ScriptPubKey is the second half of a script discussed later. Through the scripting system, the sender transaction create transaction complex conditions that people have to meet in order to claim the output's value. Hash Read View source View history. Generations have a single input, and this input has a " coinbase " parameter instead of hash scriptSig. With bitcoin-qt you can look in bitcoin transaction history and right click your transaction to find more info, bitcoin the txid.
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It, combined with the public key, proves the transaction was created by the real owner of the address in question. Views Read View source View history. Want to add to the discussion? The script contains two components, a signature and a public key. I'm playing satoshi bones and they have verification code I can run to make sure they're playing by their own rules. All of the new transaction's input values that is, the total coin value of the previous outputs referenced by the new transaction's inputs are added up, and the total less any transaction fee is completely used by the outputs of the new transaction.
Bitcoin how it works: Because each output from one transaction can only ever be referenced once by an input of a subsequent transaction, the entire combined input value needs to be sent hash an output if you don't want to lose it. Any input bitcoins not transaction in an output is considered a transaction fee ; whoever generates the block will get it. Become a Redditor and subscribe to one of thousands of communities. Various flags define how the hash is simplified and can be used to bitcoin different types of payment. With bitcoin-qt you can look in your transaction history and right click your transaction to find more info, including the txid. Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
An output contains instructions for sending bitcoins. ScriptPubKey is the second half of a script discussed later. There can be more than one output, and they share the combined value of the inputs.
Because each output from one transaction can only ever be referenced once by an input of a subsequent transaction, the entire combined input value needs to be sent in an output if you don't want to lose it. Any input bitcoins not redeemed in an output is considered a transaction fee ; whoever generates the block will get it. To verify that inputs are authorized to collect the values of referenced outputs, Bitcoin uses a custom Forth-like scripting system.
The input's scriptSig and the referenced output's scriptPubKey are evaluated in that order , with scriptPubKey using the values left on the stack by scriptSig. The input is authorized if scriptPubKey returns true. Through the scripting system, the sender can create very complex conditions that people have to meet in order to claim the output's value. For example, it's possible to create an output that can be claimed by anyone without any authorization.
It's also possible to require that an input be signed by ten different keys, or be redeemable with a password instead of a key.
It is possible to design more complex types of transactions, and link them together into cryptographically enforced agreements. These are known as Contracts. A Bitcoin address is only a hash, so the sender can't provide a full public key in scriptPubKey.
When redeeming coins that have been sent to a Bitcoin address, the recipient provides both the signature and the public key. The script verifies that the provided public key does hash to the hash in scriptPubKey, and then it also checks the signature against the public key.
P2SH addresses were created with the motivation of moving "the responsibility for supplying the conditions to redeem a transaction from the sender of the funds to the redeemer. They allow the sender to fund an arbitrary transaction, no matter how complicated, using a byte hash" 1. Pay-to-Pubkey-hash addresses are similarly a byte hash of the public key. Pay-to-script-hash provides a means for complicated transactions, unlike the Pay-to-pubkey-hash, which has a specific definition for scriptPubKey, and scriptSig.
The specification places no limitations on the script, and hence absolutely any contract can be funded using these addresses. In the future, many wallets and online services will display this tx ID to you when you send Bitcoin somewhere as confirmation that the funds were sent. It is useful to produce if a payment is disputed or can't be found, however. So they can look up the transaction on a block explorer. They should be able to do that with just their receive address too so don't know why they are bothering you with it.
If the seller uses a single address generally a bad idea , them he needs to ask for the txid to keep track of who sent how much. Use of this site constitutes acceptance of our User Agreement and Privacy Policy.
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