Linked Questions
18 questions linked to/from What does each genesis.json parameter mean?
4
votes
2answers
2k views
callback contain no result Gas required exceeds limit
I am trying to run a function with Remix web compiler on a contract in my private chain. Here is my contract and I am trying to run the function changeVaccinHistory:
contract PatientObjects {
...
0
votes
2answers
149 views
ETH Json RPC output [duplicate]
Looking at the output of https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_getblockbyhash
Does anyone know what do the "mixHash" and "extraData" field mean? and what is the Unit of gasLimit and ...
18
votes
1answer
7k views
The meaning/specification of “config” in genesis.json
As I tried to search from Google, there are some genesis.json example files to customize the parameter of genesis block in Ethereum private blockchain.
In the file, there is a part called "config"
"...
5
votes
1answer
2k views
How to add more Ether on a private blockchain
In geth 1.5 the --genesis option has been removed. What do I use instead to add ether to my account?
4
votes
1answer
5k views
How to Set Gas Price in Private Blockchain?
I admit that I don't understand Gas at all. But I think it is basically the currency which dapps use to interact with each other and the blockchain. Yes?
If you're creating a custom/private network,...
4
votes
1answer
955 views
What do the parameters in the Ropsten genesis file mean?
Here's a snippet of Geth's Ropsten genesis:
"config": {
"chainId": 3,
"homesteadBlock":0,
"eip150Block":0,
"eip155Block":10,
"eip158Block":10,
"eip160Block":10 }
...
4
votes
1answer
440 views
What replay attack protections does Ropsten provide?
I understand the Ropsten testnet was partly necessary because of some broken replay-protection measures on Morden. So what's different for Ropsten?
Is the nonce simply incremented by a smaller ...
3
votes
1answer
178 views
Can someone verify this answer: gasLimit vs. minGasLimit
I would have thought that these are the upper and lower bounds of how much gas can be used in any one transaction. But the mainnet file has the same value for each of these. Can someone explain what ...
3
votes
1answer
3k views
What does the extraData field of a block represent?
I am trying to save some data into a block.
The extraData field has a constant value since block 1.
Also where does the data parameter of sendTransaction() function get stored?
1
vote
1answer
444 views
Why is there a nonce and mixHash value in the genesis file?
I may not fully understand the genesis file.
Why is there a nonce and mixHash value in the file if nothing is being mined?
It was my impression the genesis file is used to bootstrap block 0, then ...
0
votes
1answer
38 views
Storing and retrieving data from a transaction
I have a private blockchain using PoA and would like to store data in the data field of a transaction. To my understanding, the data field has a 32-byte limit and needs to be hex encoded. Is this ...
0
votes
1answer
461 views
I need some clarification about cloning Ethereum
I would like, just for learning purpose how to create a new crypto by cloning the Ethereum.
I know how to make a clone of BTC and LTC, basically with that chains is enough modify some strings (such ...
0
votes
1answer
341 views
Major conceptual misunderstandings about genesis.json
I am having a hugely difficult time understanding the genesis.json file.
Assumption: it seems to me that it serves to both initialize the first block, and also set configuration parameters for the ...
0
votes
1answer
95 views
what changes in the source code are required to run a private Ethereum network?
At first thought that running a private network with Ethereum is going to be easy. Just download the source, modify your difficulty function and you are done. But after getting deeper into the source ...
2
votes
0answers
937 views
Fatal Error while initializing Node from Custom genesis file : “cannot unmarshal hex string of odd length”
I am trying to initializing geth node with the following Gensis file content
{
"nonce": "0x00000000000000042",
"timestamp": "0x0",
"parentHash": "...