A Python library for interacting and working with the Woop blockchain.
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pywiki/pyhmy/util.py

112 lines
3.8 KiB

import json
import subprocess
import os
import sys
import datetime
import requests
datetime_format = "%Y-%m-%d %H:%M:%S.%f"
class Typgpy(str):
"""
Typography constants for pretty printing.
Note that an ENDC is needed to made the end of a 'highlighted' text segment.
"""
HEADER = '\033[95m'
OKBLUE = '\033[94m'
OKGREEN = '\033[92m'
WARNING = '\033[93m'
FAIL = '\033[91m'
ENDC = '\033[0m'
BOLD = '\033[1m'
UNDERLINE = '\033[4m'
def get_gopath():
"""
:returns The go-path, assuming that go is installed.
"""
return subprocess.check_output(["go", "env", "GOPATH"]).decode().strip()
def get_goversion():
"""
:returns The go-version, assuming that go is installed.
"""
return subprocess.check_output(["go", "version"]).decode().strip()
def is_active_shard(endpoint, delay_tolerance=60):
"""
:param endpoint: The endpoint of the SHARD to check
:param delay_tolerance: The time (in seconds) that the shard timestamp can be behind
:return: If shard is active or not
"""
payload = """{
"jsonrpc": "2.0",
"method": "hmy_latestHeader",
"params": [ ],
"id": 1
}"""
headers = {
'Content-Type': 'application/json'
}
try:
curr_time = datetime.datetime.utcnow()
response = requests.request('POST', endpoint, headers=headers, data=payload, allow_redirects=False, timeout=3)
body = json.loads(response.content)
time_str = body["result"]["timestamp"][:19] + '.0' # Fit time format
timestamp = datetime.datetime.strptime(time_str, "%Y-%m-%d %H:%M:%S.%f").replace(tzinfo=None)
time_delta = curr_time - timestamp
return abs(time_delta.seconds) < delay_tolerance
except (requests.ConnectionError, json.decoder.JSONDecodeError, KeyError):
return False
def get_bls_build_variables():
"""
:returns The environment variables needed to build and/or run programs that
use the Harmony BLS & MCL repo.
:raises RuntimeError if openssl is not found.
Note that this assumes that the BLS & MCL repo are in the appropriate directory
as stated here: https://github.com/harmony-one/harmony/blob/master/README.md
"""
variables = {}
try:
openssl_dir = subprocess.check_output(["which", "openssl"]).decode().strip().split("\n")[0]
except (IndexError, subprocess.CalledProcessError) as e:
raise RuntimeError("`openssl` not found") from e
hmy_path = f"{get_gopath()}/src/github.com/harmony-one"
bls_dir = f"{hmy_path}/bls"
mcl_dir = f"{hmy_path}/mcl"
assert os.path.exists(bls_dir), f"Harmony BLS repo not found at {bls_dir}"
assert os.path.exists(mcl_dir), f"Harmony MCL repo not found at {mcl_dir}"
if sys.platform.startswith("darwin"):
variables["CGO_CFLAGS"] = f"-I{bls_dir}/include -I{mcl_dir}/include -I{openssl_dir}/include"
variables["CGO_LDFLAGS"] = f"-L{bls_dir}/lib -L{openssl_dir}/lib"
variables["LD_LIBRARY_PATH"] = f"{bls_dir}/lib:{mcl_dir}/lib:{openssl_dir}/lib"
variables["DYLD_FALLBACK_LIBRARY_PATH"] = variables["LD_LIBRARY_PATH"]
else:
variables["CGO_CFLAGS"] = f"-I{bls_dir}/include -I{mcl_dir}/include"
variables["CGO_LDFLAGS"] = f"-L{bls_dir}/lib"
variables["LD_LIBRARY_PATH"] = f"{bls_dir}/lib:{mcl_dir}/lib"
return variables
def json_load(string, **kwargs):
"""
:param string: The JSON string to load
:returns A dictionary loaded from a JSON string to a dictionary.
:raises The exception caused by the load (if present).
Note that this prints the failed input should an error arise.
"""
try:
return json.loads(string, **kwargs)
except Exception as e:
print(f"{Typgpy.FAIL}Could not parse input: '{string}'{Typgpy.ENDC}")
raise e from e