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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7 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
23 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
142 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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31 views

How to limit queued transactions in terms of waiting time and number?

I am trying to limit queued transactions in terms of waiting time (using --txpool.lifetime ) and in terms of number (using --txpool.globalqueue) but nothing works, I am using PoA with geth, I want to ...
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27 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
22 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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1answer
43 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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13 views

bootnode connectivity issue

I am trying to setup POA network and for that I am using bootnode. but I am having difficulty with connection to bootnode. i am using this command gives error. bootnode -nodekey boot.key -verbosity ...
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2answers
59 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
33 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
31 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
29 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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29 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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21 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
47 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 ?
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18 views

How to obtain data from a private PoA Ethereum Network?

I want to fetch data from a private PoA ethereum network running on a local computer. The data will be used for anomaly detection. I need contract interaction data (function calls etc.), to observe ...
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15 views

What are the risks to considered of PoA in production mod [Geth]?

We are using poa clique with period = 0, and we will pass to production soon, so what are the risques to considered in prod mod ? is there a best practices checklist?
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45 views

How Geth classify transaction as local or non-local? txpool validateTx skips gasPrice validation for local transactions

I see geth code skips the validation of the local transactions https://github.com/ethereum/go-ethereum/blob/master/core/tx_pool.go#L528 // Drop non-local transactions under our own minimal accepted ...
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1answer
25 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 ?
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0answers
36 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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29 views

Geth stuck on “Head state missing, repairing chain”

Geth crashed on lack of disk space, and now is stuck on "Head state missing, repairing chain" on a POA chain. Max verbosity doesn't give anything, nothing, nada, and because it has not recovered, ...
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100 views

Facing issue while setting up private ethereum POA :

Which folder to save the genesis specs into? (default = current) Will create clique.json, clique-aleth.json, clique-harmony.json, clique-parity.json genesis.json INFO [06-20|15:29:21.189] Saved ...
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1answer
117 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
26 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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21 views

When enabling Clique consensus, I get status 0x0 Transaction mined but execution failed

When enabling Clique consensus and try to deploy a contract using Remix, I obtain this error; status: 0x0 Transaction mined but execution failed Any idea? FYI, I am creating a private network ...
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0answers
35 views

How to backup and restore txpool data?

I'm using Geth to create a PoA Clique based private blockchain. I'm currently facing this problem and I'm looking for ways to backup and restore txpool data. From the problematic node, this is my ...
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27 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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1answer
23 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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0answers
87 views

Correct way to handle sent signed transaction on ethereum poa network

Hi I’m having issues with sending multiple transactions to an ethereum proof of authority node(network) on azure. To clarify what I mean. I created an api service, using expressjs and node. Its meant ...
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3answers
51 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 ...
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0answers
45 views

PoA chain not processing transaction

I am using Clique and have set period:0 in the genesis.json file. When I migrate --reset there is no problem in sealing new blocks; but, when I submit a transaction from my frontend through metamask, ...
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0answers
100 views

PoA network not mining

I have set up my PoA network using Puppeth, my two nodes are peering. They are receiving transactions, I can tell that since eth.getBlock("pending").transactions.length > 0. eth.mining == true. But ...
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0answers
260 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 ...
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0answers
75 views

Is it possible to set miner reward on Geth clique?

I have a private network set up with ethereum & PoA clique consensus. Using in geth client miner.setEtherbase(eth.coinbase) on miner nodes, doesn't seems to work. Inspecting in block explorer ...
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1answer
125 views

How to set sealers in genesis block extradata for a Clique PoA network?

What is the format of the Clique PoA genesis extradata field to set up the sealers? This is an example: "extraData": "...
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0answers
40 views

Decline a transaction in a PoA network

Is it possible to decline a transaction in a PoA network? Or to say it in other words: Can a sealer decline to put a transaction into a block he is going to mine? I want to prevent transactions to be ...
4
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0answers
118 views

Error trying to synchronize geth clique client after shutdown

I'm working with a private network using geth clique clients. Each time a node shut downs, (after a power cut, or just killing the geth process), if a try to put it to work again, the node can't ...
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0answers
25 views

Clique - too few transaction inside a limited block

i have got the problem that my private node doesn't put all transactions that would be possible inside a block. Concret i am running a private poa node which should have a fixed blocksize. Therefore ...
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0answers
110 views

Difference of parity PoA between Validator Sets and Aura?

It seems there are two PoA consensus algorithms in parity PoA. What is the difference between Validator Sets and Aura?
2
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1answer
317 views

Is gas burned in a PoA network?

I read in another thread that since sealer nodes don't get rewards, the gas spent in the network is burned and doesn't go to anyone. However to limit spam, there needs to be a non-zero gas price. Do ...
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0answers
311 views

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
163 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
102 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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0answers
126 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
102 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 & ...
0
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1answer
46 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
247 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
333 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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0answers
69 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 ...
2
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1answer
174 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 ...