the number of Satoshis(BTC/108) to be transfered 8 bytes Txout-script length. More precisely, the second component is an ecdsa signature over a hash of a simplified version of the transaction. OP_SUB 148 0x94 a b out b is subtracted from. Value is the number of Satoshi (1 BTC 100,000,000 Satoshi) that this output will be worth when claimed. OP_XOR 134 0x86 x1 x2 out Boolean exclusive or between each bit in the inputs. The script contains two components, a signature and a public key. OP_within 165 0xa5 x min max out Returns 1 if x is within the specified range (left-inclusive 0 otherwise. These examples include the OP_ prefix, but it is permissible to omit. Opcodes which take integers and bools off the stack require that they be no more than 4 bytes long, but addition and subtraction can overflow and result in a 5 byte integer being put on the stack. Bitcoin transaction that requires certain conditions to be met in order for a recipient to spend his/her bitcoins. A standard way of attaching extra data to transactions is to add a zero-value output with a scriptPubKey consisting of OP_return followed by exactly one pushdata. Output An output contains instructions for sending bitcoins.
Equalverify is another opcode that compares the PubKHash value placed in the locking script with the PubKHash value calculated from the PubK placed in the unlocking script using the following hash function: PubKHash If the resulting PubKHash value calculated from the PubK value in the. OP_2DIV 142 0x8e in out The input is divided. For example, it's possible to create an output that can be claimed by anyone without any authorization. These are known as Contracts. It is possible to design more complex types of transactions, and link them together into cryptographically enforced agreements. Provably Unspendable/Prunable Outputs The standard way to mark a transaction as provably unspendable is with a scriptPubKey of the following form: scriptPubKey: OP_return zero or more ops OP_return immediately marks the script as invalid, guaranteeing that no scriptSig exists that could possibly spend that output. You can also use OP_return to add data to a transaction without the data ever appearing in the utxo set, as seen in P2Pool does this with the share chain hash txout in the coinbase of blocks it creates. Bitcoin protocol for transaction processing. Conclusion To conclude, Script is a scripting language that uses a stack-based data structure and has found application within Bitcoin transaction processing due its limited functionality, and therefore, added security.
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