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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What are the risques 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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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
18 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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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 network latency becomes crucial? Looking for any sources / empirical benchmarks.
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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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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
31 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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22 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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16 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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22 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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21 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
20 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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49 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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2answers
24 views

does we need 6 blocks confirmation using ethereum poa network?

when working with poa ethereum network, does we need to wait 6 blocks to be confirmed? I am implmenting a private network, and I want to know if is it possible to has a fork inside the chain
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35 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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45 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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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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55 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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70 views

How to set sealers in extradata genesis block in PoA?

Which is the sintaxis to set up the sealers in extradata field? This is an example: "extraData": "...
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37 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 ...
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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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22 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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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?
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1answer
224 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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158 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
96 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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73 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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97 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
75 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
37 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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184 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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253 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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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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378 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
132 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
149 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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130 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
187 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
160 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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225 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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249 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
65 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
164 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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330 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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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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191 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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202 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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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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175 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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101 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, ...