Blockchaininfo get raw transaction
This example is taken from http: Thanks to the Wizard of Ozzie who actually used some of his own Bitcoins to make a transaction and then published the private key blockchaininfo get raw transaction to make it the account is now empty, so blockchaininfo get raw transaction no risk to him in publishing it. We can use the information on the blockchain page together with the private key to carry out some of the raw calculations involved in the transaction.
The transaction can be viewed at blockchain. From this page we can get both the signature value and the public key used to sign it. Blockchaininfo get raw transaction are under the Input Scripts heading. Normally we don't have the corresponding private blockchaininfo get raw transaction for a transaction, but in this case we do. We can verify that this matches the given public key by reading in the hex representation of the private key to an "internal" key string and then querying that for the public key.
To enable us to verify the signature later, we read in the public key to an internal key string and make some checks. We can also compute the HASH digest value of the public key, which we will see used below as part of the input to the signature.
Note that this is a hash of the sequence of bytes 0x04,0x2D,0xAA, We can use the Hash. HexFromHex method here to compute this directly. To get the final transaction in hex, add? After adding some whitespace and newlines to show the fields for clarity, the final transaction can be reproduced as follows:.
You can see the signature in the above da The amount of the transaction 0. The rules to derive the bytes of the raw transaction that is actually signed from the output above are explained in wonderful detail by Ken Shirriff at Bitcoins the hard way: Using the raw Bitcoin protocol. The end result for the raw data-to-be-signed in this case is the byte sequence 01 be66e10dae7aeac1f91cdd1d6dfd7af2a24d 19 76 a9 14 dd6cce9fa8cc17bda8badf8ecbe 88 ac ffffffff 01 23ce 19 76 a9 14 2bc89ce0edb7d59eb5ce2f0fb 88 ac Note the HASH digest of the public key dd6cce We can compute the HASH digest of the input data.
Some applications display the double SHA digest value in reverse order, so we show it above for interest. However, we always use the "correct" order shown first. Hence the double hash. That's why we use the Sig. VerifyDigest method, not Blockchaininfo get raw transaction.
One of the problems with the ECDSA signature scheme is that it uses a different secret random value usually blockchaininfo get raw transaction as k each time. So every time you recompute the signature you will get a different result, and you can blockchaininfo get raw transaction reproduce the same value.
For reference, we can compute a replicable signature over the same data using the deterministic digital signature generation procedure of [ RFC ].
This will always give the same result and can also be verified using the same public key. This procedure has been suggested as a standard for Bitcoin transactions. Here is the quick-and-dirty source code in C to carry out all of the above zipped 2.
A free trial edition is available here. For more information, or to comment on this page, please send us a message. Reproducing a raw Bitcoin transaction. The first hex string is the ECDSA signature in ASN1-DER structure followed by "01" dabdafbffefefbaedbce35d05eabda58cd50aacc25efeffae9e 01 and the second hex string is the public key in X9. To verify the signature, we need four things: We have the signature value and the public key, and we know the signature algorithm is ecdsaWithSHAbut we need to obtain the exact sequence of bytes of the original data that was signed.
To do this we start with the final transaction blockchaininfo get raw transaction hex format.
The fee required for a transaction to quickly confirm varies according to network conditions. Generally it floats around slowly, but sometimes it shoots up due to spam transactions or a series of randomly-slow blocks.
In such cases, you may find that your incoming or outgoing transactions blockchaininfo get raw transaction stuck in 0-conf status for a long time. Blockchaininfo get raw transaction page gives exact instructions on how to increase the fee on a transaction that blockchaininfo get raw transaction currently stuck in order to make it unstuck. This is always done by creating a new transaction that will either spend the coins sent by the stuck transaction called child-pays-for-parentor CPFP or replace the stuck transaction called replace-by-feeor RBF.
The instructions vary significantly depending on your wallet software. Find your wallet in the table of contents, and then go to the section labeled "I sent the stuck transaction" or "I received the stuck transaction", as appropriate.
In blockchaininfo get raw transaction cases, the instructions here become kludgy. Any time you're working outside of the normal wallet GUI, you're doing something that the developer didn't intend, and this could have negative consequences. Although we have tried to give good instructions, we can't guarantee that everything will work perfectly. If your wallet GUI doesn't directly support fee bumping, then the lowest-risk thing for you to do is to not bump the fee, and to just wait.
This page is for those situations where you can't just wait. Often, the instructions on this page have to get pretty complicated. Almost certainly, fine-tuning would result in a better fee rate, but the above instructions try to be very general and conservative in the sense of having the highest chance of unsticking your transaction.
Blockchaininfo get raw transaction you enabled "Replaceable" when sending the transaction, find the stuck transaction in the History list, right click it, and choose "Increase fee". Electrum will guide you through it. Locate the stuck transaction in the Coins tab. Send this transaction with a high fee. You can send it to an address in the same wallet if you want.
Often it's possible to trick a wallet into bumping fees on sent transactions, but there's no general set of instructions for doing it on all wallets, unfortunately. If you're using a "wallet" that is actually a Bitcoin bank eg. Send slightly more than the confirmed balance of your entire wallet to yourself.
For example, if you have a 2 BTC confirmed balance and a stuck transaction causing an unconfirmed balance of 0. This forces the usage of some of your unconfirmed balance, which is what you want. Some wallets might not allow this, in which case nothing can be done without switching wallets. Send this transaction with a very high fee.
Note that sending your entire balance like this totally destroys your privacy by linking together all of the coins in your wallet. Retrieved from " https: Navigation menu Personal tools Create account Log in. Views Read Blockchaininfo get raw transaction source View history. Sister projects Essays Source.
This page was last edited on 6 March blockchaininfo get raw transaction, at Content is available under Creative Commons Attribution 3. Privacy policy About Bitcoin Wiki Disclaimers.
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