Differential D9441 Diff 28253 test/functional/test_framework/avatools.py

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test/functional/test_framework/avatools.py

#!/usr/bin/env python3		#!/usr/bin/env python3
# Copyright (c) 2021 The Bitcoin ABC developers		# Copyright (c) 2021 The Bitcoin ABC developers
# Distributed under the MIT software license, see the accompanying		# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.		# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Utilities for avalanche tests."""		"""Utilities for avalanche tests."""

from typing import Any, Optional, List, Dict		from typing import Any, Optional, List, Dict

		from .messages import (
		CTransaction,
		FromHex,
		ToHex
		)
from .test_node import TestNode		from .test_node import TestNode
		from .util import satoshi_round


def get_stakes(node: TestNode,		def get_coinbase_stakes(node: TestNode,
blockhashes: List[str],		blockhashes: List[str],
priv_key: str,		priv_key: str,
amount: Optional[str] = None) -> List[Dict[str, Any]]:		amount: Optional[str] = None) -> List[Dict[str, Any]]:
"""Returns a list of dictionaries representing stakes, in a format		"""Returns a list of dictionaries representing stakes, in a format
compatible with the buildavalancheproof RPC.		compatible with the buildavalancheproof RPC, using only coinbase
		transactions.

:param node: Test node used to get the block and coinbase data.		:param node: Test node used to get the block and coinbase data.
:param blockhashes: List of block hashes, whose coinbase tx will be used		:param blockhashes: List of block hashes, whose coinbase tx will be used
as a stake.		as a stake.
:param priv_key: Private key controlling the coinbase UTXO		:param priv_key: Private key controlling the coinbase UTXO
:param amount: If specified, this overwrites the amount information		:param amount: If specified, this overwrites the amount information
in the coinbase dicts.		in the coinbase dicts.
"""		"""
Show All 10 Lines	def get_coinbase_stakes(node: TestNode,
return [{		return [{
'txid': coinbase['txid'],		'txid': coinbase['txid'],
'vout': coinbase['n'],		'vout': coinbase['n'],
'amount': amount or coinbase['value'],		'amount': amount or coinbase['value'],
'height': coinbase['height'],		'height': coinbase['height'],
'iscoinbase': True,		'iscoinbase': True,
'privatekey': priv_key,		'privatekey': priv_key,
} for coinbase in coinbases]		} for coinbase in coinbases]


		def get_stakes(node: TestNode, count: int) -> List[Dict[str, Any]]:
		"""
		Generate and return a list of stakes by mining enough blocks and splitting
		each coinbase transaction into 10 coins.

		This function can generate more valid stakes than `get_coinbase_stakes`
		does, because on the regtest chain halving happens every 150 blocks so
		the coinbase amount is below the dust threshold after only 900 blocks.

		:param node: Test node used to generate blocks and send transactions
		:param count: Number of stakes to generate.
		"""
		node.generate(int(0.1 * count) + 101)

		utxos = node.listunspent()
		addresses = [node.getnewaddress() for _ in range(10)]

		for i in range(count // 10 + 1):
		u = utxos.pop()
		inputs = [{"txid": u["txid"], "vout": u["vout"]}]
		outputs = {
		addr: satoshi_round(u['amount'] / 10) for addr in addresses}
		raw_tx = node.createrawtransaction(inputs, outputs)
		ctx = FromHex(CTransaction(), raw_tx)
		ctx.vout[0].nValue -= node.calculate_fee(ctx)
		signed_tx = node.signrawtransactionwithwallet(ToHex(ctx))["hex"]
		node.sendrawtransaction(signed_tx)

		while node.getmempoolinfo()['size'] > 0:
		node.generate(1)

		utxos = node.listunspent()
		stakes = []
		for utxo in utxos:
		blockhash = node.gettransaction(utxo["txid"])["blockhash"]
		stakes.append({
		'txid': utxo['txid'],
		'vout': utxo['vout'],
		'amount': utxo['amount'],
		'iscoinbase': utxo['label'] == "coinbase",
		'height': node.getblock(blockhash, 1)["height"],
		'privatekey': node.dumpprivkey(utxo["address"]),
		})

		return stakes[:count]