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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4
votes
1answer
478 views

Can you break down what data is encoded into a bech32 address?

Can you break down what data is encoded into a bech32 address? e.g. bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4 How do bech32 addresses on testnet, regtest, signet compare?
29
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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 ...
4
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1answer
937 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
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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?
2
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1answer
1k views

dumpwallet output documentation & explanation?

Where do I find complete documentation on what the console command "dumpwallet" output means? Sample of my testnet output: # Wallet dump created by Bitcoin v0.21.0 # * Created on 2021-01-...
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'...
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 ...
5
votes
1answer
592 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?
0
votes
1answer
73 views

What can I expirement with BitcoinCore on my own?

I have a simple faculty assignment where I have to do some experiments with transactions or experiment with the Bitcoin protocol or maybe with wallet code. Work on that assignment shouldn't last more ...
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 ...
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.
13
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2answers
963 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 ...
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
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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
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?
1
vote
1answer
524 views

OP_RETURN custom message in testnet transaction

I would like to do a bitcoin transaction in testnet by embedding a custom message in the OP_RETURN. do i have to download the bitcoin core client with and the block chain to do that? or can i use a ...
2
votes
2answers
167 views

testnet3 frequent tx malleability

Related How confirm my own doublespend transaction got confirmed This is not about double spends and I believe that the related question is not about double spends ether! On bitcoin's testnet3 I am ...
2
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1answer
1k views

testnet3 node sync process is very slow

My config file is similar to this: testnet=1 blocksonly=1 rpcport=5000 server=1 listen=0 prune=1000 dbcache=16000 rpcallowip=0.0.0.0/0 rpcuser=someuser rpcpassword=somepass I have started the ...
0
votes
1answer
220 views

How do we prevent the Test network from being misrepresented as production?

I'm concerned that people new to Bitcoin may not be aware that the test network exists, and the new users will end up "paying" for Bitcoins that are essentially worthless. What protections are in ...
3
votes
1answer
4k views

trouble with bitcoin cli regtest

These are the commands I'm running after building a clean ubuntu docker image with all the dependencies: ./src/bitcoin-cli -regtest & It yields the error: error: too few parameters (need at least ...
2
votes
1answer
2k views

Can't specify rpcport for testnet

Was there a recent change where it is no longer possible to specify rpcport? I noticed these two warnings: Warning: Config setting for -addnode only applied on test network when in [test] section. ...
1
vote
1answer
947 views

testnet server won't get any btc from TP's TestNet Faucet. what is the reason?

I have generate bitcoin address from testnet server. but I can't get any btc in those address. i tried many times and I failed. can anyone explain me that is the reason? whay i can't get btc on ...
17
votes
2answers
438 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 ...
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 ...
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 -...
3
votes
1answer
860 views

Why outputs' spendable and solvable are false?

I noticed a transaction whose spendable and solvable are both false, what does this mean and why? { "txid": "c940241a0ef626e865e2004bc120536fb7868d510115e923c76d5e658a97f6d5", "vout": 0, ...
4
votes
1answer
491 views

How to make a taproot transaction with bitcoin-cli?

Can you give a simple step-by-step example for a taproot transaction with bitcoin-cli on Testnet?
4
votes
1answer
709 views

Testnet version history

From Bitcoin Wiki: Testnet There have been three generations of testnet. Testnet2 was just the first testnet reset with a different genesis block, because people were starting to trade testnet ...
3
votes
1answer
85 views

Where can I find taproot spend examples on testnet/signet?

I am in the middle of writing some Taproot libraries and would like some testnet/signet p2tr spends. Is there an easy way to find them? Most explorers don't have any filters like that. Even a list of ...
3
votes
2answers
358 views

Do testnet networks require the same main network fee?

As in the title, I'm wondering if testnet networks always require the same fee. I know the coins aren't worth any thing, so it doesn't matter if I have to pay the fee or not, but I'm just curious.
3
votes
2answers
4k views

bitcoind in testnet is not synchronizing

I installed bitcoind into Linux. I'm running it in testnet mode but it is not synchronizing as it is not downloading blocks. I have the following in bitcoin.conf: rpcport=8332 # Needed for testnet ...
2
votes
1answer
2k views

What Is the difference between the testnet and the mainnet?

I have been seeing some questions about the testnet but what is the testnet? Is the mainnet the one we normally use? What is the difference?
2
votes
0answers
640 views

Is there any testnet faucet site that sends out to bech32?

I am writing a wallet for the far future and I am planning to completely drop the support for receiving to P2PKH addresses. I don't want to add P2SH over P2WPKH either.
2
votes
2answers
267 views

Can I do a replay attack to spend my testnet bitcoin on the mainnet?

I think it would be possible to create a legitimate seeming transaction on the Bitcoin testnet that the Bitcoin mainnet would accept. I've read a bit about the ETC replay attacks, and it seems like ...
2
votes
3answers
1k views

Selling Test bitcoin

I have a random and maybe crazy question. Can I sell test coins? Someone recently told me that Advanced Market Terminal is buying them. It is strange to me Since they should hold no value.
2
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1answer
2k views

Why must generated coins mature 120 blocks before they can be spent?

I mine bitcoin testnet blocks and I find some blocks with difficulty 1. Some examples: I mined these blocks: Block 1 Block 2 Why must generated coins mature 120 blocks before they can be spent?
1
vote
1answer
430 views

Minimum funds required in a channel in Lightning?

I have noticed that, I cannot exhaust the funds in my channel to one side in lnd. I understand this makes sense so as to have some punishment in case of fraud, but I cannot find the reason for the ...
1
vote
1answer
112 views

Height mismatch between bitcoin-qt and bitcoin explorers

I am running bitcoin-qt on the testnet. The count of the last block is 787794 which is way ahead of what I see on blockchain explorers such as https://test.webbtc.com/, which shows the last block as ...
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
588 views

Running two bitcoind instances for different nets

Is it possible to run two separate bitcoind instances on one system at the same time, one for mainnet, other for 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
284 views

Are all the *coin networks consistent in which script actions are permitted and disabled?

The reference Bitcoin client disables several script commands (the programming within a transaction) due to possible implementation issues in the network. I think it's possible that a forked client ...
3
votes
1answer
3k views

How can I get more than 1 BTC on testnet?

The only way I know of to get testnet coins is through faucets such as the following. https://testnet-faucet.com/btc-testnet/ https://testnet-faucet.mempool.co/ https://kuttler.eu/en/bitcoin/btc/...
3
votes
1answer
3k views

How to establish connection for mining testnet blocks on newly created altcoin

I was trying to clone an altcoin for educational purposes. I am total newby and I've got some plans to implement different PoW and continue working on cryto-currencies. I followed the cloning guide ...
2
votes
2answers
947 views

How do I run a headless testnet on OS X?

I'm trying to develop some applications and need bitcoind, but can't seem to find a recent version. Posts seem to indicate that it's incorporated into Bitcoin-Qt, but I don't want to run a GUI just ...
2
votes
1answer
3k views

NBitcoin: signing a transaction in TestNet

I am using the NBitcoin Library to program a simple Bitcoin Transfer Program in C#. The Program will take the coins from a Transaction ID and then Transfer it to a Destination Wallet Address The ...
2
votes
1answer
4k views

How can I do CPU mining on testnet?

I'm trying to do cpu mining on testnet to debug coinbase transactions in my application. Tried running GUI miner, I get the below output: 2014-07-31 11:31:51: Running command: poclbm.exe testnetuser:...
1
vote
1answer
61 views

How to test RBF on Testnet?

I'd like to do RBF testing on testnet. I'd like to simulate a transaction with too-low fees, aka "stuck" transaction, and then RBF it in various ways. Problem is, all testnet transactions ...
1
vote
1answer
68 views

Why is the source code fee calculated higher than the current bitcoin fee amount?

In python bit (https://github.com/ofek/bit/), when sending a message, it is properly 80 bytes or less (https://developer.bitcoin.org/devguide/transactions.html) fee is If it is a 4-byte character ...
1
vote
1answer
3k views

Practical difference between mainnet and testnet

I managed to write a piece of code that generates a bitcoin address and creates a transaction. I would like to make some tests on the testnet but it seems to lack some documentation. So far I figured ...