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89 views

Ethereum Market Place Design

I want to model the following scenario - a small market place I have 2 nodes in my network - the seller and the buyer. I want to model the market place in that why - that the buyer node asks every ...
4
votes
1answer
2k views

Mist, transaction “couldn't be successfully executed”

For some reason I can't send transactions from my Mist wallet. I'm running the newest version (0.8.7). When I send a transaction, after a couple of minutes I get the message that the transaction "...
4
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0answers
571 views

Insufficient funds in main account (etherbase)main account for gas

I'm using Ethereum/Mist 087. I have 2000 eth in the main account. Trying to send 1800 from the main account to another ether account and Coinbase account. Each time we get the message: ...
4
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0answers
193 views

Whisper protocol: Version conflict between geth and ethereumj

I am trying to use whisper in a permissioned network with both geth and ethereumj nodes. The Java nodes detect the capability shh version 2 of their geth peers, but only check for nodes with ...
4
votes
1answer
427 views

web3 api in eth

Since, I am not able to use the go client in the multi node mode due to a bug (Multi node private local ethereum and send transaction), I tried to use the c++ client eth. Tried using the go client ...
4
votes
0answers
85 views

Can I get a list of all transactions that are sent to a particular contract on Eris?

Can I get a list of all transactions that are sent to a particular contract on Eris? I see that there's a similar solution for the Ethereum API. How can I get a list of of transaction data which are ...
4
votes
0answers
440 views

Proof of stake, mauve paper - glossary of terms

Just getting my head around some of the concepts in Vitalik Buterin's Mauve paper. There are a few terms for which I don't yet have a clear definitions. These include the terms below (shown with my ...
4
votes
1answer
695 views

Sending string to deployed contract function

var source = fs.readFileSync("./vote.sol", "utf-8") var compiled = web3.eth.compile.solidity(source); var abi = compiled.identify.info.abiDefinition; var Vote = web3.eth.contract(abi); var ...
4
votes
0answers
950 views

What is the easiest way to view transaction history if a custom token?

What do you think it's the easiest way to view history of transaction for a custom token ? Like A sent X to be B on XX/XX/XXXX. Especially for people who don't know about Ethereum. A tool like ...
4
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0answers
772 views

Synchronisation using geth; DAO fork-check, dropping is the only message recieved

I'm attempting to synchronise with the blockchain using geth on Win7 64bit. Presently pretty much all I'm getting is repeats of the same message; timed out DAO fork-check, dropping (see bottom). ...
4
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0answers
387 views

Is there an app to read QR code of smartcontract bytecode and trigger it?

I want to know if there is a workaround for a smartphone user to simply scan a QR code that would trigger a transaction using a custom smartcontract (not a native currency). The contract would behave ...
4
votes
0answers
465 views

Unstable connection between peers on a private network

I created a private net, I've been trying to connect two Ethereum nodes because I need one of them to mine the transaction made by the other. The two nodes are on different machines and networks. I ...
4
votes
0answers
437 views

geth throwing header invalid error all the time

lately my ethereum node is repeatedly throwing this error: E0811 16:44:00.646126 core/blockchain.go:1128] uncle[0](30508438) header invalid: nonce for #2004585 [...
4
votes
2answers
1k views

How can I get MHash value when ethminer doesn't provide one?

In order to set up the ethminer I need the MHash value. I'm testing CPU, so I ran: ethminer -M and I got a weird output: Trial 1... 0 Trial 2... 0 Trial 3... 0 Trial 4... DAG 17:33:59.896|miner0 ...
4
votes
0answers
304 views

How to add additional parameters to Ethereum Wallet?

I wish to add a few more fields to the wallet file & save it in the keystore so that I can manage them better. For instance, consider the following: { "address": "...
4
votes
0answers
213 views

Exploit mitigation in EVM JIT

Ethereum is moving to JIT-compiled EVM code: https://blog.ethereum.org/2016/06/02/go-ethereums-jit-evm/ As JIT compiled machine code has turned out to be a common attack vector in the base of web ...
4
votes
0answers
426 views

Deploying contracts on geth returns {“jsonrpc”:“2.0”,“error”:{“code”:-32600,“message”:“EOF”}}

I'm trying to connect geth with truffle to deploy my contracts to my testrpc. When I run truffle deploy it's running but when I do http://localhost:8545/ it's throwing {"jsonrpc":"2.0","error":{"...
4
votes
1answer
136 views

How to work with inherited contracts in EthereumJ?

In EthereumJ, I have two contracts i deployed them individually,first one was deployed but for the second i got error as in that i was calling function of first one and example i have second is first ,...
4
votes
0answers
69 views

How can I link the serpent compiler to geth?

geth offers the function eth.compile.serpent. However, when I try to provide some source to the compiler, it returns The method eth_compileSerpent does not exist/is not available. I wonder: How can ...
4
votes
0answers
389 views

How to create my own wallet and own blockchain explorer?

I'm running my own private/permissioned ethereum blockchain via geth on Ubuntu. How can i interact with my blockchain to visualize accounts, blocks, transactions etc...? I've tried a lot of tutorials ...
4
votes
0answers
424 views

Unable to mine Ether on testnet

My blockchain is in sync and I'm mining using the Mist wallet on the testnet, but I have been mining for three days and have not yet mined any Ether. Am I doing something wrong?
4
votes
0answers
131 views

Genesis.json permanence and updating the blockchain

I understand that the initial genesis.json attributes are a permanent thing, and it cannot be changed retroactively. But what I want to know is which parameters are changeable afterwards and how? ...
4
votes
0answers
268 views

Error: Transaction not confirmed for sendTransaction at rpc connection through http

I am trying to send a transaction to a contract deployed on the testnet. I run the geth HTTP JSON-RPC, with unlock option and the necessary apis accessible. When I exec the web3.eth....
4
votes
0answers
72 views

Is it possible to create a Multisig wallet with only 1 owner confirmation?

I am asking this because of I am looking for a way in case something happens to me, someone else has full authorization. Thanks.
4
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0answers
567 views

How to use the hashimoto light algorithm in pyethash?

I have a problem with using the hashimoto light algorithm in pyethash. I am using pyethash version 23.1 and comparing the results with ethash.run (ethashjs 0.0.7). Using the same inputs the result ...
4
votes
0answers
478 views

sendTransaction and events not working in NodeJS app

I have a contract deployed on the testnet, I can do the following within geth: reference.transfer.sendTransaction(bob, 467, {from:me}) However I can't do this within my node console (with web3 etc. ...
4
votes
1answer
293 views

Main use cases between Open Blockchain and Ethereum

Looking at Open Blockchain's use cases and it appears a lot of these can be done or are on Ethereum, examples: multi-sig contract activation, execution, atomicity of contract execution, reusable ...
4
votes
1answer
130 views

Can someone share your geth export file with me?

I need to setup an archival node ASAP but the download takes around 1-2 block per second. With this speed it will finish in 2 months (if it doesn't stall, but it does, I have to restart it manually ...
4
votes
1answer
588 views

Ethereum Wallet sync completed and ETH balance went to 0

I ran Ethereum Wallet for the first time on my Macbook Pro and, as it was syncing with TestNet, I selected Develop -> Start Mining. I saw the ETH balance increase steadily to 65 but then, it seemed ...
4
votes
1answer
817 views

Is there a way to “clean up” the ethminer installation (ethminer after crashes)?

I'm NOT running Geth or any other wallet on the miners. I have dedicated systems for mining running Ubuntu 15.04, 64 bit desktop with ethminer compiled from cpp-ethereum. Motherboards/Processors range ...
4
votes
1answer
490 views

Redundant PoS node setup

This is a question regarding to computer networks and high availability with remote nodes but it relates directly to Proof-of-stake so I think this would be the place to ask instead of superuser, ...
4
votes
1answer
156 views

Send json rpc request in Long connection

How can i send rpc request in long connection. Since the default rpc request using the short connection. When i send many requests together, the geth will break down with to many open file error, ...
4
votes
1answer
335 views

personal.newAccount(“mypassword”) stops the server when i create two accounts consecutively in local privatenet

personal.newAccount("mypassword") stops the server when i try to create two accounts one after the another. personal.unlockAccount(eth.accounts[0],"mypassword"); same happens when I try unlock ...
4
votes
1answer
276 views

Rubix vs Blockapps vs others, what are the differences in private Ethereum platforms?

What are the major differences between the different private Ethereum platforms? The main two that I am aware of are Rubix and Blockapps, what are the primary differences?
4
votes
1answer
1k views

How deploy a smart contract with meteor and metamask?

I will deploy a smart contract with meteor and matamask. My code in main.js : var inactivityTime = 1000; var continuityContract = web3.eth.contract(Continuity.abi); var continuity = ...
3
votes
0answers
55 views

Stack too deep when compiling inline assembly

I'm running into a YulException: Stack too deep when compiling inline assembly: Variable headStart is 1 slot(s) too deep inside the stack. using a smart contract that has this function. I took this ...
3
votes
0answers
44 views

How do I redirect my .eth domain with eth.link?

Let's say I want to redirect somewebsite.eth.link to www.otherdomainiown.com. http://spacex.eth.link/ does this and the redirect works on chrome. However, I don't see an A record and I do see IPFS ...
3
votes
0answers
99 views

How many times has the Ethereum mining difficulty bomb been pushed back?

Ethereum has a built in mining difficulty bomb to force an upgrade. How many times have the difficulty bomb been pushed out? And by pushing out this mining bomb, doesn't this create more ETH into the ...
3
votes
0answers
27 views

How to get node info by 30303 port?

I need to create something like ethernodes.org or etherscan.io/nodetracker. First of all, I tried to implement Discovery Protocol by own, but after couple of minutes I realized that specs are too hard ...
3
votes
0answers
13 views

How does eth2 Random Election Work?

In eth2 validators will be randomly selected. What is the formula for how this random selection works?
3
votes
0answers
26 views

How do I check transaction status using go-ethereum simulated back-end?

Using the go-ethereum simulated backend, I would like to: 1) Instantly commit a transaction so that it either succeeds or reverts in a given simulated blockchain. So far I'm using sim.Commit() to ...
3
votes
0answers
22 views

Remix debugger ignores breakpoint

Description of issue I'm trying to debug a simple contract using remix on chrome v. 65 on Ubuntu. I must be doing something wrong, because I have the following issue: When I place a breakpoint in ...
3
votes
0answers
40 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 ...
3
votes
0answers
61 views

What is an SSZ partial?

What is an SSZ partial? What are its benefits and are there any existing similar concepts that would help in understanding it? Some references: https://github.com/ethereum/eth2.0-specs/pull/1184/...
3
votes
0answers
42 views

Process address deposit from contract

Our service handles thousands (currently 10000+) of users and each user has his own Ethereum deposit address. To detect a new deposit we: Scan each block to get a list of transactions Get a list of ...
3
votes
0answers
52 views

Does 'estimateGas' behave the same on Ganache and on mainnet?

I noticed that estimateGas behavior in Ganache has changed: In version 6.4.1, it throws an exception if exceeding the gas-limit. In version 6.5.1, it returns the estimation even if exceeding the gas-...
3
votes
0answers
49 views

Cheap EC Operations on Unsupported Curves

I want to be able to verify signatures created by smart meters. Unfortunately, their signature algorithm doesn't use curve ALT_BN_128 but BrainpoolP256r1. I wrote this verification algorithm that ...
3
votes
0answers
302 views

Conflicting reports on sync mode and inability to see balances

I've been trying to maintain a full node for several months. It seemed to be working until I noticed zero balances this morning. etherscan.io site confirmed that balances are not zero, so ...
3
votes
0answers
38 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.
3
votes
0answers
46 views

Parity Ethereum Metamask

I have setup one test node on my machine and trying to connect with metamask and on node console i keep on receiving below message and unable to connect with node using metamask. 2019-06-14 14:48:32 ...

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