One of the central aspects of the Great Script Restoration proposal is the introduction of a new costing model for opcodes, assigning different costs based on computational requirements.
Andrew Poelstra noted the departure from the current Bitcoin model and highlighted the potential of the new costing model to price scripts more fairly based on resources consumed, preventing spam attacks.
Challenges in implementing the new model include determining script execution time, drawing parallels with Ethereum's gas limit, but with no financial loss for failed Bitcoin transactions.
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