All Questions
697 questions
1
vote
1
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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
0
answers
62
views
geth.exe checksum is differant than what is writen on the website but the installers checksum is correct. is this an issue?
I started syncing geth with this command he command:
geth --rpc --etherbase <pulbic wallet adrress> --syncmode=fast --cache=2048
and about 25 hours later, the syncing stopped and this error ...
- 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
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
2
votes
0
answers
155
views
How to convert geth arhive to full node without loosing intermediate state
We have a geth node that runs with --gcmode "archive". However, the recent growth of disk space is unsustainable and we want to change this to a full node. If I stop the node and just re-run ...
- 111
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
44
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
2
votes
1
answer
479
views
Can I stop geth when it is halfway done and restart it without loosing all the first half of data?
I have started geth (fresh install) using this command:
geth --datadir "my/path"
I'm halfway done with sync and would like to restart my PC.
Will I loose all the data accumulated so far or ...
- 1,615
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
1
vote
0
answers
36
views
Why does ethereum chaindata sometimes sync while syncing?
I am doing a fresh geth 1.9.18-stable sync, which I believe is fast by default. I am keeping an eye on the size of the .ethereum/geth/chaindata/ directory and have noticed that it does not increase ...
- 645
1
vote
2
answers
1k
views
Is Ethereum fast sync feasible to get logs
I want to get the logs of an contract address by filtering the even with transfer Event. I cant use Infura for its restrictions and limits. So i want to sync my own ethereum node for myself.
Since my ...
- 1,012
2
votes
2
answers
1k
views
Syncing geth 1.9.15 took too long on HDD raid-0
I've been running full node on a server with this config:
Centos 7
11 Tb hdd raid-0
32 Gb ram
and I'm using geth 1.9.15-stable-0f77f34b
I'm trying to be archive node but syncing took over 1 months ...
- 23
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
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
0
votes
0
answers
747
views
geth full node taking forever to sync
For three days I've been trying to sync a full node. Syncing the last two days has taken about six hours a day. At this rate I won't be able to sync it. It's behind "age=3y8mo5d".
This is the ...
- 205
0
votes
1
answer
540
views
Ethereum stores its own data, how to synchronize the data to other nodes in the future
I use smart contracts in Ethereum to store some string data, how to synchronize these stored string data to other nodes.
As far as I know, these string data are stored in the node's leveldb database, ...
- 437
0
votes
1
answer
912
views
Error encountered during contract execution [Reverted] Problem with Contract
I've sent the transaction - https://ropsten.etherscan.io/tx/0xbecb36319d806edc3617abcbeb1f95e7215cb205dc180088f225c1addd82086f to the contract address and it got reverted.
Could someone explain me ...
1
vote
0
answers
174
views
Geth server syncs itself very slow on SSD storage
This is the second time I've lunched a Geth server with full mode on a server with the resources below:
4Core CPU
16GB RAM
400GB SSD
But server keeps staying arount half of highestBlock and its ...
- 327
1
vote
1
answer
523
views
Is it possible to initiate Geth server from a specific block instead of genesis block?
I tried setting up Geth servers in full node different times, and all of them are always behind half of total max block. So, they cannot be synced easily even after weeks. I would like to know can I ...
- 327
1
vote
0
answers
352
views
Geth stops working after being fully synced
I have a Geth server in full mode. It was synced fully and I was using it normally for weeks. Today, I wanted to check the synchronization status, so I used geth attach command to enter to the Geth ...
- 327
1
vote
3
answers
1k
views
Number of state entries needed before geth node is synced up with Ropsten
I am currently syncing a Geth node with the Ropsten network. Currently the download in the terminal show a neverending stream of Imported new state entries. I understand that I have to wait for all of ...
- 46
0
votes
0
answers
89
views
How to duplicate a Geth server?
I have a Geth server which is fully synced, but the second server I have lunched cannot being synced after 2 weeks! I don't know why is this happening, but I decided to test another way.
I setup a new ...
- 327
3
votes
1
answer
4k
views
Can we improve the performance of Geth server by setting maxpeers to 0?
I've lunched a Geth server in full node. I think the performance of machine for syncing is not acceptable and needs much more time to be synced fully.
I would like to know if I set maxpeers to a low ...
- 327
2
votes
2
answers
779
views
Why knownStates and pulledStates are always 0 on my full node?
It's the second time that I run a Geth in full node. The first one got synced fully, but the second one did not sync after a week. Both servers have the same configuration and infrastructure. Using ...
- 327
0
votes
0
answers
55
views
Write Secret Shared Data onto Ethereum
What would be an approach to do the following:
1) Secret Share data provided from a file
2) Publish the secret shared data onto an Ethereum instance (aleth/geth)
3) Be able to retrieve and ...
4
votes
2
answers
2k
views
Is it possible to sync an archive node with HDD in 2020?
Many bloggers have pointed out that it is almost impossible to sync an ethereum archive node using a HDD.But most of those blogs were published in 2018.
I've seen several version updates of geth ...
- 71
1
vote
0
answers
188
views
Can chain states be processed faster or in parallel? (geth full node syncing)
I am trying to understand more about chain states. Basically Geth is capable of downloading blocks pretty fast now, but getting "known" and "pulled" states takes much longer and seems to be ...
1
vote
2
answers
91
views
Can I connect to testnet after synchronization finished on mainnet?
I just finished block synchronization on mainnet by default, but I realized I want to try on testnet first. Should I do synchronization on testnet again? Or how can I connect to testnet?
Thanks a lot....
- 15
0
votes
1
answer
83
views
Compiling cpp-ethereum (aleth) sources as a part of my cpp project
I want to use cpp-ethereum aleth smart contracts sources in my altcoin project. My sources can compile with cmake or autotools system. I tried two ways to compile cpp-ethereum with my sources:
Using ...
- 21
1
vote
1
answer
140
views
Running geth - ssh doesn't work
The Ethereum light node is synced by geth, but when we tried to sync it we lost ssh connection. We assumed that while it is syncing it is impossible to connect via ssh to computer. If anyone has any ...
- 11
0
votes
1
answer
213
views
Are there any API to get real money value equivalent of a transaction?
I know that etherscan shows the total cost of a transaction both in eth and in US dollars.
Is there any api of any kind to be able to get instant value of eth when I send a transaction?
- 343
0
votes
2
answers
800
views
How can I send tokens to large number of addresses?
I have to send 221,000 tokens (ERC20) to 6477 different addresses. Airdrop guy used some automatic sending app and that tells 1.94 ETH is needed as approx cost of operation to send all this.
Is there ...
0
votes
0
answers
445
views
How much more it will take for Ethereum wallet to Sync - 2019
I has been a week when I tried to Sync Ethereum on SSD VPS. Here are the details -
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): ...
- 183
2
votes
1
answer
1k
views
Generating an address from a public key in C++
Example:
Input key = 0x025f37d20e5b18909361e0ead7ed17c69b417bee70746c9e9c2bcb1394d921d4ae
Output address = 0xd09D3103CcABfb769eDc3e9B01500Ca7241D470A
I have been using an algorithm from keccak-tiny....
- 131
1
vote
2
answers
359
views
(error_10) Please enter a valid data value (Must be hex.)MyEther Wallet
I'm trying to deploy a smart contract on Myteherwallet but getting an error while deploying the byte code of the smart contract which is written in solidity remix IDE.
I have even tried to change the ...
- 96
4
votes
0
answers
210
views
Question on initial sync and Freezer (SSD and HDD)
I've kicked off a fresh fast sync of Geth v1.9.2 and after 3 weeks it's still pulling states (state trie).
As per the documentation you can use the Freezer with a HDD as it references old data so ...
- 141
0
votes
2
answers
92
views
No longer have tokens after updating Nano S [closed]
I recently updated my Nano S and was required to reset everything. After udpdating I went to MEW to swap my KIN & I had a ETH Ballance of 0.000 & a KIN ballance of 0.000. I have the address ...
- 1
0
votes
1
answer
132
views
Any QuickBlocks tutorial?
From my understanding QuickBlocks is an api in C++ that provides similar services as etherscan API for the ethereum blockchain. Is there a link or tutorial to use quickkblocks because the example in ...
0
votes
1
answer
126
views
what will happen to transactions on smaller length chain when peered with longer length chain in private ethereum
what will happen to transactions on smaller length chain when peered with longer length chain in private ethereum?
Below is the scenario
Step 1: I have started Ethreum private chain in 2 different ...
- 312
0
votes
1
answer
72
views
Adding the delta to a token transfer
Let's say I have 5 contributors to a pool of a smart contract. They all contributed 1 ether. The smart contract lost 2 ether, and now I want to transfer back the remaining 3 ether to the 5 ...
- 1,375