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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14 views

What could be the problem if there is only one sealer in private network with PoA Consensus?

I have a private network created using geth and I want to use it as a decentralized database. Currently, I'm testing the network using 3 nodes which one of the nodes as a validator (hence only one ...
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8 views

Is any account allowed to deploy a SC on a POA network?

I'm pretty new to ethereum but I have a geth POA network running, consisting of two nodes, one boot node and one public node. The thing is that the only way that I have to deploy a SC is using one of ...
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26 views

Geth POA network: How to create and approve a fake transaction using 100% authority on sealer nodes?

Assume a 2-node local POA network. Having full authority on both nodes, is it possible to execute a 51% attack by approving a fake transaction without the sender's private key? For example, let's say ...
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31 views

Vyper Smart Contract deployment using web3.py, Clique PoA

I am new to Blockchain Dapp development so bear with me if I sound a bit out of court. Coming from a Python background, I am trying to use web3.py to create, deploy and interact with vyper ^0.2.0 ...
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1answer
78 views

Does Geth Clique will get affected when difficulty increases to its maximum?

I have started own private network with clique consensus algorithm in GETH. Regardless of miners now sealer will do the job and I have period:5. Difficulty is set 0 initially but over time it is going ...
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10 views

what are the phases of PoA?

do the authorized nodes check the public key or the signature of each transaction in the beginning and how long it would take as the PoA is lightweight consensus
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29 views

How do you hard-fork a Clique PoA chain to use new validators?

Imagine you've got a running PoA chain using Clique PoA with Geth. If everything is running normally, you can propose additions and removals of validators and the existing validators will vote on the ...
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53 views

POA - Always pending transaction in txPool

Always when I send transactions (I tried several accounts) it gets stack in the txpool (pending) so they are not mined, I am using POA, I checked gas and nonce and they are good. What are the possible ...
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1answer
39 views

Remove ether from PoA private network

I try to setup a private network containing three nodes (bootnode, sealer, transaction node with rpc) and PoA. So far so good. The thing is I don't want to have any ether nor do I want to pay any gas ...
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58 views

Private Ethereum PoA error: "out of memory"

I'm working with multi node setup on Ethereum private chain PoA. We have all three validator nodes. blockchain ├── genesis.json ├── node1 │ ├── geth │ ├── keystore │ ├── ...
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59 views

How to provide balance to validator nodes after blockchain creation private blockchain POA

I'm working with a private Ethereum blockchain PoA with three validator nodes. I have initially added three wallet addresses to get some free ethers. However, when I checked the balance of one of the ...
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17 views

can a running blockchain fork from PoW to PoA?

can a running public blockchain hard fork from PoW to PoA?
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1answer
159 views

Geth v1.9.24 - POA - no sealing with period 0 - "Sealing paused, waiting for transactions"

I have a private clique network with geth v1.9.24. 1 sealer and 1 node. With period=0 there is no sealing happening, all transactions go to txpool as pending, and logs show "Sealing paused, ...
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85 views

How to identify why my transaction goes to pool, and how to process them?

I'm working with POA blockchain with three nodes. When I send transaction using geth console, sometimes my transaction goes to txpool and never clear from there. Is there any way using that we can see ...
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43 views

Geth-Clique PoA

In the PoA consensus algorithm Clique, when a sealer broadcasts a block for a given height of the blockchain, do the other sealers check the validity of the transactions inside the received sealed ...
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13 views

Geth Puppeth set Seaing Profit to 0

I am creating a private blockchain network using GoEthereum. I am using Clique (to get the PoA protocol). Since I have predefined sealers/miners, I do not want to set any mining profit for them. But ...
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63 views

Private PoA deployment leads to 'invalid gas used' error

I'm trying to deploy a contract to a private clique chain running on two devices (laptop and raspi). Deploying the contract when running multiple nodes on a single device worked fine as per usual, ...
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1answer
258 views

Geth keeps changing coinbase / miner account and stops working. (POA Network)

I have set up a Geth POA network of 2 nodes on different cloud instances. Network was running good for 2 months but now suddenly it's getting connections from unknown peers and mining stops working. ...
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61 views

Geth network stopped mining

On my POA network there are 5 nodes/miners but suddenly all nodes stopped mining and giving this in console "INFO [09-05|08:50:16.267] Looking for peers peercount=4 tried=4 static=0". We ...
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1answer
271 views

POA: Geth node (miner) automatically stops after 3-4 hours which results in primary node pausing and looking for peers

I have set up 2 Geth nodes with POA on different machines. After starting bootnode and starting Geth nodes, they sync well and starts mining alternately. If I manually stop a node, other node keeps ...
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1answer
131 views

geth mining not working without --allow-insecure-unlock (geth 1.9.16-stable-ea3b00ad)

I am running a private ethereum blockchain with POA geth --port 3000 --networkid 42 --datadir=./blkchain --maxpeers=5 --rpc --rpcport 8543 --rpcaddr 127.0.0.1 --rpccorsdomain "*" --rpcapi &...
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1answer
45 views

Why array.pop() doesn't work on my private network?

I have deployed a PoA network using Hyperledger Besu and I'm using Remix in order to code a very simple smart contract. Here is the smart contract code: // SPDX-License-Identifier: MIT pragma solidity ...
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0answers
13 views

Cannot connect to Azure PoA Websocket

Just like question Connecting to blockchain on azure using web3.js and websocket, I need to use websockets to capture events. I have gotten my http and websocket endpoints from the deployment outputs ...
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1answer
72 views

How to add member NOT peer node to private ethereum network

I followed this parity-poa tutorial to build a private POA ethereum network in local. I want to add member node to this network . so i run parity client with below configuration toml file: [parity] ...
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1answer
43 views

Geth Providing error on its directory path

I have initilize my node1 with my genesis file which worked fine command is 'geth --datadir node1/ init genesis.json'. But with same geth when I try to run this command geth --datadir node1/ --...
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1answer
90 views

PoA network confusion resolving using geth

I am planning to move from PoW to PoA consensus (clique) using geth. But I am confused of some of the topics - 1) Empty blocks are created periodically? What is the size of an empty block? 2) Is it ...
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1answer
59 views

geth clique block gas limit

I have setup new PoA network with default block gas limit to 3 billions. The network starts with configured limit. However, overtime the block gas limit reduce down to 8 millions. Is there a way to ...
2
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1answer
544 views

bootstrap node vs cmd/bootnode

I am using bootnode as a starting/meeting point for my private POA/clique network. When I start it since one of the latest versions it says: fmt.Println("Note: you're using cmd/bootnode, a developer ...
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0answers
53 views

Migration from PoW to PoA Clique on geth

After reading chapter "Repurposing header fields for signing and voting" at https://eips.ethereum.org/EIPS/eip-225 I've understood the nonce field of blocks in PoW consensus blockchain is reused for ...
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0answers
27 views

burning or collecting transaction fees on PoA

In Parity PoA, how would you burn or divert all transaction fees to a predefined contract? Would it be easier in another PoA chain?
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0answers
32 views

Calculated blockhash of PoA block mismatches with actual blockhash returned by RPC

I set up a Demo PoA chain using Parity Etheruem. I sent some transactions to it and it started producing blocks. A block on my demo PoA chain was generated with block hash ...
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1answer
331 views

raw transactions to send ERC20 token fails on private network(POA)

I am trying to transfer ERC20 tokens on private ethereum network(POA) Transaction flow: raw tx object creation on backend. { "gasLimit": 37000, "gasPrice": 4000000000, "...
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4answers
8k views

Gas estimation failed - remix

I am trying to figure out what is wrong with the following code as it does deploy successfully on remix. pragma solidity ^0.5.11; contract MyContract { // Storage address contractOwner; ...
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1answer
147 views

Blocktime zero (period:0) with clique in permissioned blockchain

I am considering to set the blocktime to zero (clique.period:0) in a permissioned private blockchain with known but untrusted nodes. The reason to do this is having a minimum transaction process ...
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1answer
77 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 ...
2
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2answers
473 views

Cannot deploy new contracts with pending transactions (Ropsten)

I have a very strange and annoying problem. I am trying to deploy a new contract however it just keeps cycling. I have the same problem on the POA testnet and on Ropsten. Please see below: I have ...
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2answers
1k views

Geth-Clique: 2 sealer POA network - sealer nodes not mining - Signed recently, must wait for others - stuck

I have the following setup for a geth clique POA network, however blocks are not mined. The network consists of two separated nodes which are both acting as an active sealer. Sealer 1 Start Command ...
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0answers
117 views

Making difficulty static - Geth

I made a setup for a private PoA network with geth. Everything works fine, regarding mining, making transactions, connecting through http and websockets. Now I need to optimize transaction time, I ...
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1answer
111 views

Is it possible to deploy the ERC721 token on private network for free?

I created a private network with 3 instances (one controller, 2 nodes) based on PoA on AWS. And I checked if my custom ERC721token is deployable by using Ropspan test network. so I have a working-...
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1answer
50 views

How does Enterprise Ethereum manage authentication?

I`m sorry for my bad english. I am struggling between enterprise ethereum and hyperledger fabric. I saw in the docs that Hyperledger fabric manages parts of certification and accreditation. How is ...
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0answers
93 views

Does uncle blocks in poa forks contains transactions?

Since that forks can happen in poa networks (I asked how to prevent forks here); What does means ? is uncle blocks contains transactions or they are just empty blocks ?
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43 views

What is 'dangling vote' in the geth clique POA algorithm?

I am reading the code implementation for clique POA algorithm(consensus/clique), and encountered this line of comment in consensus/clique/snapshot.go: // uncast removes a previously cast vote from ...
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1answer
95 views

How to prevent fork in poa network?

I discover that forks in poa network can happen! I have 4 nodes (trusted nodes) I want to create a poa network with no forks, is it possible ?
3
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1answer
97 views

How use SSL between geth nodes communication?

I have a poa network contains 4 nodes, I want to secure the communication between those nodes, is it possible using SSL and reverse proxy ?
3
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0answers
49 views

What is the scalability limit for POA Ethereum (number of nodes)?

Tried to find any benchmarks what is the maximum number of nodes for Ethereum PoA network. When does a network latency become crucial? Looking for any sources / empirical benchmarks.
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1answer
214 views

Parity POA Smart Contract Method Always Fails

I have set up a private POA Network according to the tutorial from the parity homepage. I have two nodes running on localhost:8540 and localhost:8541. I have connected MetaMask to my first node and am ...
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0answers
44 views

Send transactions from any address (account) to a private ethreum network (PoA)

I am trying to send a transaction to a private Ethereum network (PoA) using an arbitrary address. However, the network is not accepting transactions from that address. Are there any method to unlock ...
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1answer
37 views

Accounts with ether cannot execute transaction on private chain

According to Metamask my accounts have ether, one account can submit transactions and have them be executed by the network, the other two have their transactions left as Submitted transaction. Note, ...
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3answers
97 views

What would be optimal number of block confirmation for Ethereum PoA network?

There are answers related to the number of confirmations is considered secure in Ethereum. @Waqar Lim To sum up, it always depends on your application and the attached value to consider which ...
3
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0answers
539 views

Header broke chain ancestry, Synchronisation failed, dropping peer & retrieved hash chain is invalid

System information Geth version: Geth Version: 1.8.22-stable Git Commit: 7fa3509e2eaf1a4ebc12344590e5699406690f15 Architecture: arm Protocol Versions: [63 62] Network Id: 1 Go Version: go1.11.5 ...