarily the best) overview of what happened in bitcoin over the past month.
You can see recaps of the previous months on Bitcoinsnippets.com
A recap of Bitcoin in December 2019
Adoption
Development
Security
Mining
Business
Education
Regulation & Politics
Archeology (Financial Incumbents)
Price & Trading
Fun & Other
submitted by SamWouters to Bitcoin [link] [comments]

Helping Venezuela using Bitcoin

Venezuela is in an interesting situation where Bitcoiners may be in a unique position to help. As far as I've heard, most Venezuelans have decent Internet access, and they are also readily able to accept foreign packages. But even so, many people are starving due to various government nonsense. One major issue with the government (though certainly not the only issue) is that the Venezuelan currency is in hyperinflation. Bitcoin could be used as an alternative medium of exchange in Venezuela, and apparently this is already happening to a small extent. And separately from Bitcoin, as far as I can tell it'd be very much possible to ship supplies into Venezuela in order to help people there.
It'd be nice if someone trustworthy on the ground in Venezuela could organize the following activities:
There are some existing charities for helping Venezuela, but I suspect that a large percentage of donations to these charities end up in the hands of the government itself or government supporters. I'd like donations to go only to people who are not supportive of the government (or, even better, to those who actively oppose it).
Due to various not-yet-perfectly-solved technical issues, raw Bitcoin transactions are a bit cumbersome for day-to-day medium-of-exchange purposes. Therefore, it may be best to distribute OpenDime devices preloaded with set denominations of BTC, with the amount of BTC written on stickers on the devices. (I have some security concerns regarding OpenDime's current design, but it'll suffice for now.)
Does this sound like a good idea? Would you donate? Does anyone know of any trustworthy Venezuelans who would/could organize something like this?
submitted by theymos to Bitcoin [link] [comments]

What is Arf wallet? How do we it FREE and INSTANT? How are we different from LN?

It involves a platform (third party) that eliminates friction for users in terms of ease of onboarding, ease of operation, transaction speed and transaction cost. Similar to Lightning Network and Liquid, it interacts with Bitcoin but introduces a chain of operations to ensure instant and minimal-fee Bitcoin transfers without compromising users security.
To be specific, it is:
(1) the counterparty in a 2-of-2 multisignature address when a user creates an account, (2) the enabler of instant transactions by being the guarantor for the receiving party once the sender signed the initial transaction, (3) the aggregator of partially-signed unspent transaction outputs (UTXOs) and merge them into cheaper transactions in terms of fees (satoshis per byte), (4) the address book generator, mapping email addresses to Bitcoin addresses and notifying users
Obviously, the most important design choice is the addition of a third party to the system, namely the platform itself, which naturally raises questions on "trust". It is important to understand that:
• the platform is non-custodial, which means the platform by itself is unable to create any transaction that is not signed by the user first, • users will not experience any loss of funds in case either the platform or the user's system got hacked, • as a necessary trade-off in favor of fund security, if users lose their private keys, they will be unable to recover their funds, • there are no operational risks for users like in Lightning Network, namely, possible loss of funds in case of getting offline or a crashed hard drive, • everybody can participate in contrast to Blockstream Liquid, which only accepts cryptocurrency or digital asset exchanges
HOW EXACTLY DO WE DO AN INSTANT BITCOIN TRANSACTION?
In order to enable instant transactions with Bitcoin, an off-chain mechanism should be introduced to finalize the transaction without committing final state to Bitcoin chain. In the proposed design, users will create an account on the platform which is presented as a wallet application. During that process, a 2-of-2 multisignature Native Pay-to-Witness-Script-Hash (P2WSH) address is created using the public keys of the user and the platform. After that point, users may deposit to or withdraw from that specific multisignature address. This mechanism is similar to Lightning Network’s Funding Transaction to open payment channels, or Green Address wallet creation. Once the multisignature address is successfully funded by the user, they may spend their Bitcoin (e.g. create transactions) via signing their UTXOs and sending it to the platform for the final signature. The whole account creation and spending process will work as follows:
(1) user will create a random seed in the wallet application and the first private and public key is created using the "BIP-32: Hierarchical Deterministic Wallets" method. Both seed and keys will never leave the (mobile) application, (2) user will send its public key to the platform, (3) platform will create a 2-of-2 multisignature Native Pay-to-Witness-Script-Hash (P2WSH) address using the users and its own public key and share that address with the user, (4) user will fund that address with Bitcoin, (5) user will query their Bitcoin balance and UTXOs, (6) user will create a raw Bitcoin transaction using the required amount of UTXOs as inputs and receiver addresses and amounts as outputs, (7) user will sign the raw transaction with signature hash type SIGHASH_NONE|SIGHASH_ANYONECANPAY (where single input is signed and all the other inputs and outputs are modifiable) or SIGHASH_SINGLE|SIGHASH_ANYONECANPAY (where single input and single output is signed and all the other inputs and outputs are modifiable), (8 ) user will send the partially-signed raw transaction to the platform to be signed and sent to the Bitcoin network, (9) platform will receive the partially-signed raw transaction, verify it and queue it for aggregation, (10) platform will signal the receiving party (merchant or user of the platform) instantly about payment completion and credit that user in the system in an off-chain way, (11) platform will finalize the aggregated transaction, add the required transaction fee based on network conditions, sign it with SIGHASH_ALL and broadcast it to the network
As seen in the flow above, the platform has the capability to signal the completion of payment to the receiver, once the sender has signed the initial transaction. However, besides all the improvements, the proposed system introduces two disadvantages. The first one is, due to the use of multisignature addresses the transaction sizes are bigger than the regular Bitcoin transactions. Roughly, a single signature is 70 bytes and a compressed public key in hexadecimal format is 33 bytes, so every additional signature (which is one in our case) adds up 100 bytes to the transaction. The second disadvantage is about internal risk. The platform notifies the receiver about payment completion however that state is not reflected on-chain. Basically, the platform is carrying this internal risk until the settlement is complete. Luckily, both of these disadvantages can either be eliminated or significantly reduced. Bitcoin is on the verge of adopting Schnorr signatures, that will reduce the multisignature size overhead drastically. Instead of storing all the signatures for every required party separately, Schnorr signature scheme makes it possible to use the space for just one signature, independent of the number of required signatures. About the second disadvantage, it would be possible for the platform to manage its internal risk by sending transactions more frequently. The platform may utilize two metrics: "total accumulated Bitcoin size in pending transactions" and "passed time since the last sent transaction" to dynamically reduce its risk.
HOW DO WE DO IT FREE?
Well, it's not exactly free for the platform in general but our process reduces fees so much that we are able to offer it free for end users.
Bitcoin transaction fee is a game-theoretic construct that is measured in satoshis per byte and fluctuates depending on the congestion of the Bitcoin network in terms of pending transactions (i.e. size of mempool). Highest historic daily average Bitcoin transaction fee is estimated as 985 satoshis per byte on the 12th of December 2017, right in the middle of the Bitcoin price spike. Even today, with all the custodial exchange wallets and Lightning Network, spikes in the exchange rate still trigger jumps in transaction fee unit prices. For example, on the 20th May 2019 average transaction fee price jumped to 212 satoshis per byte. In a nutshell, there are only two parameters that can be used to decrease the transaction fee: space and time. Currently, the most cost effective scheme to create transactions is using native SegWit (bech32) addresses. Based on savings for various transaction types, our 2-of-2 multisignature address case goes as high as 49%. On the other hand, it is possible to reduce transaction fees by just being "patient". If transaction confirmation is not urgent, it is possible to wait confirmation for a couple days and pay up to 92% less.
The platform not only utilizes both of these techniques (using bech32 addresses and patient spending) but also implements additional optimizations that are only possible by design. The unique opportunities for optimization are:
(1) aggregate and spend only completely consumed UTXOs, therefore saving up one output per payment attempt, per user (i.e. do not ever create and send to change addresses) (2) aggregate payments to same addresses together (i.e. SIGHASH_NONE|SIGHASH_ANYONECANPAY and SIGHASH_SINGLE|SIGHASH_ANYONECANPAY makes it possible to modify outputs) (3) aggregated transactions will be relatively big (over tens of inputs and outputs) and even though the satoshi per byte unit price is slightly lower compared to the other pending transactions, the higher mining fee alone will be attractive for adding that single aggregated transaction to the blockchain
These design choices come with a disadvantage: there are no change addresses created for the user and until the whole single UTXO is spent (or withdrawn by the user) the final state will not be visible on-chain. Once again, this is a calculated risk for the platform.
HOW ARE YOU DIFFERENT THAN THE LIGHTNING NETWORK
Lighting Network is a payment solution built on top of Bitcoin, that promises an instant, trustless and cheap way of making transactions. Lightning Network, is a peer-to-peer network, where peers are able to "lock" their Bitcoin on chain and able to transfer it to other parties via "channels". It is designed to create a network of micropayment channels that will address the scalability problem of the Bitcoin network. LN offers instant transactions on its off-chain payment channels, where on-chain transaction finality is reached after a number of transactions are routed off-chain, through a single channel or several channels based on channel liquidity and available nodes.
The routing capability of each lightning channel is determined by the funds locked on-chain by each peer with a significant trade-off which requires that both the sending and receiving end of a given channel must be funded at least by the amount of the transfer for a seamless routing. This brings about a serious liquidation shortage if a Bitcoin amount x must be routed through n number of channels. In such a case, not only must the entire route be funded with the amount of 2xn but also each of the locked funds yn on both the receiving and sending ends of the nodes must be greater than or equal to the amount of transfer x (yn ≥ x).
For example, if Peer A wants to transfer $10 to Peer C and this payment will be routed through Peer B then; The route A -> B -> C must be funded with at least 2 x 2 x $10 = $40 with the following channel fund distribution:
A -> $10 on sending end (sending to B), B -> $10 on receiving end (Receiving from A) + $10 on sending end (Sending to C) = $20, C -> $10 on receiving end (Receiving from B)
It is also critical to mention that this type of routing also requires that each of the peers A, B and C must maintain full Bitcoin nodes at all times that are never allowed to go offline. This requirement is to prevent the so-called fraudulent channel close where one peer (online) broadcasts the entire channel fund to the Bitcoin blockchain without the knowledge of the other (offline). It is also a major issue for user onboarding since opening, maintaining and funding an LN node require a relatively significant amount of technical know-how. To mitigate this issue, LN is working on so-called “Watchtowers” which are basically third party operators that are responsible for node maintenance. This is a trade-off in LN’s trustless structure in favor of better user experience where receiving parties must trust the watchtower operators with their funds. Another common trade-off is observed in third party products built on top of the LN where custodial wallets are generated on hosted LN nodes where wallet owners trust the third party products with channel liquidity, channel uptime and their funds.
Another shortcoming of the Lightning Network emerges in case of merchant payments where a merchant must keep all of their channels liquid enough to be able to continuously receive payments. If Peer C was a merchant in the above example they would not be able to transfer the $10 they received from A to a non-LN wallet if they wanted to keep receiving payments from the same channel. This problem is exacerbated by the recent beta release of “Lightning Loop” which allows a peer to transfer part of their locked channel funds to another wallet without closing the channel. If Peer C had used Lightning Loop to pull $5 from the channel before the transfer occurred they wouldn’t have been able to receive $10 from Peer A because of insufficient liquidation on their receiving end.
submitted by RufusJules to Arfone [link] [comments]

New proof of concept service called "Preferred Miner" lets you submit valid signed raw transactions to be processed by the miner(s) of your choosing

Hi everyone, I made this website Preferred Miner http://preferredminer.com which stores your valid signed raw Bitcoin transactions until your preferred miner(s) processes them.
Screenshot: http://i.imgur.com/acmksNi.png

How it works:

Use your Bitcoin wallet client or a service like Coinb.in to create and sign a regular valid Bitcoin transaction. Instead of broadcasting it to the normal mempool, paste your raw hex into Preferred Miner and select your favourite miner(s). Finish by confirming and submitting your transaction to Preferred Miner, then wait for it to be processed like any other Bitcoin transaction.

The catch is lower than low priority:

None of the miners/pools have agreed to accept or process the transactions provided to them by the Preferred Miner service yet, so I can't assure you that your transaction will ever be mined. My hope is that if the service is popular, miners will accept transactions in real time from the Preferred Miner API. Until then, I will be collecting transactions and holding them until they are formally accepted by the designated miner, even if that never happens.

Why it's interesting:

Personally, I like the idea of expressing my support for the political positions and BIP signalisation of particular miners. There is very little you can do as a Bitcoin end user to "put your money where your mouth is" and I see two main reasons why a minepool might like to accept user-submitted transactions from the Preferred Miner Segregated Mempool/API:
  1. As with transactions broadcast to the conventional mempool, Preferred Miner transactions could contain higher fees if users provide a higher-than-normal fee.
  2. In times where the blocks are not full of transactions, the miner could then process some of their earmarked Preferred Miner backlog, allowing them to collect fees during a drought.

Examples:

Is this a joke?

Well it's more an experiment, but there's an ethical question here to say the least. Do we really want to be using miners like service providers? It's probably worth exploring if this can be a new way for end users of Bitcoin to express their support for specific features, or otherwise discussing the concept before we find some way to kill it. What do you think?
http://preferredminer.com
submitted by ajwest to btc [link] [comments]

UK Crypto Job / Project Offer (Paid)

UK Crypto Job / Project Offer (Paid)
Good morning and Happy Monday!!1
We're still recruiting people to join our team of Python coders with Raspberry Pi GPIO experience near North London for our summer coding project. If you've finished school, university and are looking for a summer job - this would be perfect! Alternatively, if you're a freelancer and want to join our project team, this could also be for you. And if you're after a career and have long term vision, do also contact us. We're an equal opportunities employer - experience or none, so long as you have the skills, apply!
We're after someone with passion, skill and inventiveness, particularly someone that wants to be part of an exciting new development in Blockchain and Crypto. You should know how to create raw Bitcoin transactions, know Python (C is a bonus) and understand Bitcoin wallets and APIs. A knowledge of other Cryptos would also be a bonus...
The role is to join our team. We'll get you up to speed with our hardware / software and system architecture patent pending tech. And (for the right applicant in the longer term), there may be an opportunity to get in on ICO, etc. But for the first project, this is very much a paid role.
Dennis Nedry need not apply ;)
CVs, or a letter with some examples of your work to [[email protected]](mailto:[email protected])
Find out a bit more about what we do at https://www.Torricel.com and take a look at our video...
Torricel - Securing Blockchain.
submitted by torricel to BitcoinUK [link] [comments]

How To Use Coin Control & Stake More With 'PoS' DEAL Coins

How To Use Coin Control & Stake More With 'PoS' DEAL Coins
When you are using Proof of Stake (PoS) coins, active coin control is essential to ensuring that you maximize your PoS rewards. If you do not use coin control you may benefit less from the compounding of your rewards, and you may lose more rewards than necessary when you make a payment from your wallet.
Exactly how much difference this makes will depend on the specifications of the coin itself, and what transactions you make. It is particularly important for coins such as IdealCash, in which small and medium-sized holders must wait a long time between each time they stake and get a reward.
This presents a manual method of coin control for users of Qt wallets!
Why You Need to Use Coin Control
As I already stated, small and medium-sized IdealCash holders must wait a long time before they stake. When you do finally get to stake some coins, you do not get the interest due on your whole balance; instead, one of the payments you have received is selected and you earn the rewards due on that amount. The rest of your interest is not lost, it keeps building up and you get it later. But what this means is that if you receive a single payment for 10,000 coins, for example, you will earn more compound interest than if you receive 10 payments for 1,000 coins, even though your balance is the same. This is because in both cases you will wait the same amount of time before getting your first reward, but in the first instance you will receive all of your interest at once, whereas in the second example you will receive only 10% as much on your first stake. Because you can earn PoS rewards on your PoS rewards (compounding) that mean you will eventually end up with more money in the first example when you got a single payment than you would in the second example where you got 10 payments that added up to the same amount.
In the example above you could easily fix this without getting into any advanced techniques simply by using your wallet in the ordinary way to send yourself 10,000 coins. By doing this you would combine all of the outputs – all 10 of the 1,000 IdealCash payments – into a single output. But sometimes things can be a little more complicated. For example, let's say you receive a single payment of 10,000 coins, and leave it in your wallet to stake. After 8 weeks you still haven’t earned your first reward, but have built up a nice bit of ‘interest owed’ on these coins. You now receive those 10 payments for 1,000 each we looked at before. When you spend any coins in your wallet, you lose the unpaid rewards owed to you for staking them. So in this example, you would want to send a 10,000 IdealCash payment to yourself using these 10 new payments. But if you simply use the wallet as normal to send a payment to yourself it will probably not do this – it will use the 10,000 you got in your first deposit, destroying your earned rewards and doing nothing to consolidate the smaller payments. To do this, you need to be able to specify which outputs (which payments received) you want to use to create your transaction; that is what I am going to show you how to accomplish in this guide.
Coin control can also be useful when sending payments from your wallet. By specifying which outputs to use in order to make a payment you can ensure that you are not losing rewards unnecessarily. Please be aware, however, that when sending payments to somebody else you will probably need to send yourself change because each output is used entirely in each transaction. I will explain this properly later on in the guide, but for now just be aware that if you don’t do this you may lose some of your coins.
Manual Coin Control Using the Qt Wallet Console
Manual coin control requires you to use the console rather than the GUI. That means instead of just selecting options from menus, you have to manually type commands. These commands must be precise and use the correct grammar or they won’t work, so please read the instructions carefully and check that you have typed each command correctly before hitting enter.
To open a console window you just need to click ‘Help’ from the navigation menu of your wallet, then select ‘Debug Window’. This will open up a new window with two tabs: click ‘console’ to get to the tab that we are going to use here.
Step One: List Unspent Outputs In your console window type “listunspent” (without the quotation marks) and hit enter. This will give you a list of all the outputs of previous transactions which belong to you, or in more plain language, all of the payments that you have received.
Each one will appear between curly brackets and should look something like this:
{
"txid" : "a long list of random looking characters should be here",
"vout" : "this should be a number",
"address" : "this is the IdealCash address belonging to you that these coins where sent to",
"account" : "",
"scriptPubKey" : "another long list of random looking characters",
"amount" : "the number of coins you received",
"confirmations" : "the number of confirmations for this transaction"
}
You can use this list to select the outputs you want to use to make a payment. For example, IdealCash owners may want to select smaller and newer outputs (newer outputs will have fewer confirmations) and leave any older and larger ones.
When you have chosen which ones you want to use, make a note of the exact “amount” for each one. If you have received coins with more than one address then you will also need a list of each address that appears in one of the outputs you are going to use.
Once you have made a note of these things separately, we only need the “txid”, “vout” and “scriptPubKey” to put into the next step. You may like to copy and paste each one into a text editor and then delete every line apart from those three, to leave something like this:
{
"txid" : "a long list of random looking characters should be here",
"vout" : "this should be a number",
"scriptPubKey" : "another long list of random looking characters"
}
Notice that I have removed the comma from the end of the “scriptPubKey” line. Commas must always be included at the end of each line, apart from the last one. This is one of those annoying grammar things that you have to get right (and which I personally mess up more often than not). Don’t worry too much, if you get this kind of thing wrong you won’t lose any coins, it just won’t accept the command. Also please note that if you are not a programmer then you officially will be after you’ve done this, so feel free to be a bit proud of yourself.
Creating a Raw Transaction
The next step is to use the outputs we have selected to build the code for a complete transaction.
You should have a list of edited outputs from the last section. Put them, complete with brackets, into the command below:
createrawtransaction '[output1, output2]' '{"address you want to send coins to" : number of coins to send}' The number of coins you are sending must be exactly equal to total of all the outputs you have used minus the transaction fee (0.01). It is very important that you get this right as you could lose coins if you make a mistake here. For example, if you have one output with an amount of 1,000 and another with an amount of 2,000 then you must send 2999.99 coins (1000+2000-0.01). If you were to make a mistake and send just 2,000 coins, then you would end up paying a fee of 1,000 coins that you would never see again.
To give you an idea of what this should look you can see an example of a raw bitcoin transaction taken from this Reddit thread below:
createrawtransaction '[{"txid":"c7e5e03d2ab5458819eedec46d0ba38ca7a6525e38b493073277cf4a1550a348","vout":1,"scriptPubKey":"76a9144a06df74729aef1dce5e4641960da3a439d2460b88ac"},
{"txid":"c7e5e03d2ab5458819eedec46d0ba38ca7a6525e38b493073277cf4a1550a348","vout":0,"scriptPubKey":"76a914f88262828f5e64b454249e4c45ddb6071a2ab0a988ac"}]'
'{"Dty3qVvYyggQJnYfaXupbHRAPVhUxr1vso":0.17543376,"DwzkF4gP1xRoFKA4YvJpNFR9qvYzaWrFaE":0.17543375}'
IdealCash and most other altcoins will use the exact same format. In this example you can hopefully see that two addresses are listed to send coins to, with an amount for each one and a comma between them. If you are manually creating a transaction to send coins to somebody else then you will probably need to do this, because you will probably need to select outputs which add up to more than the amount you want to send, and then send the change to yourself. For example, you may have outputs of 10 and 15, but you want to send 20 coins – so you need to send the remaining 5 to your own address, otherwise they will be added to the transaction fee and lost.
When you have pasted this command into the console and hit enter, if you have managed to get all the grammar right, then you will get a long list of random looking characters as a response. This is your ‘raw transaction hex code’. Copy this for use in the next step.
Signing Your Transaction
You now need to sign your transaction with the private keys of all addresses used in the outputs you chose earlier. You can find your private key for any address using the following console command:
dumpprivkey
Obviously, you should replace
with the public address you want to get the private key for. If you have encrypted your wallet then you will need to unlock it before doing this.
You can now sign your raw transaction using the following command:
signrawtransaction 'your hex code generated in the last step' '[output1, output2]' '["privatekeyone", "privatekeytwoifneeded"]'
The middle section with output1 and output2 should be exactly the same as you used in the last step when you created the raw transaction.
When you hit the enter button on that command you will get a new, signed hex code. Copy and paste that into the final command:
Sending Your Transaction
The last bit is easy:
sendrawtransaction 'your signed hex code' When you hit enter on that final command your transaction will be broadcast to the network and your console will reply with a transaction id. If you have used this to send coins to yourself in order to consolidate smaller payments for staking, then your wallet GUI should now show ‘payment to yourself -0.01’.
submitted by Tyler__Z to IdealCash [link] [comments]

"Preferred Miner" website collects valid raw transactions for processing by the miner(s) of your choosing

Hi everyone, I made this website Preferred Miner http://preferredminer.com which stores your valid signed raw Bitcoin transactions until your preferred miner(s) processes them.
Screenshot: http://i.imgur.com/acmksNi.png

How it works:

Use your Bitcoin wallet client or a service like Coinb.in to create and sign a regular valid Bitcoin transaction. Instead of broadcasting it to the normal mempool, paste your raw hex into Preferred Miner and select your favourite miner(s). Finish by confirming and submitting your transaction to Preferred Miner, then wait for it to be processed like any other Bitcoin transaction.

The catch is lower than low priority:

None of the miners/pools have agreed to accept or process the transactions provided to them by the Preferred Miner service yet, so I can't assure you that your transaction will ever be mined. My hope is that if the service is popular, miners will accept transactions in real time from the Preferred Miner API. Until then, I will be collecting transactions and holding them until they are formally accepted by the designated miner, even if that never happens.

Why it's interesting:

Personally, I like the idea of expressing my support for the political positions and BIP signalisation of particular miners. There is very little you can do as a Bitcoin end user to "put your money where your mouth is" and I see two main reasons why a minepool might like to accept user-submitted transactions from the Preferred Miner Segregated Mempool/API:
  1. As with transactions broadcast to the conventional mempool, Preferred Miner transactions could contain higher fees if users provide a higher-than-normal fee.
  2. In times where the blocks are not full of transactions, the miner could then process some of their earmarked Preferred Miner backlog, allowing them to collect fees during a drought.

Examples:

Is this a joke?

Well it's more an experiment, but there's an ethical question here to say the least. Do we really want to be using miners like service providers? It's probably worth exploring if this can be a new way for end users of Bitcoin to express their support for specific features, or otherwise discussing the concept before we find some way to kill it. What do you think?
http://preferredminer.com
submitted by ajwest to Bitcoin [link] [comments]

[Hiring] Fix my script for decoding raw transactions. (PHP)

Hey, I've written a script that decodes raw bitcoin transactions. However, I can't get it to work with variable integer fields when they're greater than 1 byte.
If this makes sense, here's the script: http://pastebin.com/MUAwrVRY
There's 0.04BTC if you can get it working for var_ints.
submitted by in3rsha to Jobs4Bitcoins [link] [comments]

[ANN] coinpit.io A futures trading platform and exchange

coinpit.io

Global Bitcoin Futures Market

coinpit.io futures exchange offers futures contracts denominated in Bitcoin. Currently, we offer inverse USD/BTC contracts. More contracts will be added based on demand.

Bitcoin is the currency

We are a pure Bitcoin in/out exchange and do not deal with any fiat. This makes our exchange robust and avoids exchange rate risk.

Cryptographically guarded funds

coinpit.io aims to be an exchange that mitigates the most severe fiduciary risks on crypto-exchanges. We use multi-sig addresses where the user’s private key is never transmitted to the exchange, assuring that a security breach cannot compromise user’s funds, making this exchange immune to failure from theft from internal or external agents. The user’s funds are always available for future withdrawal as a raw bitcoin transaction, and in case the exchange shuts down, users can simply publish the transaction to the bitcoin network to recover their coins. Its an exchange where your money is mathematically proven to not be lost in the event of an exchange failure or shutdown. Your finances are on the blockchain and not a database entry. And yet performs fast enough for high volumes.

Continuous contracts

We to offer electronically settled, continuous contracts. They are settled mark-to-market on a periodic basis.

World-class trading platform

coinpit.io brings world-class trading platform to bitcoin. From a variety of entry orders (Limit, Stop Limit, Stop Market, Market) to automatic target and stop loss orders with OCO, you can focus more on reading the market and less on actively managing the trade.
coinpit.io Testnet trade site Issue reporting /coinpit
submitted by coinpit to Bitcoin [link] [comments]

Signing Raw Multisig Transactions

I'm trying to find some way to sign raw bitcoin transactions using my trezor.
For example I generated a multisig bitcoin address using one of my trezor keys and another non-trezor key.
I have now generate a raw transaction spending from the multisig address, but I cannot find out a way to sign this using the trezor, i've tried:
I know i can manually retrieve the private key from the address from the BIP39 recovery seed...but this defeats the purpose of the trezor.
RAW TRANSACTION:
01000000015256ccac47fa9a650beee0c885b6ada89bc0ba4014e576cf51995b841ae631270100000047522102ff9c66d28d27747563ed0bdf2c64bd975f2deeef3ba6a3c3e24ace434cbb2c67210211e6a976d2abb7a5c9e08ab06f681cd4632bbd0b1ba4383d6ad0a815f144746352aeffffffff0180380100000000001976a9148d9fb587c75aac6be04766b0f294922f89a4f9ff88ac00000000
submitted by bitcointhailand to TREZOR [link] [comments]

[ANN] coinpit.io Bitcoin futures platform and Exchange (x-post from /r/bitcoin)

coinpit.io

Global Bitcoin Futures Market

coinpit.io futures exchange offers futures contracts denominated in Bitcoin. Currently, we offer inverse USD/BTC contracts. More contracts will be added based on demand.

Bitcoin is the currency

We are a pure Bitcoin in/out exchange and do not deal with any fiat. This makes our exchange robust and avoids exchange rate risk.

Cryptographically guarded funds

coinpit.io aims to be an exchange that mitigates the most severe fiduciary risks on crypto-exchanges. We use multi-sig addresses where the user’s private key is never transmitted to the exchange, assuring that a security breach cannot compromise user’s funds, making this exchange immune to failure from theft from internal or external agents. The user’s funds are always available for future withdrawal as a raw bitcoin transaction, and in case the exchange shuts down, users can simply publish the transaction to the bitcoin network to recover their coins. Its an exchange where your money is mathematically proven to not be lost in the event of an exchange failure or shutdown. Your finances are on the blockchain and not a database entry. And yet performs fast enough for high volumes.

Continuous contracts

We to offer electronically settled, continuous contracts. They are settled mark-to-market on a periodic basis.

World-class trading platform

coinpit.io brings world-class trading platform to bitcoin. From a variety of entry orders (Limit, Stop Limit, Stop Market, Market) to automatic target and stop loss orders with OCO, you can focus more on reading the market and less on actively managing the trade.
coinpit.io Testnet trade site Issue reporting /coinpit
submitted by coinpit to btc [link] [comments]

You can still use this Bitcoin Cash equivalent of coinb.in to create, sign, verify, and broadcast raw transactions on BSV.

You can still use this Bitcoin Cash equivalent of coinb.in to create, sign, verify, and broadcast raw transactions on BSV. submitted by cryptorebel to bitcoincashSV [link] [comments]

Found this tool for Bitcoin Cash, its supposed to be a fork of coinb.in and allows you to create and broadcast raw transactions, create multisigs, verify transactions, etc...

Found this tool for Bitcoin Cash, its supposed to be a fork of coinb.in and allows you to create and broadcast raw transactions, create multisigs, verify transactions, etc... submitted by cryptorebel to btc [link] [comments]

07-02 21:04 - 'Broadcast Raw Transaction | Garlicoin Insight' (insight.garli.co.in) by /u/Bobazahary removed from /r/Bitcoin within 16-26min

Broadcast Raw Transaction | Garlicoin Insight
Go1dfish undelete link
unreddit undelete link
Author: Bobazahary
submitted by removalbot to removalbot [link] [comments]

06-27 00:33 - 'Recommend BitKey wallet on iOS platform. / BitKey provides pure tools for users to generate and sign transactions. / Also You can make UTXO level TX and get the raw transaction data. You can broadcast your transaction use any ope...' by /u/Rotoava removed from /r/Bitcoin within 0-9min

'''
Recommend BitKey wallet on iOS platform.
BitKey provides pure tools for users to generate and sign transactions.
Also You can make UTXO level TX and get the raw transaction data. You can broadcast your transaction use any open api or your nodes.
The transaction out-input graphic is also useful. Before you broadcast your TX you can check the information to avoid mistakes.
Appstore: [link]1
Website: [link]2
'''
Context Link
Go1dfish undelete link
unreddit undelete link
Author: Rotoava
1: *tunes.apple.c**/*s/a**/*itke*-bitcoin-**l*et/*d898**3317*mt*8 2: bitkey*ap*
Unknown links are censored to prevent spreading illicit content.
submitted by removalbot to removalbot [link] [comments]

I made a bitcoin faith raw transaction but cant submit it "missing inputs"

hey, i installed the bitcoin faith client but didnt sync the blockchain as its to slow
i created a raw transaction and signed it
020000000142e734e49408fb0929f3f3e63eca1dc4d38bf9e412d0e9636845a77ff054d011010000006b483045022100d683b39929c45f7b9d23494f1890915467a9ef2863e3995add0b515696473aaf02205f5740e2672460794266e2d2bec5472f8b793d00540bf5ca25e019656862a00e4121020ddb66ae6d3831b4c9e7f411261a0f5952683b0f1e63d2db728c60534e300951ffffffff015c320a03000000001976a914220b0bf90850ffa0021e3ffb0dfbf79471d82f2888ac00000000
when i use the sendrawtranscation in the client i get the "missing inputs code -25)
What could be the reason for this? this is my first time working with raw transactions at all, so help appreciated
here is how I created the tx
createrawtransaction '[{"txid":"11d054f07fa7456863e9d012e4f98bd3c41dca3ee6f3f32909fb0894e434e742","vout":1,"scriptPubKey":"76a914174717dcb06e31159479d01e2fa04888e7b12ac988ac"}]' '{"FYGieyWdeKeqerN5EXuTed5UTbquAFRr5d":0.509999}'
submitted by altcoinfucker to BitcoinAirdrops [link] [comments]

ES Bitcoin Transaction Constructing a Bitcoin transaction using python - 3/5 Datapay - Broadcast BitCoin Transactions w/ 4 lines of code! How To Get Your Bitcoin Transaction Confirmed with CPFP ... Transactions and the utxo - transactions and utxo's - a ...

Raw Transaction Format¶. Bitcoin transactions are broadcast between peers in a serialized byte format, called raw format.It is this form of a transaction which is SHA256(SHA256()) hashed to create the TXID and, ultimately, the merkle root of a block containing the transaction—making the transaction format part of the consensus rules. (note that Bitcoin-Qt/bitcoind automatically re-transmit wallet transactions periodically until they are accepted into a block). Validate a transaction without broadcasting it . If you have a raw transaction and want to make sure all of its signatures are correct, you can use the signrawtransaction API call. Pass in the hex-encoded raw ... In this post, I will create a raw transaction, fund and sign it, and finally send it to the bitcoin network. But first, why the need of raw transactions when you can simply send a transaction using… According to the list from other question, to build a raw transaction I need: listunspent - you get the list of all unspent transactions You determine which ones you want to spend You use Transaction Properties Create a raw transaction. Lets create a transaction from scratch! Let’s use Output 1 from the transaction above: $ bitcoin-cli -regtest ...

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ES Bitcoin Transaction

How To Build Raw Bitcoin Transactions in NodeJS - Duration: 16:57. m1xolyd1an 5,119 views. 16:57 . LOOPHOLE IN THE BLOCKCHAIN TO GET ANY PRIVATE KEY, FACT!!! - Duration: 18:36. the pirate maniac ... Get R, S and Z values from Raw Bitcoin Transaction - Duration: 10:42. BitMen 3,533 views. 10:42. Bitcoin SV price fluctuates wildly - What are the use cases and fundamentals of BSV? transactions and the utxo - Using bitcore I've created the private_key to sign the transactions and the utxos as follow: privateKey = new bitcore transaction... Bitcoin: How to Create a Raw Transaction - Duration: 6 minutes, 12 seconds. 13,982 views; 4 years ago; 8:22. How To Double Spend Your Stuck Bitcoin Transaction with FSS-RBF - Duration: 8 minutes ... In this video we show you how to pay for Entrepreneur Society membership in bitcoin!

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