Questions tagged [proof-of-authority]

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Parity proof of authority aura, how to detect misbehaviour?

I'm having trouble finding the answer looking at the Parity POA aura examples, the documentation on Parity Validator Sets, plus the Kovan validator set contract solidity source code. I see that you ...
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1answer
22 views

Connecting to Rinkeby using Infura and calling a state-changing function from smart contract

So i have trouble using a smart contract on Rinkeby through infura as it gives an "extra-data" error, which as far as i have read, is due to Rinkeby being a POA testnet. There are suggestions of using ...
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20 views

Azure Custom genesis.json

Can any one tell me how to deploy Custom genesis.json file on Microsoft Azure ? I tried exploring all option but did not get nay option to upload custom genesis file.
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Why after managing to deploy contract to POA Ethereum blockchain I can't interact with it? [duplicate]

We are using a private ETH proof of authority blockchain. In order to deploy a contract I'm using 0 gas price and it deployed immediately. Then, Tried to deploy many types of contracts with ...
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How to create an ethereum private network with proof of authtority without gas cost or gas price zero?

I want to create a private network but I don't need to use ether or gas, only I want to run smart contracts and the blockchain using ethereum technology. I find this tutorial Private proof of ...
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How are the initial authoritative nodes determined in the PoA consensus protocol?

I am studying the different consensus protocols available. The Proof of Authority model claims to have a set of trusted nodes who are accountable for the validation and verification steps. My ...
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22 views

Proof of Authority identification and verification?

Exactly what documents are asked for being a validator and how is the validator identity verified?
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35 views

Randomised DPOS for Ethereum VM?

Clique (POA) seems to have awesome configuration possibilities to make it work like a DPoS or a randomised DPoS DPoS : Selects a set of masternodes (maybe 18-25?) which have staked native fuel (ETH ...
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2answers
308 views

Geth Proof of Authority Implementation

I have implemented PoA on private blockchain with following genesis.json. { "config": { "chainId": 1515, "homesteadBlock": 1, "eip150Block": 2, "eip150Hash": "...
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1answer
129 views

Connect different machines with PoA

i want to connect two different machines in a ethereum private network! I did it before with a normal PoW-Consesus but with PoA created by puppeth i cant see some Peers when i try: admin.peers ...
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33 views

Delay on receiving block by peered node

Sometimes it takes an around of 25ms to import new block by the other peered node after mined by miner. But sometimes it increases directly around 400ms to import block by peered node after mined by ...
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1answer
61 views

Understanding what happens between transaction creation and block creation in Proof of Authority

I am currently writing my thesis where I'm investigating the potential of blockchain technology to become the underlying technology in a system that is create and record qualifications. I'm at the ...
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1answer
227 views

Clique PoA Private Blockchain: Need Suggestion for Block Gas Target and Block Gas Limit

I'm following this article to create my own PoA private blockchain. Now I'm stucked at this section after number 13: I've checked the Puppeth source code and Geth CLI docs, but I'm still not quite ...
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Puppeth: No ethstats server configured

Update This is an issue with Docker Compose >= 1.23.0 and I've raised this in the go-ethereum GitHub issues tracker. I'm following this guide to create my own private blockchain using PoA consensus. ...
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2answers
178 views

Parity configuration for maximum throughput

What’s the recommended approach for configuring a private ethereum network using Parity to achieve the highest possible transaction throughput? Which is theoretically around 1000 TPS. Let’s say my ...
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1answer
200 views

Transaction throughput: POA vs POW in private blockchain networks

I know that proof of work is resource intensive, while proof of authority is much faster as no consensus is required since the network is validated by the proper authorities. But in terms of the ...
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0answers
114 views

Defining a block reward contract in Parity Aura consensus

I've been looking at creating a block reward contract for Parity (as documented here). I'm wondering if I would be able to model a system using this that would send all the wei spent on a transaction ...
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1answer
196 views

Deploy contract as Authority in Parity PoA private chain

I deployed a Proof of Authority chain with 2 nodes, but when I try to deploy a contract with one authority account, it says that there is unsufficient fund in the account. I though PoA didn't rely on ...
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2answers
179 views

Read state from smart contract deployed to azure proof of authority ethereum network

I deployed a smart contract to an azure proof of authority network(ethereum). Following the instructions here https://docs.microsoft.com/en-us/azure/blockchain/templates/ethereum-poa-deployment#...
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2answers
150 views

Transaction ordering in proof of authority

In decentralized computation the order of transactions is a big deal. For many smart contracts, the sooner a transaction is called, the bigger benefits for that transaction. In proof of work, ...
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68 views

What happens if a Rinkeby node makes a bad block?

On the geth Rinkeby testnet, how does the rest of the testnet respond if a Rinkeby node makes a bad block, or a block that contains: No transactions Transactions that may have been included in a ...
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1answer
225 views

how to setup hybrid PoW+PoS or PoA private network (geth)

I am aware about PoW and PoA setups of ethereum private networks but would like to know if anyone could help or point me the direction how to build a hybrid PoW + PoS or PoW + PoA ethereum based ...
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1answer
627 views

How well do Proof of Authority (PoA) implementations of Geth (Clique) and Parity (Aura) scale?

Has anybody tried to run PoA networks with 100 or more validators? Given a fixed block size, how did the number of validators effect transaction throughput and latency?
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Unable to Add 3rd Proof-of-Authority Sealer Node

I have a geth POA private blockchain setup and running with 2 sealer nodes. Now I have setup a 3rd node as a sealer, and ran the following command on the both existing sealer nodes clique.propose("...
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1answer
2k views

Difference between Geth POA Clique and Parity POA Aura

I am creating my own private blockchain with a POA consensus. What is the difference between POA networks created by Geth (Clique) and by Parity (Aura), and are there scenarios that favor one over the ...
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34 views

How Do Accounts Generate Ether After Genesis Creation?

How is new ether created in a private proof-of-authority network? I understand when creating a genesis file you can specifically allocate funds to an account, but what about after the network has been ...
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1answer
124 views

Trouble executing transactions on a private PoA network with blocktime set to 0

I'm trying to run a private PoA(Proof of Authority) network with the blockTime (clique.period in the gensis block) set to 0. I'm testing a truffle contract against this network, and when executing ...
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2answers
67 views

Where authorities in PoA are stored?

I am trying to deploy a private ethereum network in my machine using Proof-Of-Authority and geth client. I followed this tutorial but I can't realize where the information about authorities are ...
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1answer
713 views

Is it logical to use “Proof-of-Authority” for a “public” blockchain?

According parity.io website: Proof-of-Authority is a replacement for Proof-of-Work, which can be used for private chain setups. And also: The chain has to be signed off by the majority of ...
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0answers
65 views

Who Execute Transaction in PoA

In PoW, every full-nodes executes contracts of a block to confirm that the miner was doing honest work. What about in PoA (proof-of-Authority)? a. Only authorities will execute the contracts to ...
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0answers
266 views

Calculate Private Proof-of-Authority TPS [duplicate]

With a private Ethereum Proof-of-Authority network set up containing 3 sealer nodes, what can we do to estimate the TPS (Transactions per second) of the POA network?
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1answer
191 views

Proof of authority reward mechanism

Can anybody explain the reward mechanism in Proof of Authority (PoA) protocol? What kind of reward is received by the validators in PoA? So far I came up with the following points: There is no ...
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2answers
195 views

What happens if a block signer goes offline on Rinkeby?

Rinkeby relies on a sequence of trusted signers to add blocks to its test chain. What happens if one of these block signers goes offline? How long is the next node in the list supposed to wait before ...
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2answers
147 views

How to solve clique is not defined error?

I have going a PoA network, and everything looks like it works. But I cannot get clique to show up in geth. > clique ReferenceError: 'clique' is not defined at <anonymous>:1:1 Has ...
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2answers
3k views

QuorumChain Consensus vs Raft Consensus vs Istanbul consensus quorum

I am reading about Quorum which is an Ethereum-based distributed ledger protocol with transaction/contract privacy and new consensus mechanisms. I have read about QuorumChain consensus and Raft ...
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1answer
767 views

Is Quorum production ready

Quorum is private permissioned blockchain network.Is it production ready or still in beta/Proof of Concept stage?
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236 views

Is there any anonymity in Proof-of-Authority?

According to the following article, Proof_of_Authority (PoA) is a modified form of Proof_of_stake (PoS) where instead of stake with the monetary value, a validator’s identity performs the role ...
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1answer
967 views

Proof Of Authority vs Proof Of Work geth

In case of proof of work consensus mechanism miners compete with each other to solve the cryptographic puzzle and once a miner found the answer of puzzle , he will broadcast it to all the nodes ...
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1answer
90 views

Add new sealers in aura network without hard-fork?

I've set up a private PoA (aura) network using parity-deploy and was wondering how it's possible to add/remove authorised nodes without doing a hard-fork of the network. I've heard about people ...
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1answer
107 views

Can a PoA Network be corrupted by one node only?

https://github.com/ethereum/EIPs/issues/225 The text from that link states that a single node can corrupt the blocks and is limited to just a signing limit. What is the solution to prevent a node ...
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2answers
289 views

Does a PoA network use gas?

I understand PoW uses gas to counter a DDoS attack. What about PoA? Is gas also used in PoA networks?
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1answer
114 views

Can clique.propose be automated in a smart contract?

I know that clique.propose can be manually entered into geth and then all other nodes to finally add a new node. Is there a way to automate this for example using a smart contract? Then the proposal ...
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1answer
97 views

Securing --rpcaddr endpoint on Go Ethereum node

I have been connecting nodes to a PoA blockchain based server and the only way I could get it to work was to specify the server address in the geth connection string as follows - --rpcaddr xx.xxx....
3
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1answer
343 views

Are all nodes 'mining' nodes in a PoA network?

I now have my PoA network running and I can add nodes which are approved by the others. But I have a question about can we add read only nodes? I do not really understand the different types of nodes ...
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1answer
513 views

When is a clique.proposal known to other nodes?

I do not really understand how a proposal is communicated to the other nodes. I have 5 nodes in a PoA private ethereum network. I am trying to add 2 nodes on another server. I get this - instance: ...
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1answer
275 views

How many bootnodes should be used in a PoA Network?

I implemented a PoA network as per this example, and it states: If N sealers are defined in the genesis file, clique will only work if int(N/2+1) (source code) nodes are online. This means that ...
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1answer
734 views

What are sealer and signer nodes in PoA networks?

I have googled this and although the terms are widely used I cannot find a definition for them. Does anyone have a definition for these terms?
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1answer
2k views

How can we add new nodes under PoA?

I implemented a PoA system successfully. But after the initial setup (eg two nodes), how are new nodes added? I understand that the acceptance of a new node is a voting process but I am not certain ...
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1answer
211 views

Rinkeby Transactions not getting mined

I am trying to send transaction to a contract, but my transactions is not getting mined. For troubleshooting, I tried various gas prices, with same nonce: 25 wei (0.000000025 Gwei) 22 wei (0....
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1answer
413 views

Rinkeby failure with web3.py — Could not format value '0x…' as field 'extraData'

I am trying to connect to Rinkeby using web3.py. But when I call a method, like w3.version.node, it throws an exception ending in: ... File "/home/hacker/venv/lib/python3.5/site-packages/web3/utils/...