Mainnet Ignition v0.14.15 - Recommended Update - Bug fixes

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v0.14.15 - Recommended Update
  • Add EVM global variables to callcontract
  • Update gitian build script
  • Update CentOS build instructions
  • Add exception data to TransactionReceipt
  • Fixed a bug where the gas price could not be parsed correctly on certain platforms (reported by APIS)
  • Fixed a bug where the logs were not reverted on disconnect block in certain cases
• v0.14.14 - Mandatory Update
  • New Qt GUI
  • Fix Qt wallet freeze when syncing from scratch with -logevents or -reindex
  • Fix a bug with cacheUTXO (hardfork at block 100000 in mainnet, 84500 in testnet)
  • Add update checking functionality to Qt wallet
  • Fix a bug in token transfers history dates
  • Fix a bug with searchlogs rpc call
  • Add an extra check when adding token addresses
  • Fix compatibility with boost 1.66
  • Add checkpoints
  • Update nMinimumChainWork and defaultAssumeValid chain params
  • Add minmempoolgaslimit startup argument
  • Add Gitian build signatures
• v0.14.13 - Mandatory Update
  • Fix a callcontract bug which in very specific cases could cause the node to fail to sync the blockchain
  • Add ability to save and restore contract addresses and ABI data
  • Make the token confirmation view data correct
• v0.14.12 - Recommended Update
  • Added option to disable change address usage
  • Fixed bug where heavy RPC usage could cause the wallet to crash
• v0.14.11 - Optional Update
  • Changed our versioning scheme to be consistent and avoid the two version number confusion
  • Add feature to restore wallet in the Qt wallet
  • Add new RPC call "waitforlogs" that is particularly useful for Dapp developers
  • Add long-polling support to the gettransaction RPC call
• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.15-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.15-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.15-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.15-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.15-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• [qtum-0.14.15-osx-unsigned.dmg](https://github.com/qtumproject/qtum/releases/download/mainnet-ignition-v0.14.15/qtum-0.14.15-osx-unsigne...

Mainnet Ignition v0.14.14 - Mandatory Update - New GUI

Update History

• v0.14.14 - Mandatory Update
  • New Qt GUI
  • Fix Qt wallet freeze when syncing from scratch with -logevents or -reindex
  • Fix a bug with cacheUTXO (hardfork at block 100000 in mainnet, 84500 in testnet)
  • Add update checking functionality to Qt wallet
  • Fix a bug in token transfers history dates
  • Fix a bug with searchlogs rpc call
  • Add an extra check when adding token addresses
  • Fix compatibility with boost 1.66
  • Add checkpoints
  • Update nMinimumChainWork and defaultAssumeValid chain params
  • Add minmempoolgaslimit startup argument
  • Add Gitian build signatures
• v0.14.13 - Mandatory Update
  • Fix a callcontract bug which in very specific cases could cause the node to fail to sync the blockchain
  • Add ability to save and restore contract addresses and ABI data
  • Make the token confirmation view data correct
• v0.14.12 - Recommended Update
  • Added option to disable change address usage
  • Fixed bug where heavy RPC usage could cause the wallet to crash
• v0.14.11 - Optional Update
  • Changed our versioning scheme to be consistent and avoid the two version number confusion
  • Add feature to restore wallet in the Qt wallet
  • Add new RPC call "waitforlogs" that is particularly useful for Dapp developers
  • Add long-polling support to the gettransaction RPC call
• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Validate and Reproduce Binaries

Qtum uses a tool called Gitian to make reproducible builds that can be verified by anyone. Instructions on setting up a Gitian VM and building Qtum are provided in doc/gitian-building.md

Hash Validation

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If you would like to validate that the binaries you download are exactly the same as those provided and built by the Qtum team, then you can compare your binaries to the following sha256sum hashes:

Mainnet Ignition v0.14.13 - Mandatory Update - callcontract bugfix, save/restore contract data

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v0.14.13 - Mandatory Update
  • Fix a callcontract bug which in very specific cases could cause the node to fail to sync the blockchain
  • Add ability to save and restore contract addresses and ABI data
  • Make the token confirmation view data correct
• v0.14.12 - Recommended Update
  • Added option to disable change address usage
  • Fixed bug where heavy RPC usage could cause the wallet to crash
• v0.14.11 - Optional Update
  • Changed our versioning scheme to be consistent and avoid the two version number confusion
  • Add feature to restore wallet in the Qt wallet
  • Add new RPC call "waitforlogs" that is particularly useful for Dapp developers
  • Add long-polling support to the gettransaction RPC call
• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.13-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.13-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.13-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.13-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.13-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.13-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.13-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.13-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• [qtum-0.14.13-arm-linux-gnueabihf.tar.gz](https://github.com/qtumproject/qtum/releases/download/mainnet-ignition-v0.14.13/qtum-0.14.13-arm-linux-gnueabih...

Mainnet Ignition v0.14.12 - Fix RPC bugs, Add disable change address option

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v0.14.12 - Recommended Update
  • Added option to disable change address usage
  • Fixed bug where heavy RPC usage could cause the wallet to crash
• v0.14.11 - Optional Update
  • Changed our versioning scheme to be consistent and avoid the two version number confusion
  • Add feature to restore wallet in the Qt wallet
  • Add new RPC call "waitforlogs" that is particularly useful for Dapp developers
  • Add long-polling support to the gettransaction RPC call
• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.12-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.12-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.12-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.12-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.12-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.12-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.12-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.12-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.12-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• [qtum-0.14.12-aarch64-linux-gnu.tar.gz](https://github.com/qtumproject/qtum/releases/download/mainnet-ignition-v0.14.12/q...

Mainnet Ignition v0.14.11 - Wallet restore feature and new RPC calls

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v0.14.11 - Optional Update
  • Changed our versioning scheme to be consistent and avoid the two version number confusion
  • Add feature to restore wallet in the Qt wallet
  • Add new RPC call "waitforlogs" that is particularly useful for Dapp developers
  • Add long-polling support to the gettransaction RPC call
• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.11-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.11-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.11-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.11-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.11-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.11-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.11-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.11-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.11-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.11-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, the...

Mainnet Ignition v1.1.4 - Event Logging Bug Fix

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v1.1.4 - Recommended update
  • Fixed a bug that would cause syncing to stop
  • Fixed a bug that would cause the wallet to crash when using -logevents
• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.10-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.10-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.10-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.10-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.10-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.10-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.10-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.10-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.10-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.10-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, there are also versions that include debug symbols. These are useful for developers, but will run slower and are significantly larger to download.

Build Qtum Core

If you want to build it from source, it's recommended to follow the specific "build" documentation for your platform. Bu...

Mainnet Ignition v1.1.3 - Qtum QRC Token Support (Important Bug Fix!)

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v1.1.3 - Highly recommended update
  • Fixed a bug that caused contact addresses to show in receive token address dropdown
• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer
• Unofficial Raspberry Pi Web UI

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.9-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.9-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.9-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.9-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.9-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.9-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.9-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.9-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.9-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.9-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, there are also versions that include debug symbols. These are useful for developers, but will run slower and are significantly larger to download.

Build Qtum Core

If you want to build it from source, it's recommended to follow the specific "build" documentation for your platform. But mostly it boils down to the following:

1. Clone the qtum source code and cd into qtum

    git clone --recursive https://github.com/qtumproject/qtum.git
    cd qtu...
   

Mainnet Ignition v1.1.2 - Qtum QRC Token Support (bugfixes)

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v1.1.2 - Optional update, but recommended if using QRC tokens
  • Fixed a bug with token transactions where the transaction ID displayed was incorrect in the Qt wallet
  • Allow adding 0 balance addresses as the token receiver in the Qt wallet
• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.8-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.8-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.8-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.8-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.8-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.8-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.8-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.8-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.8-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.8-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, there are also versions that include debug symbols. These are useful for developers, but will run slower and are significantly larger to download.

Build Qtum Core

If you want to build it from source, it's recommended to follow the specific "build" documentation for your platform. But mostly it boils down to the following:

1. Clone the qtum source code and cd into qtum

    git clone --recursive https://github.com/qtumproject/qtum.git
    cd qtum
   

2. Build qtum-core:

   Configure and build the headless qtum binaries as well as the GUI (if Qt is found).

   You can disable the GUI build by passing --without-gui to configure.

   ...

Mainnet Ignition v1.1.1 - Qtum QRC Token Support

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v1.1.1: When sending to contracts, the sender address is now the default change address to reduce confusion; fix -salvagewallet so it works with token transactions
• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.7-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.7-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.7-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.7-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.7-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.7-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.7-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.7-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.7-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.7-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, there are also versions that include debug symbols. These are useful for developers, but will run slower and are significantly larger to download.

Build Qtum Core

If you want to build it from source, it's recommended to follow the specific "build" documentation for your platform. But mostly it boils down to the following:

1. Clone the qtum source code and cd into qtum

    git clone --recursive https://github.com/qtumproject/qtum.git
    cd qtum
   

2. Build qtum-core:

   Configure and build the headless qtum binaries as well as the GUI (if Qt is found).

   You can disable the GUI build by passing --without-gui to configure.

   ./autogen.sh
   ./configure
   make
   

3. It is recommended to build and run the unit tests to ensure everything is working correctly:

   make check
   

If you encounter an error like:

make[2]: *** No rule to make target ‘c...

Mainnet Ignition v1.1 - Qtum QRC Token Support

About Qtum and Mainnet Ignition

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. For more general information about Qtum as well as links to join our community, go to https://qtum.org

Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. There will be a testnet setup soon for developers, in the meantime you can use -regtest mode for testing needs. We will announce details about the token swap from QTUM ERC20 coins to QTUM mainnet tokens soon, watch our website for details about that.

The major features implemented in Qtum Ignition include:

1. The Ethereum Virtual Machine, which allows for compatibility with most existing Solidity based smart contracts.
2. The Smart Staking Protocol is complete, which is an optimized Proof of Stake implementation designed for a smart contract platform (however, smart contracts can not participate in staking yet).
3. An early and basic smart contract GUI has been implemented that can be used for creating contracts, sending data and Qtum to them, and checking their status by executing them locally. This functionality is similar to Mist's UI right now, but it is still an early version. We will be working on this more to improve it.
4. Regtest mode, which is ideal for developers who wish to create their own private blockchain. It is tuned specifically to make development easier. It will stake blocks automatically every 30 seconds, and can generate proof-of-work blocks instantly as needed.
5. The Decentralized Governance Protocol is completely implemented and functional, which allows certain network parameters to be modified without a fork.

For more technical information for how to start developing with Qtum please read the Guide and also see this tutorial for deploying a simple faucet smart contract (it hasn't yet been updated for Mainnet for obvious reasons, but all the instructions are the same and you can try them in regtest mode)

Note: Qtum Core is considered beta software. We make no warranties or guarantees of its security or stability.

Update History

• v1.1.0: Add GUI support Qtum QRC tokens, allowing full management of tokens on the Qtum blockchain from the Qt wallet
  • Sending to a contract no longer requires ABI data, allowing easy participation in simple crowdsale contracts
• v1.0.4: Fix bug where certain circumstances when staking could cause the displayed balance to be inaccurate until completely redownloading the blockchain.
• v1.0.3: Fix staker bug that reported false messages; slightly increases staking performance; optimize staker parameters; fix white send button in GUI
• v1.0.2: Various UI fixes, minor gas overflow consensus fix, per-txout exploit fix, testnet mode setup and functioning
• v1.0.1: Fixed network magic bytes and minimum version to ensure the main network does not conflict with the Skynet network
• v1.0: Initial release

Reindex Required When Upgrading from v1.0.1

When you first start the Qtum 1.0.2 GUI wallet after using Qtum v1.0.1 it will prompt you that it must reindex the database. This is normal and is a result of switching our internal database format from per-transaction to per-txout. If you use qtumd -daemon it will silently fail to start. You need to use qtumd -daemon -reindex in this case.

Qtum Documentation and Usage Resources

Basic usage resources:

• Official Qtum Usage Guide
• Unofficial Qtum staking tutorial
• Unofficial Qtum staking tutorial on Raspberry Pi
• Unofficial guide for keeping your wallet safe
• Block explorer
• Unofficial block explorer

Development resources:

• Deploying a custom token to Qtum
• Early example faucet contract
• Unofficial Qtum Hello World tutorial

General Info about Qtum:

• Mainnet event AMA
• Qtum's PoS vs CASPER
• Technical article explaining Qtum's PoS model in depth
• Unofficial What is Qtum article

Quickstart

The easiest way to get started with Qtum is to simply download the binaries below. To give a brief breakdown of the different versions available:

Windows

• qtum-0.14.6-win64.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows.
• qtum-0.14.6-win64-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using Windows. This includes an installer and will install Qtum system wide.
• qtum-0.14.6-win32.zip - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. If you have an older Windows computer and don't care about installing Qtum system-wide,
• qtum-0.14.6-win32-setup-unsigned.exe - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 machines using Windows. This includes an installer and will install Qtum system wide. If you have an older Windows computer and want to install Qtum then this is for you.

OSX

• qtum-0.14.6-osx64.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 machines using OSX. If you use a modern Mac and want development tools, this is what you want; we do not support older 32bit or PowerPC based Macs.
• qtum-0.14.6-osx-unsigned.dmg - A version of Qtum-Qt built for 64bit x86 machines using OSX in a .DMG installable format. If you use a modern Mac and aren't a developer, this is what you want; we do not support older 32bit or PowerPC based Macs.

Linux

• qtum-0.14.6-i686-pc-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 32bit x86 PC platforms running Linux. This is probably what you want for older computers running Linux
• qtum-0.14.6-x86_64-linux-gnu.tar.gz - A version of Qtum-Qt, qtumd, and qtum-cli built for 64bit x86 PC platforms running Linux. This is probably what you want for any modern PC or server running Linux
• qtum-0.14.6-arm-linux-gnueabihf.tar.gz - A version of qtumd and qtum-cli built for 32bit ARM platforms using Linux. This includes the Raspberry Pi and many of it's clones
• qtum-0.14.6-aarch64-linux-gnu.tar.gz - A version of qtumd and qtum-cli built for 64bit ARM platforms using Linux

Below in the full list of binaries, there are also versions that include debug symbols. These are useful for developers, but will run slower and are significantly larger to download.

Build Qtum Core

If you want to build it from source, it's recommended to follow the specific "build" documentation for your platform. But mostly it boils down to the following:

1. Clone the qtum source code and cd into qtum

    git clone --recursive https://github.com/qtumproject/qtum.git
    cd qtum
   

2. Build qtum-core:

   Configure and build the headless qtum binaries as well as the GUI (if Qt is found).

   You can disable the GUI build by passing --without-gui to configure.

   ./autogen.sh
   ./configure
   make
   

3. It is recommended to build and run the unit tests to ensure everything is working correctly:

   make check
   

If you encounter an error like:

make[2]: *** No rule to make target ‘cpp-ethereum/utils/libscrypt/b64.c’, needed by ‘cpp-ethereum/utils/libscrypt/libbitcoinconsensus_la-b64.lo’. Stop.

Then you did not checkout the cpp-ethereum submod...