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implementation of min price

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This commit is contained in:
Frederico 2024-12-16 22:05:28 +01:00
parent 702fb35b7b
commit ec8dc2f433
1 changed files with 24 additions and 12 deletions
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36
transaction_fee_models/tx_fees_models.py
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@ -9,7 +9,8 @@ import copy
PROTOCOL_CONSTANTS = {
"TARGET_GAS_USED": 12500000.0, # 12.5 million gas
"MAX_GAS_ALLOWED": 25000000.0, # 25 million gas
"INITIAL_BASEFEE": 1.0, # 10^9 wei
"INITIAL_BASEFEE": 1.0, # 10^9 wei = 1 Gwei
"MIN_PRICE": 0.1, # 10^8 wei = 0.1 Gwei
}
@ -120,7 +121,8 @@ def create_demand(
) -> List[Transaction]:
# these are levels that need to be scaled by the price/base fee of the specific transaction fee model
fee_caps = (1. + np.random.uniform(fee_cap_range[0], fee_cap_range[1], num_txs))
fee_caps = 1. + np.random.normal(fee_cap_range[0], fee_cap_range[1], num_txs)
#fee_caps = (1. + np.random.uniform(fee_cap_range[0], fee_cap_range[1], num_txs))
tip = np.random.uniform(0., max_tip_pct, num_txs) # 0.1 is the max gas premium factor
if variable_gas:
@ -196,7 +198,7 @@ class TransactionFeeMechanism:
return scaled_demand
def _select_from_sorted_txs(
self, sorted_txs:List[Transaction], stop_below_gas_limit:bool=False, scale_block_size:float=1.0
self, sorted_txs:List[Transaction], stop_below_gas_limit:bool=False, scale_block_size:float=1.0, purge_after:int=4
) -> Tuple[List[Transaction], List[Transaction]]:
# select transactions so that the sum of gas used is less than the block gas limit
@ -213,7 +215,7 @@ class TransactionFeeMechanism:
for tx in sorted_txs:
if gas_used + tx.gas_used < fac * PROTOCOL_CONSTANTS["TARGET_GAS_USED"]:
selected_txs_idx += 1
if gas_used + tx.gas_used < 4 * PROTOCOL_CONSTANTS["MAX_GAS_ALLOWED"]: # enough space for 4 full blocks
if gas_used + tx.gas_used < purge_after * PROTOCOL_CONSTANTS["MAX_GAS_ALLOWED"]: # enough space for X full blocks
to_be_purged_txs_idx += 1
else:
break
@ -222,7 +224,7 @@ class TransactionFeeMechanism:
return sorted_txs[:selected_txs_idx], sorted_txs[to_be_purged_txs_idx:]
def select_transactions(
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0, purge_after:int=4
) -> Tuple[List[Transaction], List[Transaction]]:
raise NotImplementedError
@ -247,10 +249,10 @@ class EIP1559(TransactionFeeMechanism):
base_fee * np.exp(delta * self.base_factor) # (1. + delta * self.base_factor)
)
sum_price:float = sum([min(tx.fee_cap, base_fee+tx.tip) for tx in last_txs])
self.price.append(sum_price/float(len(last_txs)))
self.price.append( max(sum_price/float(len(last_txs)), PROTOCOL_CONSTANTS["MIN_PRICE"]) )
def select_transactions(
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0, purge_after:int=4
) -> Tuple[List[Transaction], List[Transaction]]:
base_fee:float = self.base_fee[-1]
@ -262,7 +264,12 @@ class EIP1559(TransactionFeeMechanism):
reverse=True
)
return self._select_from_sorted_txs(sorted_txs, stop_below_gas_limit, scale_block_size)
return self._select_from_sorted_txs(
sorted_txs,
stop_below_gas_limit=stop_below_gas_limit,
scale_block_size=scale_block_size,
purge_after=purge_after
)
def total_paid_fees(self, txs: List[Transaction]) -> float:
base_fee:float = self.base_fee[-1]
@ -276,10 +283,10 @@ class StableFee(TransactionFeeMechanism):
def update_price(self, blockchain:Blockchain):
new_price:float = np.min([tx.fee_cap for tx in blockchain.get_last_block().txs])
self.price.append(new_price)
self.price.append(max(new_price, PROTOCOL_CONSTANTS["MIN_PRICE"]))
def select_transactions(
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0
self, mempool: MemPool, stop_below_gas_limit:bool=False, scale_block_size:float=1.0, purge_after:int=4
) -> Tuple[List[Transaction], List[Transaction]]:
# Sort transactions by fee cap
@ -289,8 +296,13 @@ class StableFee(TransactionFeeMechanism):
reverse=True
)
return self._select_from_sorted_txs(sorted_txs, stop_below_gas_limit, scale_block_size)
return self._select_from_sorted_txs(
sorted_txs,
stop_below_gas_limit=stop_below_gas_limit,
scale_block_size=scale_block_size,
purge_after=purge_after
)
def total_paid_fees(self, txs: List[Transaction]) -> float:
price:float = self.get_current_price()
return sum([price * tx.gas_used for tx in txs])