All Questions
912 questions
1
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0
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774
views
Why don't we have an EVM integration library written in C++?
We have web3.js for JavaScript, web3j for Java and NEthereum for Unity/.NET.
I want to develop with Unreal Engine (C++) a game that runs on Polygon, but there's no integration library in C++.
Should I ...
- 11
0
votes
0
answers
35
views
Old eth network accounts do not appear after reinstalling metamask
I have a serious problem.
I switched from Note and in the new Note I restored Metamask using my phrases.
The installation worked.
Inside the Metamask of the old note I had the ETH network with two ...
- 1
0
votes
1
answer
30
views
I transfered ERC-20 token to the wrong Efinity address [duplicate]
I transfered ERC-20 token to the wrong Efinity(NFT blockchain on Polkadot) address,how to get it back? Someone plz let me know
0
votes
1
answer
79
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 ...
- 229
1
vote
0
answers
420
views
tx fee exceeds the configured cap while deploying in contracts in private network in geth
While deploying my contracts over private network which is configured in geth I am getting the following warnings. It seems suspicious to me as if some intruder is trying to breach the network. I ...
- 419
1
vote
1
answer
893
views
Is there Blocks Pruning in ethereum clients specialy geth? (and other questions)
Is there Blocks pruning in ethereum clients such as geth and how does that work?
by pruning I meant, does the blocks information whether stored in DB like in cpp-ethereum are deleted if the ...
- 173
1
vote
0
answers
51
views
questions on block (and header) storage in ethereum, how is it stored along with tries?
I understand that ethereum uses Trie to track the state, transactions, receipts. and each trie has key-value pair that is stored in the database.
Each blockheader also has the root has of stateRoot, ...
- 173
14
votes
3
answers
22k
views
Error "Snapshot extension registration failed" when connecting nodes
Description.
The error occurred during the process of building an Ethernet private chain, and I found that the node could not connect. The error message in the log is as follows.
INFO [07-24|09:06:36....
- 141
2
votes
0
answers
62
views
Why does Ethereum use RLPx over TLS?
Ethereum encrypts data sent between peers. What are the reasons for implementing RLPx over TLS?
- 21
2
votes
0
answers
112
views
What is Ethereum's protocol stack regarding cryptography?
Resource 1 says that “There is no encryption as part of the Ethereum protocol—all messages that are sent as part of the operation of the Ethereum network can (necessarily) be read by everyone. As such,...
- 21
0
votes
1
answer
2k
views
How get private key from eth address public key/address
By mistake I send "TRU" erc20 token in a ether address and can't access it now. I have only eth address and public key of this address. How to get private key from eth address or using ...
1
vote
0
answers
64
views
admin.addPeer() takes a very long time to add the peer
I am running a private network where nodes add and remove each other dynamically.
I have a problem where, the first time a node performs admin.addPeer() to a neighbor the peering is instant (as ...
- 43
0
votes
1
answer
229
views
How to securely send a message
I was wondering that can I encrypt a string, send it to a smart contract, for that to be decrypted only by some address's private key?
e.g "Hello" to be encrypted in a way that it would be ...
- 67
1
vote
0
answers
123
views
Experimental data on transaction propagation time
Does anyone have empirical data on how long does it take to propogate a transaction thought out most of blockchain?
I know we can speculate on how long it would take (like here). But I am interested ...
- 123
1
vote
1
answer
322
views
Not able to use --testnet flag on geth windows
I have a problem where if put
geth --testnet removedb
it says
flag provided but not defined: -testnet
Im on windows 10 x64. Thanks in advance!
- 21
1
vote
0
answers
257
views
Listening to smart contract events RPC, using web3, on aleth node
bakcground,
I am working on an ethereum based fork of cpp-ethereum/aleth node and not using the official golang client (geth), unfortunately from what I read, websocket support has been 'ditched' in ...
- 21
4
votes
1
answer
4k
views
Web3: Get token address from pair address
I am studying all listed pairs on Pancakeswap. I get the pair address from
PCS_FACTORY_ADDRESS="0xca143ce32fe78f1f7019d7d551a6402fc5350c73"
PCS_FACTORY_ADDRESS = Web3.toChecksumAddress(...
- 41
3
votes
0
answers
494
views
admin.peers shows peer info (local and public ip). Is this cause for concern?
I'm connecting to a private blockchain network over the internet using geth.
In the console of geth if you run admin.peers it lists both:
local_address(internal ip)
remote_address(external ip)
I have ...
1
vote
0
answers
55
views
I'm running a private Ethereum network, how to properly share my enode address with my friends?
I have setup a private network and I'm looking for advice on a few things.
According to the official guide I can use Tor onion addresses.
My question is how do I share this address properly? I have ...
- 45
2
votes
1
answer
859
views
Is it possible to change the network id in GETH once geth is initialized?
I want to change the network_id of my private ethereum network setup with geth. It seems like I have to change it in genesis.json file and also have that id when I start geth.
But, to apply the ...
- 419
0
votes
0
answers
12
views
ETH sent to contract address, how to get it back? [duplicate]
Instead of transferring my ETH token to my wallet, I accidentally sent it to some contract address, this one: 0xE592427A0AEce92De3Edee1F18E0157C05861564.
Is there any way to get my ETH back?
0
votes
0
answers
1k
views
Binance Smart Chain Full Node Implementation - geth is not recognized (Error)
I am trying to install Binance network,by following the official link
https://docs.binance.org/smart-chain/developer/fullnode.html
However, while trying to run make geth I find the below error.
...
- 111
0
votes
1
answer
648
views
How to get Ether in private blockchain?
Fast summary: Need a faucet-like funcionality in my private blockchain to give Ether to the newly on-demand created wallets from Android Dapp.
I'm working in a project where I've deployed a totally ...
1
vote
0
answers
196
views
Is it possible to hard fork a private network to Berlin?
I have a Proof-of-Authority private Ethereum network that has Istanbul EVM version and created by clique engine. I have multiple signer nodes that has Geth version: v1.10.1-stable-c2d2f4ed.
"...
- 8,404
1
vote
0
answers
140
views
Storage space geth for private network?
Setup a private network with clique at 15 secs block creation. Started with 3 nodes. Then deployed a smart contract (ERC 721) and send two transactions. After about 2 days idling, and no transactions, ...
- 61
0
votes
1
answer
628
views
How To Verify A Coin Without Original Contract Source Code?
We are new to crypto. A while ago we created a coin (3DOM coin) with 14,000,000,000 units and stored them in our wallet on myetherwallet.com. We would like to deploy the token now but we do not have ...
0
votes
0
answers
1k
views
Run geth looking for peers forever on AWS
I am new on blockchain.. sorry for asking very basic question:
I am running my first geth private node on AWS using ubuntu using this command:
geth --datadir ~/ethdata/ --networkid 12345 --verbosity 3 ...
- 1
2
votes
0
answers
164
views
Running a SPV wallet on Arduino/ESP32?
I want my ESP32 to make transactions and check for the details of blockchain using a secure method. Actually, I want to use make calls to the blockchain instead of relying on a single node. In my ...
- 683
1
vote
1
answer
243
views
Compilation Error while using ChainLink
I am using Remix IDE for my smart contract development. I am using the following import line
import "https://github.com/smartcontractkit/chainlink/blob/develop/evm-contracts/src/v0.6/...
- 13
0
votes
1
answer
133
views
I tried to send eth from Metamask (in balancer) but transfer is looking failed but I loss my eth(90$ around) What I should do?
I tried to send eth from Metamask but transfer is looking failed but I loss my eth(90$ around) What I should do?
1
vote
1
answer
434
views
Simple way to send gasless Transactions
I was wondering if there is a way for a user to pay transaction fees for another user, meaning user A sign the transaction and user B send it to the network and pays the gas fees.
I found a solution ...
- 13
2
votes
0
answers
841
views
Recalculated downloader QoS values & Current full block not old enough
I'm trying to build the private network between two raspberrry Pi3B with Geth.
But when i started the node and entered the javascript console,
it keeps showing the following message, and i don't know ...
- 61
0
votes
1
answer
42
views
pending transaction on eth blockchain
i still waiting from 4h for my transaction. I know de gwei is low but what you think it will be processed.
0xb69c181d38bcd157d07a623b5c1b620e6694644626bc1ed48e984ed089933e86
- 1
1
vote
0
answers
36
views
Ethereum NFT options
I am looking at producing a set of NFT's that are a set of 100, the item does not have an image, but is a token to run through an algorithm, I want them to be limited whole NFT's, not ERC-20s.
I am ...
0
votes
1
answer
112
views
Learning go-ethereum For Custom Chain
Is there a site to find out all about source code go-ethereum? I want to learn fully about the Ethereum blockchain.I want to learn private blockchain to learn more.
- 127
0
votes
1
answer
262
views
Question about pending transactions
I am running loads of transactions in a private POA network, even a few per seconds. The nonces are being managed by a specific service.
The issue I encountered was that one sealer somehow didn't ...
- 143
0
votes
0
answers
20
views
Custom Chain only allow one account to submit smart contracts
Can you lock down a distributed custom chain where only one user account can submit smart contracts? I don't want anyone filling my chain with data unrelated to my dApp
- 73
1
vote
1
answer
2k
views
Storing JSON data in Blockchain is it good idea?
I want to know, that storing JSON data in Blockchain is good idea or we can get some error? Beacuse if we enter all our data in struct we get "InternalCompilerError: Stack too deep, try removing ...
- 11
0
votes
1
answer
175
views
Is their any change to move a wallet from an bnb blockchain to an ethereum blockchain?
I transferred some ethereum to my bnb wallet. Later I found out that this bnb wallet is not on the ethereum platform.
So I send an amount of ETH to an address similar to the address of the bnb wallet (...
- 1
0
votes
1
answer
95
views
A silly question about web3.eth.sign
I'm a beginner and I need to sign the data with metamask，Find the document https://learnblockchain.cn/docs/web3js-0.2x/web3.eth.html#sign
then In the browser's debug desk ，i try run
web3.eth.sign('...
- 1
0
votes
1
answer
236
views
Is it possible to charge extra ETH fee for token transfers? [closed]
Is it possible to accumulate fee amount deducted from transfer transactions in a different address in smart contracts?
Person A transfers tokens to Person B. Let's say the transaction fee is 0.1 ETH, ...
- 1
0
votes
0
answers
1k
views
Fatal: Failed to read genesis file: open genesis.json: permission denied
I try to init private network and run this command:
geth init genesis.json --datadir=ethdata/
Also, I try to run the same with sudo
sudo geth init genesis.json --datadir=ethdata/
But the result is no ...
- 177
0
votes
1
answer
42
views
any 3rd party service that can get all transaction?
3rd party service recommended
have any 3rd party service that can get all transaction of address?
because from my research the web3 cant get the full transaction by account.
- 1
0
votes
0
answers
523
views
Internal Transactions - How to find out the address of the contract that is calling?
i have been Googling for this answer, but i haven`t succeeded.
The scenario is the following: I have two contracts interacting with each other, and I want to make sure that they only respond to each ...
- 29
0
votes
0
answers
43
views
private network impersonation attack
I've set up a 5-node network with 3 validator nodes. I would like to test the integrity of the blockchain by having a non-validator node attempt to validate a new transaction. How can I go about doing ...
- 187
0
votes
1
answer
431
views
Private ethereum network geth admin.addPeer not working
I am trying to make a private ethereum network the only problem I am facing now is when I make multiple nodes on same pc they discover each other but when I tried to connect other pc on different ...
2
votes
0
answers
58
views
Encoding and signing transaction with aleth client [closed]
I am learning aleth client. I want to do two simple steps:
encode json to rlp with ./rlp create [...]
sign this rlp with ./aleth-key sign <ma_rlp>
And I am getting errors in ./aleth-key sign &...
- 101
1
vote
0
answers
102
views
creating and signing transaction
I am looking a way to create signed transaction using c++ libs from aleth. I have this transaction:
{
from: "0025defd0f341b7f673f84b81c8416d58df29045",
to: "...
- 101
7
votes
3
answers
3k
views
Is there any c++ library for signing transactions?
I am working on light wallet in c++, and I am looking for a c++ library for signing transactions. I mean something where i will pass transaction and private key and it will return signed transaction ...
- 101
0
votes
0
answers
43
views
Using two key for displaying data from contract
i can't found any idea how to get data with two keys. One key "address", second key is "IsCollect"
My mapping:
mapping(address => Player) public users;
struct table:
...
- 1