def handle_query(sock, line, rpc, txmonitor):
debug("=> " + line)
try:
query = json.loads(line)
except json.decoder.JSONDecodeError as e:
raise IOError(e)
method = query["method"]
#protocol documentation
#https://github.com/kyuupichan/electrumx/blob/master/docs/PROTOCOL.rst
if method == "blockchain.transaction.get":
tx = rpc.call("gettransaction", [query["params"][0]])
send_response(sock, query, tx["hex"])
elif method == "blockchain.transaction.get_merkle":
txid = query["params"][0]
try:
tx = rpc.call("gettransaction", [txid])
core_proof = rpc.call("gettxoutproof", [[txid], tx["blockhash"]])
electrum_proof = merkleproof.convert_core_to_electrum_merkle_proof(
core_proof)
implied_merkle_root = hashes.hash_merkle_root(
electrum_proof["merkle"], txid, electrum_proof["pos"])
if implied_merkle_root != electrum_proof["merkleroot"]:
raise ValueError
txheader = get_block_header(rpc, tx["blockhash"])
reply = {"block_height": txheader["block_height"], "pos":
electrum_proof["pos"], "merkle": electrum_proof["merkle"]}
except (ValueError, JsonRpcError) as e:
log("WARNING: merkle proof failed for " + txid + " err=" + repr(e))
#so reply with an invalid proof which electrum handles without
# disconnecting us
#https://github.com/spesmilo/electrum/blob/c8e67e2bd07efe042703bc1368d499c5e555f854/lib/verifier.py#L74
reply = {"block_height": 1, "pos": 0, "merkle": [txid]}
send_response(sock, query, reply)
elif method == "blockchain.scripthash.subscribe":
scrhash = query["params"][0]
if txmonitor.subscribe_address(scrhash):
history_hash = txmonitor.get_electrum_history_hash(scrhash)
else:
log("WARNING: address scripthash not known to us: " + scrhash)
history_hash = hashes.get_status_electrum([])
send_response(sock, query, history_hash)
elif method == "blockchain.scripthash.get_history":
scrhash = query["params"][0]
history = txmonitor.get_electrum_history(scrhash)
if history == None:
history = []
log("WARNING: address scripthash history not known to us: "
+ scrhash)
send_response(sock, query, history)
elif method == "blockchain.headers.subscribe":
subscribed_to_headers[0] = True
new_bestblockhash, header = get_current_header(rpc)
send_response(sock, query, header)
elif method == "blockchain.block.get_header":
blockhash = rpc.call("getblockhash", [query["params"][0]])
header = get_block_header(rpc, blockhash)
send_response(sock, query, header)
elif method == "blockchain.block.get_chunk":
RETARGET_INTERVAL = 2016
index = query["params"][0]
tip_height = rpc.call("getblockchaininfo", [])["headers"]
#logic copied from kyuupichan's electrumx get_chunk() in controller.py
next_height = tip_height + 1
start_height = min(index*RETARGET_INTERVAL, next_height)
count = min(next_height - start_height, RETARGET_INTERVAL)
#read count number of headers starting from start_height
result = bytearray()
the_hash = rpc.call("getblockhash", [start_height])
for i in range(count):
header = rpc.call("getblockheader", [the_hash])
#add header hex to result
if "previousblockhash" in header:
prevblockhash = header["previousblockhash"]
else:
# this is the genesis block
# it does not have a previous block hash
prevblockhash = "00"*32
h1 = struct.pack("<i32s32sIII", header["version"],
binascii.unhexlify(prevblockhash)[::-1],
binascii.unhexlify(header["merkleroot"])[::-1],
header["time"], int(header["bits"], 16), header["nonce"])
result.extend(h1)
if "nextblockhash" not in header:
break
the_hash = header["nextblockhash"]
send_response(sock, query, binascii.hexlify(result).decode("utf-8"))
elif method == "blockchain.transaction.broadcast":
try:
result = rpc.call("sendrawtransaction", [query["params"][0]])
except JsonRpcError as e:
result = e.message
debug("tx broadcast result = " + str(result))
send_response(sock, query, result)
elif method == "mempool.get_fee_histogram":
result = [] #TODO not handling, sending empty
send_response(sock, query, result)
elif method == "blockchain.estimatefee":
estimate = rpc.call("estimatesmartfee", [query["params"][0]])
feerate = 0.0001
if "feerate" in estimate:
feerate = estimate["feerate"]
send_response(sock, query, feerate)
elif method == "blockchain.relayfee":
networkinfo = rpc.call("getnetworkinfo", [])
send_response(sock, query, networkinfo["relayfee"])
elif method == "server.banner":
networkinfo = rpc.call("getnetworkinfo", [])
blockchaininfo = rpc.call("getblockchaininfo", [])
uptime = rpc.call("uptime", [])
send_response(sock, query, BANNER.format(
detwallets=len(txmonitor.deterministic_wallets),
addr=len(txmonitor.address_history),
useragent=networkinfo["subversion"],
peers=networkinfo["connections"],
uptime=str(datetime.timedelta(seconds=uptime)),
blocksonly=not networkinfo["localrelay"],
pruning=blockchaininfo["pruned"],
donationaddr=DONATION_ADDR))
elif method == "server.donation_address":
send_response(sock, query, DONATION_ADDR)
elif method == "server.version":
send_response(sock, query, ["ElectrumPersonalServer "
+ VERSION_NUMBER, VERSION_NUMBER])
elif method == "server.peers.subscribe":
send_response(sock, query, []) #no peers to report
else:
log("*** BUG! Not handling method: " + method + " query=" + str(query))
def handle_query(sock, line, rpc, txmonitor):
debug("=> " + line)
try:
query = json.loads(line)
except json.decoder.JSONDecodeError as e:
raise IOError(e)
method = query["method"]
#protocol documentation
#https://github.com/kyuupichan/electrumx/blob/master/docs/PROTOCOL.rst
if method == "blockchain.transaction.get":
tx = rpc.call("gettransaction", [query["params"][0]])
send_response(sock, query, tx["hex"])
elif method == "blockchain.transaction.get_merkle":
txid = query["params"][0]
try:
tx = rpc.call("gettransaction", [txid])
core_proof = rpc.call("gettxoutproof", [[txid], tx["blockhash"]])
electrum_proof = merkleproof.convert_core_to_electrum_merkle_proof(
core_proof)
implied_merkle_root = hashes.hash_merkle_root(
electrum_proof["merkle"], txid, electrum_proof["pos"])
if implied_merkle_root != electrum_proof["merkleroot"]:
raise ValueError
txheader = get_block_header(rpc, tx["blockhash"])
reply = {
"block_height": txheader["block_height"],
"pos": electrum_proof["pos"],
"merkle": electrum_proof["merkle"]
}
except (ValueError, JsonRpcError) as e:
log("WARNING: merkle proof failed for " + txid + " err=" + repr(e))
#so reply with an invalid proof which electrum handles without
# disconnecting us
#https://github.com/spesmilo/electrum/blob/c8e67e2bd07efe042703bc1368d499c5e555f854/lib/verifier.py#L74
reply = {"block_height": 1, "pos": 0, "merkle": [txid]}
send_response(sock, query, reply)
elif method == "blockchain.scripthash.subscribe":
scrhash = query["params"][0]
if txmonitor.subscribe_address(scrhash):
history_hash = txmonitor.get_electrum_history_hash(scrhash)
else:
log("WARNING: address scripthash not known to server: " + scrhash)
history_hash = hashes.get_status_electrum([])
send_response(sock, query, history_hash)
elif method == "blockchain.scripthash.get_history":
scrhash = query["params"][0]
history = txmonitor.get_electrum_history(scrhash)
if history == None:
history = []
log("WARNING: address scripthash history not known to server: " +
scrhash)
send_response(sock, query, history)
elif method == "blockchain.headers.subscribe":
subscribed_to_headers[0] = True
if len(query["params"]) > 0:
are_headers_raw[0] = query["params"][0]
new_bestblockhash, header = get_current_header(rpc, are_headers_raw[0])
send_response(sock, query, header)
elif method == "blockchain.block.get_header":
height = query["params"][0]
try:
blockhash = rpc.call("getblockhash", [height])
header = get_block_header(rpc, blockhash)
send_response(sock, query, header)
except JsonRpcError:
error = {
"message": "height " + str(height) + " out of range",
"code": -1
}
send_error(sock, query["id"], error)
elif method == "blockchain.block.headers":
MAX_CHUNK_SIZE = 2016
start_height = query["params"][0]
count = query["params"][1]
count = min(count, MAX_CHUNK_SIZE)
headers_hex, n = get_block_headers_hex(rpc, start_height, count)
send_response(sock, query, {
'hex': headers_hex,
'count': n,
'max': MAX_CHUNK_SIZE
})
elif method == "blockchain.block.get_chunk":
RETARGET_INTERVAL = 2016
index = query["params"][0]
tip_height = rpc.call("getblockchaininfo", [])["headers"]
#logic copied from kyuupichan's electrumx get_chunk() in controller.py
next_height = tip_height + 1
start_height = min(index * RETARGET_INTERVAL, next_height)
count = min(next_height - start_height, RETARGET_INTERVAL)
headers_hex, n = get_block_headers_hex(rpc, start_height, count)
send_response(sock, query, headers_hex)
elif method == "blockchain.transaction.broadcast":
try:
result = rpc.call("sendrawtransaction", [query["params"][0]])
except JsonRpcError as e:
result = str(e)
debug("tx broadcast result = " + str(result))
send_response(sock, query, result)
elif method == "mempool.get_fee_histogram":
mempool = rpc.call("getrawmempool", [True])
#algorithm copied from the relevant place in ElectrumX
#https://github.com/kyuupichan/electrumx/blob/e92c9bd4861c1e35989ad2773d33e01219d33280/server/mempool.py
fee_hist = defaultdict(int)
for txid, details in mempool.items():
fee_rate = 1e8 * details["fee"] // details["size"]
fee_hist[fee_rate] += details["size"]
l = list(reversed(sorted(fee_hist.items())))
out = []
size = 0
r = 0
binsize = 100000
for fee, s in l:
size += s
if size + r > binsize:
out.append((fee, size))
r += size - binsize
size = 0
binsize *= 1.1
result = out
send_response(sock, query, result)
elif method == "blockchain.estimatefee":
estimate = rpc.call("estimatesmartfee", [query["params"][0]])
feerate = 0.0001
if "feerate" in estimate:
feerate = estimate["feerate"]
send_response(sock, query, feerate)
elif method == "blockchain.relayfee":
networkinfo = rpc.call("getnetworkinfo", [])
send_response(sock, query, networkinfo["relayfee"])
elif method == "server.banner":
networkinfo = rpc.call("getnetworkinfo", [])
blockchaininfo = rpc.call("getblockchaininfo", [])
uptime = rpc.call("uptime", [])
nettotals = rpc.call("getnettotals", [])
send_response(
sock, query,
BANNER.format(
detwallets=len(txmonitor.deterministic_wallets),
addr=len(txmonitor.address_history),
useragent=networkinfo["subversion"],
peers=networkinfo["connections"],
uptime=str(datetime.timedelta(seconds=uptime)),
blocksonly=not networkinfo["localrelay"],
pruning=blockchaininfo["pruned"],
recvbytes=hashes.bytes_fmt(nettotals["totalbytesrecv"]),
sentbytes=hashes.bytes_fmt(nettotals["totalbytessent"]),
donationaddr=DONATION_ADDR))
elif method == "server.donation_address":
send_response(sock, query, DONATION_ADDR)
elif method == "server.version":
send_response(
sock, query,
["ElectrumPersonalServer " + VERSION_NUMBER, VERSION_NUMBER])
elif method == "server.peers.subscribe":
send_response(sock, query, []) #no peers to report
else:
log("*** BUG! Not handling method: " + method + " query=" + str(query))