Ethereum Miners and Gas – Analyzing Chain Data

Currently looking at https://medium.com/google-cloud/how-to-query-balances-for-all-ethereum-addresses-in-bigquery-fb594e4034a7 and in the SQL Query to calculate address balances there is a part for tranasction feed debits miners incur? How does that work? Miners are spending gas to mine? — transaction fees debits select miner as address, sum(cast(receipt_gas_used as numeric) * cast(gas_price as numeric)) as value from `bigquery-public-data.crypto_ethereum.transactions` as transactions join…

Rinkeby node unable to sync block

Error log: INFO [01-16|03:24:01.401] Mapped network port proto=tcp extport=2001 intport=2001 interface=”UPNP IGDv1-IP1″ INFO [01-16|03:24:01.611] Mapped network port proto=udp extport=2001 intport=2001 interface=”UPNP IGDv1-IP1″ INFO [01-16|03:24:03.046] New local node record seq=4 id=eca86066e72a2ed6 ip=192.168.32.129 udp=2001 tcp=2001 INFO [01-16|03:24:09.066] Block synchronisation started WARN [01-16|03:24:30.023] Node data write error err=”state node b83436…251d48 failed with all peers (1 tries, 1 peers)”…

How come Blockchain Voting is decentralised and secure if it’s controlled by ethereum network?

I’m building a voting Dapp using ethereum blockchain but I have a doubt. The best thing about blockchain is that it’s decentralized, transparent and secure i.e. no middleman or centralized server controls it. But if it’s on ethereum, isn’t it controlled by ethereum? If someone hacks it or tampers it, we go back to recentralise…

Can someone explain the difference between using metamask or web3 to send ether from truffle accounts?

I am using web3 and truffle (i am a newbie wants to understand concept) I need to transfer ether so i understand that i need to use web3.eth.sendtransaction But will it work as i am using localhost and ethereum bridge to connect with oraclize? Or is it possible to use metamask to facilitate transaction between…

Token transfer gas is different in rinkeby and private chain

After set up a private clique chain and issued a ERC20 token contract. I compared token transfer gas between estimated amount by web3.eth.estimateGas() and used gas from transaction log. They are identical, say numberA Using same contract, also tried on Rinkeby testnet. although the estimated and used gas is still same. however its absolute value…