All Questions
21 questions
3
votes
2
answers
944
views
Modify storage in Ganache or Hardhat Network?
I have an orchestrated contract with a function that can only be called by another contract.
While struggling to find an elegant solution for writing a unit test, I realised that I could circumvent ...
- 18.7k
2
votes
1
answer
501
views
Request to http://localhost:8545 from https website
I am building a website that should interact (from the browser, not back-end) with custom Ethereum nodes, including local, something like MyEtherWallet.
I can connect to ganache http://localhost:8545 ...
0
votes
1
answer
757
views
Manage accounts in Remix Web3 Provider env connected to a TestRPC client node
When I run the TestRPC client (ganache-cli), it provides me with 10 different accounts and private keys along with a local server at localhost:8545
Available Accounts
(0) ...
- 101
2
votes
2
answers
2k
views
Ganache-cli EADDRINUSE 127.0.0.1:8545 error?
when i start ganache-cli with command, it gives this error :
❯ ganache-cli
Ganache CLI v6.4.1 (ganache-core: 2.5.3)
Error: listen EADDRINUSE 127.0.0.1:8545
at Server.setupListenHandle [as ...
- 167
2
votes
0
answers
160
views
issue with persistence of blockchain data in ganache-cli [duplicate]
a request for these users (Richard Horrocks, Achala Dissanayake, shane, flygoing ), please read the questions completely and understand them... then answer them if you actually know something about ...
- 135
1
vote
2
answers
3k
views
ALERT: [ethjs-rpc] rpc error with payload
I am trying to create transaction local blockchain using ganache on When i confirm the transaction i get the error as "{"id":4818399857527,"jsonrpc":"2.0","params":..", please refer screenshot for ...
- 57
3
votes
1
answer
2k
views
ganache-cli doesn't have enough funds to send tx – number increases proportionally to however much I initialize a wallet with
I'm trying to write a simple function to send a transaction using web3 and ethereumjs-tx that empties the wallet of an account (call this account A) into another account (account B). However, no ...
- 167
2
votes
3
answers
4k
views
Metamask won't display correct balance after creating customrpc for ganache accounts
I made a customrpc network on metamask using the correct server and imported a private key from ganache, which worked but the eth balance is displaying 0 when I expected it to display 100.
According ...
- 41
0
votes
0
answers
159
views
How to be sure "ethereumjs" is installed?
I installed ethereumjs library using following command:
npm i ethereumjs-testrpc
And here is the output:
And then I tried to run an html example which uses ethereumjs-vm. The example is here :
...
- 2,700
0
votes
1
answer
563
views
Truffle test not working when I add migration.js
I have written javascript tests that run fine with truffle test ./test/Token.js
However, when I have the following:
var UTO = artifacts.require("./uto.sol");
module.exports = function(deployer) {
...
- 97
0
votes
0
answers
143
views
Why account balance can decrease when gasPrice is 0 and msg.value is 0?
It also spends pretty large amount, which doesn't seem to be related to gasUsed
Contract:
pragma solidity ^0.4.24;
contract Test {
bool i;
function hello() public {
i = true;
}
}...
- 171
1
vote
0
answers
231
views
How can I watch my contract using Ganache testRPC?
I want to get the transaction hash + contract address ... using Ganache testRPC.
since I don't have the option of using etherscan because testrpc of ganache use everything locally.
0
votes
0
answers
404
views
Ganache cli transaction hash collision
I am making couple of forwarding transactions (i.e. to contract address that just receives funds and proxifying it to main contract) locally on Ganache CLI running (old testrpc does the same result) ...
- 1,277
0
votes
0
answers
407
views
Smart contract storage doen't work with ganache
I have this smart contract
contract Ballot {
struct Prop {
uint votes;
bytes32 data;
address[] validators;
}
mapping (bytes32 => Prop) props;
function ...
- 1,121
4
votes
2
answers
1k
views
Solidity Error: Exceeds block gas limit
When I start ganache-cli in one terminal window and run ./node_modules/.bin/solidity-coverage (command from documentation) in another I get
Error: Exceeds block gas limit
at Object....
- 729
1
vote
1
answer
360
views
which wallet is usable with ganache test-rpc?
I tried metamask, but unable to send ether between accounts because metamask is trying to estimate gas and gets stuck :(
myetherwallet doesn't save my seed so I need to enter it all the time
- 603
0
votes
2
answers
4k
views
Cannot read property 'deployed' of undefined issue
I am trying to launch an Election-Dapp.
I have these dependencies installed:
- Nodejs v9.11.1
- npm v5.8.0
- Truffle v4.1.3
- web3js v0.2
- ganache-cli
Below is my solidity contract
pragma ...
- 103
0
votes
1
answer
1k
views
VM Exception while processing transaction: invalid opcode
I am trying to save string into a contract and hit this error.
My contract is
pragma solidity ^0.4.18;
contract MyRecord {
address owner;
address guest;
string note;
modifier ...
- 101
7
votes
2
answers
5k
views
How to properly simulate mining time with Ganache CLI
I am using the Ganache CLI for testing my smart contracts and frontends. I need a way to incorporate a delay into ganache-cli when performing write transactions in order for it to more closely ...
- 279
4
votes
2
answers
2k
views
Ganache/Web3: "Key not found in database"
I am using Ganache CLI v6.1.0 (ganache-core: 2.1.0)) (started with default settings by running simply ganache-cli), web3 (^1.0.0-beta.33), and my smart contract is written for solidity ^0.4.0.
I have ...
- 145
14
votes
2
answers
4k
views
Truffle's Ganache VS Testrpc
Is there any major difference between Truffle's Ganache and TestRPC? Do they run irrespective of each other as test blockchains, are there any side effects running both at same time? Is the only ...
- 247