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refactor(scripts): implement ScriptContext #851

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Merged
merged 1 commit into from
Nov 28, 2023
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refactor(scripts): implement ScriptContext #851

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14 changes: 6 additions & 8 deletions hathor/transaction/scripts/execute.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
from typing import NamedTuple, Optional, Union

from hathor.transaction import BaseTransaction, Transaction, TxInput
from hathor.transaction.exceptions import DataIndexError, FinalStackInvalid, InvalidScriptError, OutOfData, ScriptError
from hathor.transaction.exceptions import DataIndexError, FinalStackInvalid, InvalidScriptError, OutOfData


class ScriptExtras(NamedTuple):
Expand Down Expand Up @@ -54,21 +54,19 @@ def execute_eval(data: bytes, log: list[str], extras: ScriptExtras) -> None:
:raises ScriptError: case opcode is not found
:raises FinalStackInvalid: case the evaluation fails
"""
from hathor.transaction.scripts.opcode import MAP_OPCODE_TO_FN, Opcode
from hathor.transaction.scripts.opcode import Opcode, execute_op_code
from hathor.transaction.scripts.script_context import ScriptContext
stack: Stack = []
context = ScriptContext(stack=stack, logs=log, extras=extras)
data_len = len(data)
pos = 0
while pos < data_len:
opcode, pos = get_script_op(pos, data, stack)
if Opcode.is_pushdata(opcode):
continue
# this is an opcode manipulating the stack
fn = MAP_OPCODE_TO_FN.get(opcode, None)
if fn is None:
# throw error
raise ScriptError('unknown opcode')

fn(stack, log, extras)
# this is an opcode manipulating the stack
execute_op_code(Opcode(opcode), context)

evaluate_final_stack(stack, log)

Expand Down
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