Questions tagged [testnet]

This tag should be used for questions regarding the third Bitcoin testnet. The testnet is a network separate from the main Bitcoin network that allows developers to attempt modifications of the bitcoin protocol safely and test in-development software without risking money.

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29
votes
10answers
43k views

Is there any where to get free testnet Bitcoins?

I'm building a project with bitcoins and want to test it with testnet. However, I don't have any testnet bitcoins, and despite the difficulty being less than 100 usually, I still haven't been able to ...
26
votes
12answers
17k views

Is there a blockchain.info for testnet?

I'm trying to test to see if transactions went through or not and blockchain.info is super helpful for this on the real network.
17
votes
2answers
437 views

How thoroughly has Segregated Witness been tested?

I've encountered claims that Segregated Witness was "not really tested" and is being "rushed". It is my understanding that SegWit had been running on Elements for more than half a year already, and ...
16
votes
1answer
5k views

getrawtransaction error? [Code -5]

I'm trying to read raw transactions but there is a problem; Seems like getrawtransaction only works for recent transactions, old transactions give me the next error: No information available about ...
13
votes
2answers
957 views

What are the key differences between regtest and the proposed signet?

What are the key differences between regtest and the proposed signet? One of the key differences is that using regtest is not ideal for public networks as anyone anywhere can just rewrite the ...
10
votes
3answers
2k views

Testnet eWallet?

Is there any eWallet available that works on the TestNet? I want to test some payments and so forth and sometimes I want to have an access to an online wallet, so I don't need to hassle with ...
9
votes
1answer
3k views

Difference between regtest and testnet

I'm not sure what is the difference between regtest and testnet, they seem are different things but i cant find the different between them. Does one have more stuff than others? On the regtest, peer ...
9
votes
1answer
1k views

Reduce difficulty on testnet-in-a-box?

I'm doing some testing and often find myself needing to generate 6 blocks quickly to confirm some tx. Each block takes a few minutes to generate on my macbook so this slows things down considerably. ...
8
votes
2answers
12k views

To run bitcoin core testnet on Ubuntu 16.04

How can I run Bitcoin core testnet version on ubuntu 16.04 platform ? I am getting so many reference about how to run bitcoin core mainnet but it will take around 20 days to synchronize with the ...
8
votes
2answers
2k views

How to check if node is on TestNet or MainNet via `bitcoin-cli`?

Is there a way, by using bitcoin-cli using RPC querying, if the node I'm querying is running on MainNet or TestNet? Thanks
8
votes
2answers
6k views

Difference between bitcoin and testnet, really

Other than what is listed in the wiki, what is the difference between the two networks? Could you sell test Bitcoins for money if you could find someone willing to buy? What would happen if you ...
8
votes
1answer
841 views

Why does vanitygen ban certain letters on testnet?

I'm guessing that vanitygen is more strict or has different rules than production's Base58 rules. Why are some of thse names marked not possible? C:\vanitygen>oclvanitygen -k -o gpukeystestout....
8
votes
2answers
290 views

Who are the key developers, and where can I follow their progress and decision making?

I want to follow the most up to date developments of Bitcoin, (such as M of N transaction confirmation). Who are the primary developers of Bitcoin and what is the most efficient way to track the ...
7
votes
1answer
4k views

Receive money in regtest mode

I am working on a app in which my project communicates with the bitcoin server to get the details of a transaction with transaction id as the parameter. I have bitcoind, bitcoin-cli and bitcoin-qt ...
7
votes
3answers
2k views

Can an address have negative balance?

This address:n1JagbRWBDi6VMvG7HfZmXX74dB9eiHJzU (on testnet) has a negative balance of -0.27388239 according to: https://www.biteasy.com/testnet/addresses/n1JagbRWBDi6VMvG7HfZmXX74dB9eiHJzU, namely, ...
7
votes
1answer
679 views

How to use bitcoinjs with TestNet?

One of my colleagues is trying to use bitcoinjs with TestNet, but apparently it doesn't like TestNet headers, so it doesn't work. Is there any way to make to use bitcoinjs with TestNet? Is there some ...
7
votes
1answer
1k views

How can I find the "real" difficulty on testnet?

As is well known, testnet has a "20-minute rule": if no block is found within 20 minutes, the mining difficulty drops to 1 until a block is found. From some experimentation, it appears that bitcoind'...
7
votes
1answer
641 views

How peer discovery works after connecting to hardcoded nodes?

I am tinkering with the bitcoin source code and trying to understand the exact working of peer discovery mechanism in the testnet mode for which I have made the following changes: Disabled the DNS ...
6
votes
3answers
586 views

How to experience the thrill of mining?

Bitcoins are hard to mine now. I've always wanted to actually earn them, but never actually gotten much of anything. I want to create my own blockchain, separate from any other networks, so that ...
6
votes
3answers
3k views

Paying for testnet coins?

If testnet coins are this difficult to get, what's the chance people start throwing in some real money to speed along the process? If only to just have to not wait to test, say if you have an ...
6
votes
3answers
8k views

How to get Electrum 3.1.3 on bitcoin testnet?

I'm building an application on bitcoin and want to use testnet instead of using real bitcoins to do my test. I'm mainly using Electrum-3.1.3 to do sweeping of addresses. But how can I switch this to ...
6
votes
1answer
1k views

Has the TestNet ever been reset?

The Bitcoin TestNet is a network identical to Bitcoin in every respect except that the bitcoins on it are worthless because no one accepts them in payment or values them for anything other than ...
6
votes
2answers
4k views

How do I generate coins on testnet? CPU, GPU, FPGA? Are there pools?

Is it possible to mine coins on testnet using CPU? GPU? How about FPGAs? Are there any pools running on testnet? The reason I am looking for this is so I can master the new API's relating to ...
6
votes
3answers
21k views

How to generate a testnet address?

Bitcoin addresses can be generated on this site https://www.bitaddress.org, but the test network needs m or n at the beginning of the address, where can those be generated?
6
votes
3answers
3k views

How can I run bitcoind on test and production networks, at the same time, on the same computer?

Bitcoin and Bitcoind will send an error if it is launched multiple times. I'm assuming this is because they share the same database and wallet. Is it possible to run two instances of Bitcoin QT / ...
6
votes
2answers
3k views

Is there an active testnet for Bitcoin Cash?

To learn more about Bitcoin Cash, I would like to try some things on the testnet. I installed bitcoin-abc, made a copy of an existing datadir from a Bitcoin Core testnet install, and ran bitcoin-abc -...
6
votes
2answers
2k views

Connecting two local nodes in RegTest

I am trying to connect two local regtest nodes together. I am able to run one regtest node without any issues, and am also able to run the bitcoin-cli commands such as generate to create my own chain, ...
6
votes
2answers
4k views

How can I tell when bitcoind has found a block?

I'm using the traditional bitcoind -gen on the testnet to mine some test bitcoins. I did this on one machine for a few hours, and stopped when I found a faucet. Later though, I magically obtained 50 ...
6
votes
1answer
863 views

What is my chance to find a block on a TestNet ?

My gethashespersec is 4806082, on the TestNet what is my real chance to find a block ?
6
votes
1answer
2k views

Example accepted getwork function input and output?

I'm looking for example getwork input and output of a successful block hash to verify a getwork client I've implemented. I'd also accept suggestions on better ways to verify this. I've looked at ...
6
votes
2answers
899 views

Is there a Shapeshift service for Testnet coins to convert Bitcoins to other Altcoin testnet coins?

I'm building an app and I'm working with btc testnet coins, but I want to be able to convert them to other altcoin testnet coins. Is there such a service out there?
6
votes
1answer
2k views

Testnet: mandatory-script-verify-flag-failed when doing OP_RETURN

For some reason I keep getting error: {"code":-25,"message":"Missing inputs"} EDIT: Updating error now that the full testnet blockchain is downloaded "code":-26,"message":"16: mandatory-script-...
6
votes
1answer
537 views

Working example of raw transaction utilising Boolean (OP_IF, OP_ENDIF) scripting REQUIRED

I recently posted this Testnet TX (TxID 2d0daa01da8294a54178f8111eb2a02010c425fd15957d8baee8717edcfbe105) which successfully spends an output (TxID ...
5
votes
1answer
587 views

How do I get set up on Signet?

I have heard about Signet here and here. How do I get set up on Signet?
5
votes
1answer
348 views

How to test if a transaction is standard without spending real money?

The problem with Testnet is all types of transactions are allowed, so how can I know if a transaction would be rejected on mainet ?
5
votes
1answer
724 views

How to run Bitcoin Core both main and testnet on the same machine?

How to run Bitcoin Core both main and testnet on the same machine? I want to be able to communicate with both block-chains via RPC. Do I need to run 2 instances on bitcoind / bitcoin-qt.exe for that?
5
votes
1answer
265 views

Will there be a testnet4? Or do we not need a testnet reset once we have Signet?

The last testnet reset was for the current testnet3 back in 2012 (not including segnet which was a testnet for SegWit before SegWit was activated on mainnet). Are we due another testnet reset? Or is ...
5
votes
2answers
3k views

Cannot get Bitcoin-QT to run in testnet mode

I downloaded Bitcoin-QT for Windows 7 into: MYUSERNAME/Downloads/bitcoin-0.8.6-win32/bitcoin-0.8.6-win32 I want to run Bitcoin in testnet mode, so I created bitcoin.conf with only the following ...
5
votes
1answer
824 views

Bitcoin core's estimatesmartfee error "Insufficient data or no feerate found" with synced node

I'm running bitcoin core version 0.17.0 on the Testnet and since yesterday, I've been experiencing problems with the RPC estimatesmartfee. I'm getting as a response: "errors": "Insufficient data ...
5
votes
1answer
1k views

Problem with sendrawtransaction

When I use bitcoin-cli sendrawtransaction and only get -25 errors. I have tried to push the transaction using different blockchain explorer sites, but that didn't work. I have tried: ...
5
votes
1answer
1k views

Creating Mining Competition on regtest

As we know , Bitcoin core-Regtest is used to set up our own blockchain starting from Genesis Block. I have created Two nodes on my localhost running on different ports (I am using Windows 8.1). They ...
5
votes
1answer
1k views

Cannot create a transaction

I am trying to create a transaction on the bitcoin testnet, using bitcore: Error Message : SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data Here is my code: var ...
5
votes
1answer
872 views

Are there any mining pools operating on the Testnet? [closed]

Are there any mining pools operating on the Bitcoin Testnet, or do pool owners just test their code using their own machines without keeping the test pool up for too long?
5
votes
1answer
582 views

Test Network Genesis Block

I am using BitcoinJ for my java application which fetches the test network's genesis block. I referred to the basics mentioned at JavaWorld and BitcoinJ's Google Code wiki. I am able to get it ...
4
votes
3answers
4k views

Is there a sandbox in bitcoin for testing?

Is there a sandbox in Bitcoin for testing, so that I can create sample bitcoins without mining and do transactions for testing purposes?
4
votes
2answers
2k views

bitcoin-cli commands like createrawtransaction not working with json on command line

I am trying to create raw transaction using the createrawtransaction api on testnet using the Windows7 command line. I always get an "error parsing JSON": C:\Users\amjad>bitcoin-cli -testnet ...
4
votes
2answers
2k views

running live and test node simultaneously

it took me 4 days to fully synchronize my node, but its finally running and i can create wallets etc.. I wanted to experiment with some transactions on testnet, so need to either change my config or ...
4
votes
1answer
936 views

Testnet difficulty change

Has something changed recently in testnet? Today I've been seeing new blocks appear every 1-5 seconds instead of the usual 10-20 minutes
4
votes
2answers
1k views

Is there a Bitcoin testnet that is really small so you can quickly download the blockchain and test stuff?

Is there a Bitcoin testnet that is really small so you can quickly download the blockchain and test stuff?
4
votes
2answers
12k views

How can I use the Litecoin testnet?

Is there any Litecoin testnet explorer which records Litecoin testnet transactions? Where can a Litecoin testnet wallet be downloaded? Any reference or step by step explanation would be much ...

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