November 2018
Intermediate to advanced
528 pages
13h 21m
English
Content preview from Blockchain By Example
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Bitcoin scripting
One of the amazing features of the bitcoin system is the ability to set a script defining the conditions that a recipient should validate to spend the bitcoins later, making bitcoin a programmable currency. Fundamentally, all bitcoin transactions have scripts, written in the Bitcoin programming language, included in their inputs and outputs. This language is a Forth-like language offering a set of opcodes or instructions, evaluated from left to right using a stack to determine the success or failure of the script execution.
Normally, the transaction embeds into its inputs an unlocking script commonly called ScriptSig and a locking script called ScriptPubkey into its outputs. When a transaction is validated, the concatenation ...
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