Questions tagged [proof-of-authority]

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1answer
112 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
176 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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1answer
221 views

dynamic Node Membership management in Ethereum Blockchain

I am a new bee in Ethereum Blockchain in implementing this as a potential solution for decentralized application. In the process of identifying the solution i have came across a problem where what if ...
2
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1answer
445 views

Mining pattern on PoA

I've setup a small network with two nodes using authorityRound engine (parity). My question is about the mining. If I have two validators (A and B), who will mining the blocks? the node A or B? I ask ...
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1answer
572 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: ...
2
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1answer
598 views

How to connecting the nodes when Parity starting

I follow this tutorial to run the PoA demo on Parity. And when I try to connect the nodes. I found that should do everytime after Parity started. Can I connect them when I starting Parity? I found ...
2
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1answer
209 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 ...
0
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1answer
30 views

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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2answers
72 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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4answers
1k views

Bootnode command not found

Working on this blog Tried to initialize bootnode throws and error
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0answers
64 views

Invalid transaction v,r,s values while deploying contract on POA network

I'm trying to create a private POA network. I've generated Genesis file using Puppeth. Then while deploying Smart Contract on Remix using the accounts created, I'm getting the following error: ...
2
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1answer
62 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 ...
1
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1answer
117 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....
2
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1answer
102 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 ...
22
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3answers
6k views

How to add new Sealer in Geth 1.6 Proof of Authority?

Hi there Ethereum experts, I'm trying out Proof-of-Authority in Geth 1.6 for my private network and got it to work on a few nodes using Puppeth. Now, I have two questions about maintain the private ...
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1answer
83 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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0answers
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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0answers
21 views

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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0answers
65 views

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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0answers
13 views

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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0answers
30 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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0answers
38 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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1answer
1k views

How does the Clique PoA consensus protocol choose the next block-minting node?

How does the Clique PoA consensus protocol choose the next minting/mining node? Is it random (within the bounds of the number of blocks that must be elapsed before a node can mint/mine another block)? ...
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2answers
387 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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3answers
2k views

Ethereum POA ( proof of Authority ) for private network

I am trying to set up private network in ethereum with POA, but I am unable to do so. getting below error I have tried using puppeth manager to setup the genesis file. The genesis file is set up to ...
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2answers
1k views

Private PoA Network doesn't mine

I have 5 (8GB/4vCPU) droplets (private networking enabled; IP's below are of this private network) running on DigitalOcean. I am startled because the workflow I outline below worked like charm locally....
3
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1answer
129 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 ...
4
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0answers
261 views

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("...
3
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2answers
225 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 ...
3
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1answer
829 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
153 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 ...
14
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2answers
4k 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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0answers
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 ...
2
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2answers
164 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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2answers
186 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#...
2
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1answer
264 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 ...
2
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0answers
382 views

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. ...
2
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2answers
233 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 ...
2
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1answer
242 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 ...
2
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0answers
125 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
203 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 ...
0
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1answer
254 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
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 ...
2
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1answer
767 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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4answers
1k views

How to add more authority nodes in Private chain Proof of Authority

Scenario: I am running a private chain having some authority nodes. The entire network is running fine. Question How should I add more authority nodes in the network. Other than the ones defined in ...
6
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1answer
715 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?
2
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1answer
1k views

How to get into a PoA (private) chain?

I followed this tutorial to set up a private chain with PoA some days ago. And I run a PoA chain successfully. But today I restart my server. And I can't start (or get into?) the PoA chain which I set ...
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0answers
35 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
154 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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0answers
70 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 ...