Testnet is a network separate from bitcoin that allows developers to attempt modifications of the bitcoin protocol safely.

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How to send an invalid transaction for testing purposes?

How could I send an invalid transaction—for testing purposes, such as with testnet or regtest? For example, I would like to to try to double-spend, spend non existent coins, etc.
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Bitcoin soft fork hypothetical issue based off BIP66

Recently I saw BIP66 activation occur on testnet, but then the majority of miners were propogating V2 blocks again, causing 0.10 nodes to reject any v2 blocks - causing a fork between V2 and V3 nodes. ...
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testnet pay per share mining pools

I was wondering if there are any testnet mining pools that are active, or is all of the current hash power on testnet (about 3 Th/s) all from solo miners. I would like to be able to get a bit of ...
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how to tell if a pool is not working

I have been trying to mine on testnet just for fun, and I ran across a testnet mining pool http://testnet.tbdice.org. Using cg miner, I was able to connect to the pool; however all of my shares are ...
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26 views

Where can I access a NXT public testnet node?

Was wondering where can I access a public NXT testnet node?
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1answer
55 views

Running another instance of bitcoin-qt dedicated to testnet/regtest?

Is it possible to run another instance of bitcoin-qt dedicated to testnet/regtest? If so, how do i do this? My question is similar to "Running two bitcoind instances for different nets," but I want ...
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1answer
74 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: ...
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2answers
33 views

Why can't the block size upgrade be trialed on testnet with an organised “stress test”

A stress test was run on mainnet to see the effect of exponential demand in Tx volume. Why can't a testnet "stress test" be organised to look at the implications of the 20Mb block size (and other ...
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1answer
44 views

Why the same confirmed transaction in the Testnet has different block hash and other fields?

Chain.com http://explorer.chain.com/transactions/a4bfb8e21ae3d6232183dfb8ef5fcee8c9b8f223c2d25738e24765a75abd009b Chain.so ...
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1answer
56 views

Why was this transaction allowed on testnet?

I'm a bit confused on how testing stuff for Bitcoin on the testnet currently works. For example, bitcoin core 0.10 enables only 40 bytes in OP_RETURN, but I'm not sure if 0.10 is the latest version ...
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2answers
69 views

Bitcore Testnet API

Does anyone know if Bitcore offer a testnet API to play around with? I'm implementing an Escrow system using the API and Node.js and don't particularly want to use real Bitcoins. Thanks.
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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: ...
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34 views

Armory 0.93 on Testnet: consistent unconfirmed Txs sent from connected Bitcoin-cli (log attached)

Running Armory (0.93.0.82) on Win7 x64 with the following flags: "C:\Program Files (x86)\Armory\ArmoryQt.exe" --testnet --datadir=d:\data\armory\testnet3 --satoshi-datadir="d:\data\bitcoincore" ...
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1answer
74 views

Why am I unable to post two transactions (the second from the change address of the first) in the same block?

I'm attempting to make a transaction on the testnet with an OP_RETURN and a change address in it, and then make a second OP_RETURN transaction from first transaction's change address in the same ...
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79 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 ...
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1answer
109 views

Redeeming OP_SHA256 hash OP_EQUAL (Testnet) Tx

I created the following non-standard Tx on the Testnet3 network: 6b52c981e6814072db77cb755b2633cd126b4ca21501d18ab994531e17a4a813 { hash: ...
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1answer
43 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 ...
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92 views

How can one simulate and analyze attacks on the Bitcoin network?

Are there any other platforms or tools beside TestNet where I can simulate and analyze various attacks like double spending (finney/block withholding attacks etc.)?
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2answers
79 views

bitcoin-0.9.3 won't syncup on TESTNET stuck at height 26859

Downloaded the latest bitcoin core tar ball 0.9.3. New install for test and development. This thread relates only to the TESTNET, I haven't tried on the production network. When launching the bitcoind ...
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45 views

Is it possible to run a simple attack on a previous version of the client in testnet mode?

I need to simulate an attack locally or in testnet (if possible) for academic purpose, on an old and bugged version of the bitcoin core client. I am in posses of test BTC in the last version. I want ...
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1answer
42 views

How do you access the NXT testnet to test out new features of the system?

I downloaded the new nxt platform and want to try out the testnet system for new features. How do you get the testnet running on your local system?
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2answers
62 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.
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577 views

BlockChain.info testnet wallet and API

Does blockchain.info provide wallets and API service for testnet? This information is quite hard to find from their site.
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1answer
63 views

Key exported from BitcoinJ is different from the key shown by bitcoind

I am quite new to Bitcoin. I am trying to use Bitcoinj with regtest mode. I have created the following application: public class TestBitcoinj { private final static BigInteger ONE = new ...
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1answer
93 views

How do I run Armory Testnet on Win7 x64 using Bitcoin Core 0.9.3 using remote datadir?

Trying to use the testnet which I have no problems with using Bitcoin Core 0.9.3 with command: Bitcoin-qt.exe -testnet -datadir=f:\data\bitcoincore But running Armory using the Testnet icon attempts ...
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1answer
67 views

Local Testnet3, where do the new coins get sent to?

I'm trying to setup a local testnet with multiple nodes. Currently I have three nodes, and their mining powers are almost the same. When I use listaccounts RPC call, all the wallets have 0 coins. ...
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107 views

Bitcoin testnet: “Bitcoin is downloading blocks…” and other problem

I'm trying to setup a local testnet with multiple nodes. Currently I have three nodes, and their mining powers are almost the same. Things have been quite ok so far, except some problems that I need ...
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1answer
60 views

Are bitcoin testnet addresses taxed?

Here is a testnet address I've been experimenting with, Here is some test BTC leaving the address, I didn't initiate the transfer though, is this a feature of the testnet to keep the faucets stocked ...
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1answer
319 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 ...
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1answer
135 views

Error pushing hex of tx, generated with bitcoinjs 1.0, on testnet

I'm new to bitcoin programming and decided to give it a try with the release of bitcoinjs-lib 1.0. Here is how I generate the hex for the transaction var bitcoin = require('bitcoinjs-lib'); var key ...
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243 views

creating our own coin - connection refused error

We are trying to create our own currency. We first started with testnet. The aim is to generate a genesis block and testnet did it very well. However, although we had connection between two ...
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1answer
178 views

Tx to a multisig address in testnet not working

i've sent a tx to a newly created multisig address on testnet, but i dont understand why i didnt get the funds yet. What i've done to so far was create 3 separate wallets, and get the 3 pubkeys to ...
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109 views

Which altcoins have testnets?

Bitcoin can be run on a public testnet (by using a different port than the real Bitcoin network). This is very useful for development, because you can test software handling Bitcoin without handling ...
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323 views

RPC calls fail in testnet mode, but not normal mode?

I'm running bitcoind on a debian web server. If I run in normal mode, i.e. "bitcoind -daemon," then it seems to work completely fine. [birdseye]$ ./bitcoind -daemon Bitcoin server starting ...
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813 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 ...
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1answer
159 views

Bitcoind doesn't find transactions / synchronize / update until last block from Testnet

I set up bitcoind as server. It downloads the testnet blockchain but it is inconsistent with public data: http://blockexplorer.com/testnet/q/getblockcount 182951 (As of 18/02/14) And bitcoind ...
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1answer
1k 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 ...
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1answer
145 views

Double spend attempts examples on testnet?

Where can I find some double spend attempts examples on testnet? Can anyone refer me some TXIDs with double spends on testnet? EDIT: I need some example in which an outpoint was intended to be used ...
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395 views

How to use Bitaddress.org and Blockchain.info with Testnet coins?

I was asking myself the same question posed at How to run a bitcoind on a hosting securely? At the above posting, George Pearce provided a good suggestion. However, I have questions but ...
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1answer
220 views

Bitcoin Testnet is not working [closed]

I am new to Bitcoin Development Environment. Trying to setup testnet environment with the help this blog post. Bitcoin Folder ~/.bitcoin $ ls bitcoin.conf chainstate db.log peers.dat blocks ...
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302 views

Cannot synchronize with Bitcoin 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 ...
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2answers
554 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 ...
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1answer
110 views

Looking for testnet coins [duplicate]

Having a hard time getting the amount of testnet coins I need. Anyone know a way of getting a rather large amount of testnet coins? If you can spare some:mvhTdSXUhs812vY5t1StAKohwid5GwALgK
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1answer
168 views

Completely confused with mutisig address and scripts

I used the guide, how to make escrow from bitcoin console. Here are my transactions in testnet: tx1 tx2 I am confused about ScriptPublicKey in tx1: OP_HASH160 ...
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3answers
597 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, ...
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70 views

Nonstandard script - TX rejected

I am experimenting in testnet with nonstandard scripts. There was a transaction, created by me, with the following vout script: OP_HASH256 ...
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1answer
1k views

Easiest way to accept BTC and test

We are building an online game and planning to enable our players to play for bitcoins. Therefore, we need to enable players to deposit and withdraw bitcoins. Which way is the easiest to start ...
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1answer
414 views

dumpwallet always corrupts my wallet

I have repeated this process a few times, always with the same error. In one terminal, ./bitcoind -testnet in another ./bitcoind -testnet getnewaddress mgj4Y8AvckxborhQzqFAhppcGVGFExqJvB ...
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2answers
454 views

Block explorer with testnet raw hex data

Blockchain.info allows you to look at the raw hex of a transaction. But it doesn't have testnet functionality. Blockexplorer allows you to look at testnet, but I can't find a way to show the hex dump. ...
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1answer
469 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 ...