90 lines
3.9 KiB
Python
Executable File
90 lines
3.9 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Test fee estimation code
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#
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from test_framework import BitcoinTestFramework
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from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException
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from util import *
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class EstimateFeeTest(BitcoinTestFramework):
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def setup_network(self, test_dir):
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nodes = []
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nodes.append(start_node(0, test_dir,
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["-debug=mempool", "-debug=estimatefee"]))
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# Node1 mines small-but-not-tiny blocks, and allows free transactions.
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# NOTE: the CreateNewBlock code starts counting block size at 1,000 bytes,
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# so blockmaxsize of 2,000 is really just 1,000 bytes (room enough for
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# 6 or 7 transactions)
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nodes.append(start_node(1, test_dir,
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["-blockprioritysize=1500", "-blockmaxsize=2000",
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"-debug=mempool", "-debug=estimatefee"]))
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connect_nodes(nodes[1], 0)
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# Node2 is a stingy miner, that
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# produces very small blocks (room for only 3 or so transactions)
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node2args = [ "-blockprioritysize=0", "-blockmaxsize=1500",
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"-debug=mempool", "-debug=estimatefee"]
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nodes.append(start_node(2, test_dir, node2args))
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connect_nodes(nodes[2], 0)
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sync_blocks(nodes)
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return nodes
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def run_test(self, nodes):
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# Prime the memory pool with pairs of transactions
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# (high-priority, random fee and zero-priority, random fee)
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min_fee = Decimal("0.001")
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fees_per_kb = [];
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for i in range(12):
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(txid, txhex, fee) = random_zeropri_transaction(nodes, Decimal("1.1"),
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min_fee, min_fee, 20)
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tx_kbytes = (len(txhex)/2)/1000.0
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fees_per_kb.append(float(fee)/tx_kbytes)
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# Mine blocks with node2 until the memory pool clears:
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count_start = nodes[2].getblockcount()
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while len(nodes[2].getrawmempool()) > 0:
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nodes[2].setgenerate(True, 1)
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sync_blocks(nodes)
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all_estimates = [ nodes[0].estimatefee(i) for i in range(1,20) ]
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print("Fee estimates, super-stingy miner: "+str([str(e) for e in all_estimates]))
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# Estimates should be within the bounds of what transactions fees actually were:
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delta = 1.0e-6 # account for rounding error
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for e in filter(lambda x: x >= 0, all_estimates):
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if float(e)+delta < min(fees_per_kb) or float(e)-delta > max(fees_per_kb):
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raise AssertionError("Estimated fee (%f) out of range (%f,%f)"%(float(e), min_fee_kb, max_fee_kb))
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# Generate transactions while mining 30 more blocks, this time with node1:
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for i in range(30):
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for j in range(random.randrange(6-4,6+4)):
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(txid, txhex, fee) = random_transaction(nodes, Decimal("1.1"),
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Decimal("0.0"), min_fee, 20)
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tx_kbytes = (len(txhex)/2)/1000.0
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fees_per_kb.append(float(fee)/tx_kbytes)
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nodes[1].setgenerate(True, 1)
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sync_blocks(nodes)
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all_estimates = [ nodes[0].estimatefee(i) for i in range(1,20) ]
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print("Fee estimates, more generous miner: "+str([ str(e) for e in all_estimates]))
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for e in filter(lambda x: x >= 0, all_estimates):
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if float(e)+delta < min(fees_per_kb) or float(e)-delta > max(fees_per_kb):
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raise AssertionError("Estimated fee (%f) out of range (%f,%f)"%(float(e), min_fee_kb, max_fee_kb))
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# Finish by mining a normal-sized block:
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while len(nodes[0].getrawmempool()) > 0:
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nodes[0].setgenerate(True, 1)
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sync_blocks(nodes)
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final_estimates = [ nodes[0].estimatefee(i) for i in range(1,20) ]
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print("Final fee estimates: "+str([ str(e) for e in final_estimates]))
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if __name__ == '__main__':
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EstimateFeeTest().main()
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