All Questions
694 questions
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
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
1
answer
383
views
Get smart contract info from transaction
Lets take for example this, we can see that it did not transfer any ether, it interacts with a contract (that's why there's the stamp of the contract creation/execution).
Is there a way to get in go-...
user66883
0
votes
0
answers
343
views
Geth send full account balance and automatically calculate gas price and costs
I'm struggling with transferring 1 ETH to an address using Geth console. I used all sorts of codes and examples I found online, but it all returns "insufficient funds for transfer" or some ...
- 1
1
vote
0
answers
26
views
How to record every transaction forwarded to my node（geth）?
With a geth client,how can i record every transaction forwarded to me by other nodes (hash, node IP, timestamp) ,in the network layer?It does not mean I am the receiver of the transaction.I just want ...
- 33
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 ...
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
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
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
2
votes
1
answer
244
views
Can my backend call a smart contract function to be executed on a certain date?
The architecture of my dapp consists of a backend (metamask + web3.js or web3.js + geth) and a smart contract that offers different services (functions). I want a function on the smart contract to run ...
- 187
2
votes
0
answers
140
views
Why do pending transactions appear to have a 3 hour cycle? (according to Etherscan data)
See: https://etherscan.io/chart/pendingtx
There's clearly a 3 hour periodicity of txn volume.
Now, I'm aware that Geth nodes have a parameter --txpool.lifetime which is set default to 3 hours. But ...
- 116
0
votes
1
answer
2k
views
Manually setting transaction fee when transacting using geth
I am using geth to transfer some ether to another account.
After geth attach to my node, I just do is the following
personal.unlockAccount(eth.accounts[0])
eth.sendTransaction({from:eth.accounts[0], ...
- 173
0
votes
1
answer
240
views
Local node doesn't see that many transactions?
Just to be clear, this is for binance smart chain not eth chain. I'm running a local BSC node and I have a filter for pending transactions and this was working well as of a couple days ago, but for ...
- 111
1
vote
1
answer
77
views
Which component sends a transaction and which component subscribes to an event?
I am working on an ethereum project but I have some doubts. I have a backend that connects to the blockchain via web3.js. To connect to the blockchain I use a geth node.
I understand that the sequence ...
- 83
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
26
views
What happens when you send a non-state-changing transaction to the transaction pool
I understand that there are 2 endpoints for smart contracts. Call() for running view/pure function and SendTransaction() for state-changing transactions. Obviously a state-changing transaction sent to ...
- 171
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
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
249
views
Txpool not executing pending transactions
here is our geth command
screen geth console --rpc --rpcapi "eth,net,web3,debug,personal" --cache 8192 --allow-insecure-unlock --txpool.accountslots 4096 --txpool.accountqueue 4096 --txpool....
- 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
2
answers
246
views
If I want to create a Blockchain Explorer, would be enough just use Infura? Or is it essential to run a full node?
I want to create a Blockchain Explorer and I am wondering if using Infura for that would be enough, or if it would be necessary to run a private node on Ethereum.
I am not sure about Infura speed to ...
- 23
2
votes
1
answer
5k
views
message: 'invalid argument 0: json: cannot unmarshal hex string without 0x prefix into Go struct field SendTxArgs.value of type *hexutil.Big'
I am using a JSON RPC request and source code is as follows:
var options ={
url: "http://127.0.0.1:8545",
method: "POST",
headers: {"Content-Type":"...
- 21
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
-2
votes
1
answer
786
views
Datetime in solidity [closed]
how can i get date time in solidity like that: 14/10/2020 20:50. I don't want 8:50 PM.
I get in timestamp but timestamp not possible convert because I have wrong timestamp.
- 31
0
votes
0
answers
77
views
In Ethereum, is it possible for a malicious client to duplicate a coin by double executing a transaction?
Is it possible a scenario in which a malicious client executes two transactions with the same nonce of a specific account and copies and sends coins?
Suppose users A, B, and C have the following ...
- 3
0
votes
1
answer
2k
views
geth node not seeing pending transactions
I'm running a geth node locally on goerli network in sync mode. I use the following command to boot the node :
geth --goerli --syncmode "light"
My txpool never list pending transactions, ...
1
vote
1
answer
501
views
how miners within a mining pool execute transactions and verify blocks?
I know that solo miners have to select & execute transactions in a block and also verify the recipint block and its transactions, all by themself.
However, I am not sure how this works in a mining ...
- 363
0
votes
0
answers
514
views
nonce too low , please help
please help, I have 1 transaction stuck 7 days, I have sent 1 transaction with 0 ETH and nonce to the same address, to cancel the stuck transaction but all the nonce too low error
- 1
1
vote
0
answers
36
views
Generating blocks without mining,
I have private test network, and I need to simulate forks. Is any possibility to immediately set number block fork-1 (in PoA or any other protocol) ? If yes, what is the easiest way to do it ??
- 11
0
votes
1
answer
546
views
Modify Geth miner to filter which transactions include in the blocks
Where should I start if Im trying to modify the Geth client to filter transactions by sender to include only specific transactions in the mined blocks ? What files of code should I understand to do it ...
- 3
0
votes
0
answers
24
views
is there a way to create a ens ethereum address to be readable one using cryptography? [duplicate]
I would like to generate address which are readable to people using cryptography and supporting ethereum transactions without problems, I don't want to use ens ethereum because I will have to pay for ...
- 39
0
votes
0
answers
275
views
Disabling nonce check for go-ethereum for a private test net when using web3js batch requests to send tx
I am using web3js batch.add and batch.execute to send tx for an ethereum private testnet that I have created. I send tx using batch.add and batch.execute (don't prefer to use promises since they ...
- 66
1
vote
1
answer
152
views
Attach to tessera node failing
Im installed quorum with tessera but when i need to attach to any node using command $ ./attach.sh 1 show error "Fatal: Unable to attach to remote geth: dial unix qdata/dd1/geth.ipc: connect: no ...
1
vote
2
answers
3k
views
web3js getPastLogs function returns error: query returned more than 10000 results
I have a local ethereum node and I am trying to filter an event for a contract address between a range of blocks. However it throws the following error:
node:15689) UnhandledPromiseRejectionWarning: ...
- 1,012
0
votes
1
answer
7k
views
web3 eth return returns a nonexistent transaction hash
I'm trying to create transactions something like this:
var sender = meth.eth.accounts.privateKeyToAccount(data.fromPrivate)
meth.sendTransaction({
sender,
to: data.to,
amount: data.value,
}, cb)
...
- 141
1
vote
0
answers
271
views
decode a transaction receipt which does not have an event log
Is there a way to decode a transaction receipt which does not have an event log? In the case of an event log we have topics which we can decode, but what about the case when an event isn't triggered ...
- 1,012
0
votes
1
answer
673
views
Decoding input paramters throws invalidity error
Using the abi for a smart contract that I got, I was trying to decode the input parameters for a transaction receipt using web3.eth.abi.decodeParameters function. The logs.json file is as below:
{
&...
- 1,012
1
vote
1
answer
529
views
eth_getLogs was only return erc20 tokens
i have used below command to get every logs on the special blocks but its only return erc20 token logs and ethereum transactions was not listed.
my geth command:
curl --data '{"method":"eth_getLogs",...
- 145
1
vote
3
answers
349
views
Which operations can change ethereum address balance?
I am writing a program that would monitor changes in balance of a set of ethereum addresses. I did the same for UTXO based coins, and the logic was pretty simple. All of the changes were directly ...
- 23