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Questions tagged [poa]

POA stands for proof of authority . This tag will be used for question related to POA/POA network

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Estimate gas limit without eth_estimateGas method

POA Network (Ethereum Like) blockchain has eth_estimateGas to estimate gas limit but this method does not work in POA Network Sokol (Testnet) blockchain. When i call this method it gives response: { ...
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1answer
7 views

POA chain: intrinsic gas too low, contract deployment

I'm trying to deploy my smart contract to a private proof of authority chain with geth, but i always get the following error message intrinsic gas too low This is the JSON RPC request i'm sending. ...
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0answers
26 views

How to prevent DDOS in ethereum using PoA?

Using clique, how to prevent DDOS attack? Is there a way to set a whitelist of nodes which can send transactions, and blacklist all the others?
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23 views

Transactions always fails on POA sokol testnet blockchain

POA Sokol is a ethereum like testnet blockchain. I am using ether.js to make a contract call . The eth_estimateGas method in testnet gives this response but works in mainet: { "jsonrpc": "2.0", ...
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2answers
32 views

How to backup POA based ethereum private blockchain and restore it in a fresh new environment

Is there a way to backup the POA based ethereum private block-chain [created from microsoft azure POA template] and also restore it in a all new environment with out loosing any transactions & ...
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1answer
23 views

Configuring a new ethereum network, using geth and PoA as consensus

I am trying to create a PoA private network using geth but I didn't find a good guide lines especially with the PoA addition. I couldn't get a definition and examples of the genesis block ...
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1answer
88 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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0answers
101 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. ...
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0answers
23 views

PoA throughput with multiple nodes

Will it be faster for my system, in terms of number of transactions per second, if my network has a lot of nodes? Does the number of nodes in PoA is related to the throughput? Particularly I am ...
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0answers
124 views

Deploy Contract with truffle on Private Network using Parity

First I followed this demo PoA tutorial to build a private PoA network using Parity. Then I wanted to use truffle to compile and deploy a smart contract. I tested the deployment using ganache test ...
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1answer
38 views

Parity PoA step duration

I’m setting up a private blockchain using parity. I need to use PoA consensus with the maximum throughput possible. What do you recommend to set the stepDuration value to? Can we set it to a very low ...
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1answer
98 views

How to configure the sealer account for a private Clique PoA network in Pantheon

Pantheon is the new Java-based Ethereum node targeting the enterprise setups. I am trying to get my geth clique private network running on pantheon, but since pantheon has no account management, I am ...
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65 views

Setup Parity PoA network compatible with truffle framework deployment mechanizm

The question from the title kind of wraps around the real problem but it is actually what I'm having trouble making work. I'm trying to setup production PoA network so using all the flags made for ...
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2answers
57 views

Can we use Proof of Authority on private mainnet?

I am trying to figure out a way to use consensus algorithm on a private blockchain network, preferably ethereum. came across many suggestions. One of the suggestions which stuck was using PoA on ...
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1answer
85 views

Try running MyCrypto with my local parity nodes?

i want connect my local parity nodes with Mycrypto i flowed this tutorial to built my two nodes https://wiki.parity.io/Demo-PoA-tutorial.html than i try to flow this tutorial to connect it to Mycrypto ...
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2answers
93 views

Proof of Authority or PBFT

I want to choose a consensus algorithm for permissioned blockchain in healthcare. I know PoA and PBFT are good choices, but I want to know which one is better? Thanks...
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1answer
129 views

What number of confirmations is considered secure for Geth PoA Clique?

In Ethereum PoW the recommendation is to wait for 12 confirmations at least. [Q]: What rules to apply for Geth PoA Clique algorithm? My best guess so far: lower limit: sum of confirmation block ...
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1answer
33 views

Validator stuck in Pending State

I am working with a kovan validator set for a POA network. When I try to add validator, I make the Initiate Change call and it goes through. Validator goes to pending state. When I make the Finalize ...
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1answer
84 views

Geth PoA Clique and Chain Forks

In PoW, in the case of a chain fork, the client will continue on the chain with the most work on it. In Geth PoA Clique, forks still can ocur, since Sealers are racing against each other in sealing ...
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2answers
187 views

Geth PoA Clique and 100% transaction finality

In Bitcoin and Ethereum PoW, we have probabilistic BFT. I.e., the transaction finality will never reach 100%, but it will be very close to that with every further confirmation. How about Geth POA ...
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0answers
31 views

go-ethereum POA with clique - issue with add new signers when all old signers are removed

I have setup a POA network with Clique consensus on azure. Due to some issue all the signer vms got deleted and we have no more signers and only normal geth nodes. So i tried updating the geth nodes ...
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0answers
86 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("...
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0answers
109 views

geth keeps quitting

I am running a geth node in a docker container for a POA private blockchain. The version of geth is Geth/v1.8.14-unstable-35fcd2f4/linux-amd64/go1.10.3. It is started using the command --networkid ...
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0answers
27 views

PoA (like rinkeby) safer to generate random number (RNG) this function than POW/POS?

How can I securely generate a random number in my smart contract? I heard that a block of random function results can be dropped by a malicious miner. Can POA prevent this?
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1answer
109 views

What is the purpose of non-mining sealer nodes in clique POA private ethereum network with respect to the clique consensus

I did setup a private POA ethereum network with 4 nodes with 3 of them mining . I went on to try a lot of combinations with some miners and sealers and reached to a conclusion that every miner hash to ...
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1answer
88 views

Can race conditions occur in PoA network?

I have the following contract deployed on my PoA network with two sealers, node1 and node2. Let's assume a user, user1, submits a transaction with call to process() method to node1 and another user, ...
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1answer
234 views

How to immediately include transactions into blocks if there is still space?

Geth version: 1.8.12-stable OS & Version: Linux/OSX Expected Behavior Transactions to distributed to network right at its sent block number and deployed within that. Actual Behavior ...
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0answers
150 views

Error encountered during contract execution [Reverted]

i have created this contract https://etherscan.io/address/0xfecf0e91a193e8511ac83d8effda34ae4278f491#code but the problem is when i try to contribute to crowdsale it showing an error, (Error ...
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1answer
30 views

Warning! Error encountered during contract execution [Reverted please someone help me with this

i attached link code on etherscan. and error code also error: https://etherscan.io/tx/0x90d0d39a127e0693066cbc9a8a42fab20250753ead52724ab1760d7b4b458009 code: https://etherscan.io/address/...
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1answer
174 views

“invalid sender” error with web3 on a PoA private net

I am using web3 to sign the following transaction and send it to a node using sendSignedTransaction. However I keep getting "invalid sender" error. I have set the network id to 6454 in genesis.json ...
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0answers
116 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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220 views

Best Method to Increase TPS on PoA Blockchain

In creating a PoA blockchain where a high TPS is needed, how will you define the genesis.json configuration? There will be sealer nodes on opposite ends of the globe with ~ 0.1-0.2 second latency. ...
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123 views

Private POA Ethereum network could not sign transaction

I setup a private POA ethereum network, Here are info about it : one bootnode in 43.247.91.xxx, all ethereum nodes use it as bootnode. 3 signer nodes(named A,B,C), A hosts in 43.247.91.xxx, B hosts ...
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1answer
301 views

Storing structured data in private blockchain

The task. Develop distributed registry on blockchain network that can store public data of the certain objects. For example: { "id": 123456789012345, "title": "Big black box (not more than 100 ...
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1answer
302 views

Help with setting up Private POA(Clique) Ethereum Network

Geth Version : 1.8.12-stable-37685930 Testing on Amazon EC2 t2.large(8GB RAM) machine with Ubuntu 16.04 running. I am in need of setting up a multi node private POA(Clique) ethereum network. ...
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0answers
115 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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1answer
177 views

What is the correct truffle configuration to deploy DApp to the POA test network?

I am currently struggling to deploy my DApp to the POA testnet (https://sokol.poa.network). I have a working DApp that I deployed to my local Ethereum testnet using truffle compile and truffle ...
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0answers
90 views

Getting sealers in POA

how to get sealers in Proof of authority network through solidity contract, like inside a contract ?
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0answers
145 views

How to set gas price for an OPCODE in a private PoA chain?

I have set up a private PoA network on my machine. I can set the gas price and gas limit for all transactions. Is it possible to set gas price required to sign a transaction for each OPCODE? Like I ...
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1answer
28 views

Function call always as last function call in current Block

I'm implementing a DoubleAuction and I want to call the breakEven function, that finds the market clearing price, always as very last function in the current Block. Is there any way that I can check ...
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0answers
37 views

Load balancer for ethereum PoA private node

I'm having 3 PoA node peered to each other using bootnode. I want to configure a load balancer for all the 3 node so all my traffic will come to load balancer first and then my request is provided to ...
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1answer
134 views

How to filter transactions in PoA/Clique chain

(ETH noob here) I am thinking of running PoA/Clique based network for a potential dApp project. Is it possible for the sealer to apply filters on transactions before sealing a block? The scenario ...
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3answers
421 views

How to mint coins on a private PoA network?

I have a PoA network and the balance went to zero after testing. How can I mint new coins? I know the genesis file can define a balance, and also under PoW the miner rewards the account. But under ...
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0answers
52 views

What is a genesis block mismatch (when just one genesis.json exists)?

I am testing a PoA Ethereum network and there are messages in the logs which are not really exaplainable - EBUG[06-03|01:37:09] Ethereum handshake failed id=02d1d9b6c3c90d9e conn=inbound err="...
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2answers
83 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
134 views

What is the bucket list in geth?

I get the error below when starting my PoA network. I have no idea what defines a bucket list. Has anyone more details? DEBUG[06-01|10:58:47] Found seed node in database id=ed8b3be93192299f addr=...
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202 views

how to get clique.propose working with geth and PoA?

I have a network running across 6 nodes and several servers. But the clique.propose does not always work properly. I am unsure why that is. Here is my geth output showing my request is queued but ...
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1answer
294 views

Ethereum Clique RPC Call | web3.clique undefined issue

To access the functionality of Clique through geth javascript console is easy, like clique.getSnapshot(), clique.propose("address",bool) etc. But I'm not able to access those functionality using RPC ...
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1answer
144 views

How to test and bechmark POA consensus? [closed]

How test POA consusus that only authorized sealer can seal the block. How to run test cases ?
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1answer
63 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 ...