38 lines
697 B
Python
38 lines
697 B
Python
# third-party imports
|
|
from hexathon import (
|
|
add_0x,
|
|
strip_0x,
|
|
)
|
|
|
|
# local imports
|
|
from chainlib.eth.rpc import jsonrpc_template
|
|
|
|
|
|
def nonce(address):
|
|
o = jsonrpc_template()
|
|
o['method'] = 'eth_getTransactionCount'
|
|
o['params'].append(address)
|
|
o['params'].append('pending')
|
|
return o
|
|
|
|
|
|
class DefaultNonceOracle:
|
|
|
|
def __init__(self, address, conn):
|
|
self.address = address
|
|
self.conn = conn
|
|
self.nonce = self.get()
|
|
|
|
|
|
def get(self):
|
|
o = nonce(self.address)
|
|
r = self.conn.do(o)
|
|
n = strip_0x(r)
|
|
return int(n, 16)
|
|
|
|
|
|
def next(self):
|
|
n = self.nonce
|
|
self.nonce += 1
|
|
return n
|