# third-party imports
from chainlib.eth.rpc import jsonrpc_template
from chainlib.eth.tx import Tx
from hexathon import (
        add_0x,
        strip_0x,
        even,
        )

def block():
    o = jsonrpc_template()
    o['method'] = 'eth_blockNumber'
    return o


def block_by_hash(hsh):
    o = jsonrpc_template()
    o['method'] = 'eth_getBlockByHash'
    o['params'].append(hsh)
    return o


def block_by_number(n):
    nhx = add_0x(even(hex(n)[2:]))
    o = jsonrpc_template()
    o['method'] = 'eth_getBlockByNumber'
    o['params'].append(nhx)
    o['params'].append(True)
    return o


class Block:
    
    def __init__(self, src):
        self.hash = src['hash']
        self.number = int(strip_0x(src['number']), 16)
        self.txs = src['transactions']
        self.block_src = src


    def src(self):
        return self.block_src


    def tx(self, i):
        return Tx(self.txs[i], self)


    def tx_src(self, i):
        return self.txs[i]


    def __str__(self):
        return 'block {} {}'.format(self.number, self.hash)