44 votes
Accepted

What is Olympic, Frontier, Morden, Homestead and Ropsten Ethereum blockchain?

Each network version gets a name (id). Here is an overview. Olympic (0) is also regularly referred to as Ethereum 0.9; it launched early 2015 and was the first public Testnet. Deprecated in mid 2015 ...
q9f's user avatar
  • 32.9k
19 votes
Accepted

How to enable and mine Testnet (Morden)?

(Hi @phuong, please reply on your progress by adding comments below). Lets go through the steps to get your environment working. We will use the command line geth so we can trace through the issues. ...
BokkyPooBah's user avatar
  • 40.3k
18 votes
Accepted

What prevents the market from assigning value to testnet ETH?

The testnet can be reset any time by the Ethereum developers by issuing a new default genesis block. New testnet nodes would run automatically the new testnet. Therefore people do not build any ...
Roland Kofler's user avatar
12 votes

What prevents the market from assigning value to testnet ETH?

Testnet ETH is practically infinite. The Morden genesis block allocates one address, 1.6e42 Ether. Some Ethereum developers know the private key to this and its primary use is for faucets. Here's ...
eth's user avatar
  • 85.7k
12 votes
Accepted

What's the difference between developer mode and testnet?

The Morden testnet is the public Frontier testnet, meaning there are other miners, and other people will be able to see your contracts. It is important to note that you should not use the same ...
Tjaden Hess's user avatar
  • 37.1k
8 votes
Accepted

Testnet First Transaction Nonce

It looks like you are on a testnet, which implements an initial nonce of 2^20 (0x100000). The reason this is used is to prevent replay attacks on the main net, where transactions on the testnet are ...
Tjaden Hess's user avatar
  • 37.1k
7 votes
Accepted

How to switch from Morden to Ropsten?

Using Geth 1.5.3 and later, it's 2 steps: Run geth --testnet removedb to delete your blockchain database for the Morden network. Run geth --testnet ORIGINAL: When you use geth init, the datadir ...
eth's user avatar
  • 85.7k
6 votes
Accepted

What's the difference between Olympic, Morden and Ropsten?

Olympic has the network ID 0. It was the pre-release testnet launched in early 2015. Somethimes this network is referred to as Ethereum Version 0.9. It was discontinued in July 2015 when Ethereum ...
q9f's user avatar
  • 32.9k
6 votes
Accepted

What is the proof that Mainnet can't be reset?

A blockchain is about consensus on the starting point, the genesis block, and all the blocks after. There is virtually nothing that prevents anyone from creating a new genesis block and blockchain, ...
eth's user avatar
  • 85.7k
6 votes
Accepted

getTransactionCount always returns 1048576, no matter what address

It looks like you are on a testnet, which implements an initial nonce of 2^20 = 0x100000 = 1048576 More details here: https://github.com/ethereum/wiki/wiki/Morden#details Initial Account Nonce (...
jrbedard's user avatar
  • 524
5 votes
Accepted

How to bootstrap AlethZero on Morden testnet?

There are much fewer nodes on Morden than on the main network. 6377 on the main network right now (http://ethernodes.org/network/1) 344 on Morden (http://ethernodes.org/network/2) We have also had ...
Bob Summerwill's user avatar
4 votes
Accepted

Testnet tx reappears after 90 blocks

At some point, the local Geth node reported tx 2e7a57c55a7cb28d0e233d7745210dba93c09f14c5df4e879db1a530a79a842a in the block 1369316 on testnet. It then disappeared from the chain at some point ...
Sebi's user avatar
  • 5,294
4 votes
Accepted

Not receiving wei from Morden faucet

Probably this happens because the morden testnet was forked at the block 1885000 (no more exists), now the Ethereum network support the Ropsten testnet. so the previous faucet provider will not send ...
Badr Bellaj's user avatar
  • 18.8k
4 votes

What is Olympic, Frontier, Morden, Homestead and Ropsten Ethereum blockchain?

That´s right. Homestead is the current main network whereas morden is commonly called the 'testnet'. They are both similar beside their content and value. Testnet 'coins' are worthless. While users ...
Chevdor's user avatar
  • 221
3 votes

Is there any testnet faucet for ETC Ethereum Classic Coin?

See this issue on github: https://github.com/ethereumproject/go-ethereum/issues/708 You have to ask them in the group.
cqx's user avatar
  • 3,462
3 votes

How to switch from Morden to Ropsten?

In your second call there is a space between -- and datadir, so probably you are running geth with the wrong data directory and therefore you are using the wrong genesis block. Try running geth --...
phlogratos's user avatar
3 votes
Accepted

How to manually switch Mist to Ropsten?

You need to use the correct relative path or absolute path for your genesis JSON file. Relative path would be: geth --datadir ./Library/Ethereum/testnet init ./Library/Ethereum/testnet/...
q9f's user avatar
  • 32.9k
3 votes
Accepted

JSON-RPC command to get blockchain synchronization status

For JSON-RPC there's eth_syncing: // Request curl -X POST --data '{"jsonrpc":"2.0","method":"eth_syncing","params":[],"id":1}' // Result { "id":1, "jsonrpc": "2.0", "result": { ...
eth's user avatar
  • 85.7k
3 votes
Accepted

Is it possible to give a contract the same address from morden

While it is theoretically possible, it's not very practical. The address of a contract is computed by sha3 hashing the creator's address with the creator accounts nonce. Thus, if you wait until your ...
Tjaden Hess's user avatar
  • 37.1k
2 votes

What's the difference between developer mode and testnet?

A live testnet will put you on a live public testnet: which is a network ID that isn't 1 = that is mainnet. Network Chain Network ID mainnet ETH 1 ropsten ETH 3 rinkeby ETH 4 goerli ETH 5 ...
Tomachi's user avatar
  • 461
2 votes

Oraclize API not returning anything in Morden testnet

TL;DR: The contract didn't have enough balance to pay the Oraclize fee required after the first call to Oraclize. Going to explain this answer since it was never explained: OP was attempting to use ...
KFichter's user avatar
  • 261
2 votes
Accepted

Out of gas error deploying library

gasUsed == gas indicates that all gas, which was send with this transaction was used during the process. This can happen often, if no manual gas value for a transaction was given. > web3.eth....
Denis's user avatar
  • 911
2 votes

geth --testnet error:"could not open database"

I had this problem too at one point. The best thing to do is to stop everything and restart your computer. This will stop all Ethereum processes. You could kill processes using the task manager / ...
Zyzz's user avatar
  • 21
2 votes
Accepted

geth --testnet error:"could not open database"

problem This error is caused by a process who use this folder/chain. Perhaps you've runned a previous geth client which is still alive in the background. Solution stop geth process or try to ...
Badr Bellaj's user avatar
  • 18.8k
2 votes
Accepted

Transaction not performed, morden.ether.camp has different transactions than me (Morden)

Make sure that you are running geth version 1.4.18 or later (I don't know about the 1.5x dev version). For Parity, Ethereum Wallet and EthereumJ, see FAQ: Upcoming Ethereum Hard Fork. This hard fork ...
BokkyPooBah's user avatar
  • 40.3k
2 votes

Solidity stuck at mining transaction

Apparently Ethereum testnet was reset and the new testnet is called Ropsten. Since the change, the solidity web compiler had some issues and will hopefully be resolved soon. Meanwhile try to use ...
PetrosM's user avatar
  • 526
2 votes

Solidity stuck at mining transaction

The morden testnet is basically dead at this point, and really only exists for the sake of viewing old Dapps. I recommend using the Ropsten testnet instead, which should show up in your MetaMask ...
DanF's user avatar
  • 2,626
1 vote

Is there any testnet faucet for ETC Ethereum Classic Coin?

We have a Kotti Faucet here: http://kottifaucet.me/ You'll need to use your social media account to request funds by tweeting out and sharing the link to your tweet in the form. Instructions are ...
Yazanator's user avatar
1 vote
Accepted

How to reenter the "main" morden network without removedb?

The problem was that morden was running down
Labo's user avatar
  • 285

Only top scored, non community-wiki answers of a minimum length are eligible