Zcoin v0.13.8.1 Sigma

PLEASE DO NOT DOWNLOAD THIS VERSION FOR PRODUCTION DEPLOYMENT

v013.8.1 will be repalced by v0.13.8.2 due to change in Sigma generators to allow public verifiability of randomness of the generators.

Instructions

This is a mandatory upgrade for all users, Znodes, mining pools and exchanges to enable our Sigma privacy protocol. Hard fork and Sigma functionality occurs on block 182030 (approximately 23 July 2019)

Sigma functionality will remain greyed out until hard fork date.

Please note that this release uses a new wallet format which will not be backward compatible. Please backup your wallet prior to updating to this version for safety!

A reindex is not required unless you upgrade past the hard fork date.

Changelog

• Sigma privacy protocol replacing Zerocoin
• Sigma mints are backed up using HD seed key.
• New QT GUI to simplify Sigma mints/spends
• MTP verification performance improved by 20-30%
• Will detect unspent Zerocoin mints and prompt to remint to Sigma mints

Binaries

• SHA256 Hashes:
  • Linux: 085ef27e1f2f5da79a9934a9055d2996ee6b78ad6263c602bd20ffb7fdc7f6e3
  • macOS: 48d7943601fd35a2e301ee7475ed7351fae264d500a962d417c21639f03cf3d0
  • Windows Installer: a48857d594750d7c18adccf555a159ff577ebf7735dad3b9d6cd7af3d30cdc8f
  • Windows exe: 83888ff29abf359cb995056ba0a6b34500e1f395901f43329764d142f346af93
• The signatures can be verified with this public key.

v0.13.8.1 Release Candidate 1

Instructions

This is a release candidate and if testing passes, this will become the final release.

Hard fork on block 182030

If you wish to use this on your mainnet wallet, please remember to backup your wallet first by going to File>Backup. We will not be responsible should any funds be lost.

Changelog

• HD mints refactored and cleaned up
• MTP verification performance improved by 20-30%
• Added wallet unlock prompt when reminting

Known Issues

• In rare cases where the old wallet has a lot of unconfirmed mints, wallet space on disk may increase after upgrade. This doesn't affect functionality but it is recommended to still keep the old wallet as well.
• Minting Sigma from console displays mint transactions on transaction list showing the individual mints.
• When upgrading and zapwallettxes=1 is used, old Zerocoin transactions are dated wrong. zapwallettxes=2 will rectify this.

Binaries

• SHA256 Hashes:
  • Linux: 202b8d97fd9b22ae365e84c2e9decc86bc8de1a2b23890b5b7d629a07c702ec4
  • macOS: ab83765800ad0d9b8ce04a5b7a03ab31958102f75b0a2ef6501d305444583281
  • Windows Installer: 237ba501952c7a2ab365659dcda1b44bc3758b7a863af3cd14eb272b12e7fa0f
  • Windows exe: 158c6f867b28d0b54d012ea2c266d5f477c80a2437ccd768876a7342d6b65cc9
• The signatures can be verified with this public key.

Zcoin v0.13.8.1 Beta 16

THIS IS FOR TESTNET USE ONLY

Do not use this on mainnet as it will break your wallet.

Note that once you migrate to this wallet, you cannot downgrade versions any longer.
We recommend deleting your old testnet3 folder in your data directory before beginning.

Run with testnet=1 in zcoin.conf or with -testnet switch in command line
For example:
./zcoin-qt -testnet
or for Windows
./zcoin-qt.exe -testnet

As this version requires reindexing, it is recomended to start it proactively in the reindexing mode for the first time only:
./zcoin-qt.exe -testnet -reindex

Testnet Resources

Explorer
Faucet
Bootstrap

Changelog

• GUI display fixes
• RPC fixes
• Zerocoin remint to Sigma improvements
• Improved wallet load time

Binaries

• SHA256 Hashes:
  • Linux: 810101e06792539ea2c053a8cbe1df36734867d63b2ff9203290e5783d8a10bc
  • macOS: ee9f678695cae8bce3d6133d89679b33981982d4d2fb8f4588ee5caa50f24acc
  • Windows Installer: bd098478f139ee257ccd9ac335b88e611c78b4d4810fc26d001d8a21896f83b3
  • Windows exe: c823b36c094e5ae6d9a51ad34c0fa6420e790a43e7aa13334775cee78b3725bc
• The signatures can be verified with this public key.

Zcoin v0.13.8.1 Beta 15

THIS IS FOR TESTNET USE ONLY

Do not use this on mainnet as it will break your wallet.

Note that once you migrate to this wallet, you cannot downgrade versions any longer.
We recommend deleting your old testnet3 folder in your data directory before beginning.

Run with testnet=1 in zcoin.conf or with -testnet switch in command line
For example:
./zcoin-qt -testnet
or for Windows
./zcoin-qt.exe -testnet

As this version requires reindexing, it is recomended to start it proactively in the reindexing mode for the first time only:
./zcoin-qt.exe -testnet -reindex

Testnet Resources

Explorer
Faucet
Bootstrap

Changelog

• Added safety switch for Sigma transactions
• Added coin control for mints and spends
• Added 0.05 and 25 denominations
• Conversion of Zerocoin mints to Sigma mints
• Updated splash screen
• HD Key derivation of mints

Binaries

• SHA256 Hashes:
  • Linux: 82b4773380ed26dce121b1d1c54909d7b24e7e6e51529f877e59a043317cd667
  • macOS: ee5e480816e4e14a9dd28f505e271d668f26aab4a47f797ec344124deea6f53a
  • Windows Installer: 73b386cc95ac7bb3a797b0fe2fb3943da9385b71daaddec3b07f37c2b0ae6f4e
  • Windows exe: eb2df655520f7828369ba80624e144c48cc920dd4aedf0445a0409784fa2bb87
• The signatures can be verified with this public key.

Zcoin 0.13.7.10

Instructions

For Users and Znodes

Please update as this release fixes the issues of resetting all wallet txes time and slow startup which few user may observe.

If you were on 0.13.7.9 and your transaction list had wrong ordering or slow startup, please restore the correct order by running your wallet once with -zapwallettxes=2. All the consecutive runs (without -zapwallettxes=2) will show normal performance. To learn how to exactly add this parameter to the startup command, please check our article on how to reindex your wallet and replace the -reindex with the -zapwallettxes=2 parameter instead.

Changelog

• Fixes slow startup issue
• Fixes wrong transaction ordering

Binaries

• SHA256 Hashes:
  • Linux: 04b11d4bed070c0131e3b546e5ebdddf174121dd6f39cc02f7f241bc56fb3a8c
  • macOS: fd25da49b1e99676e65f0cad911877736712f7c6faaf1d579ffdc07cae07deb5
  • Windows Installer: 25be8d9493ac6fbef5aff2bdbc2367cfa5e17b7819803cec0ac9d30606d8fcf8
  • Windows exe: 3f9b49b7eb800deeaa26158dc1f11c7488d6c03e8c20c35f9dac788cc78ce13b

Zcoin 0.13.7.9

Instructions

As per our previous disclosure, this is a mandatory security update to disable Zerocoin until Sigma is ready to roll out.

Existing Zerocoin mints will not be lost and there will be a method to recover them once Sigma is launched.

For Users and Znodes

Please update as soon as possible. Hard fork happens at Block 157,000 in approximately 2 days time.

Changelog

• Disable Zerocoin mints and spends in preparation for Sigma

Known Issues

• Slow wallet startup
• Transactions show wrong date and is sorted wrongly

A maintenance release will be made soon.

Binaries

• SHA256 Hashes:
  • Linux: 17a2c173583b0e3eb51db0f049592b646d82fc5b3ac3979a143c25ae38f5e2a8
  • macOS: 5b60dc414b60edde3298a621f3407e167495314affe5dbc9b5b0a1d150606e14
  • Windows Installer: d990a2a50010b4bede79d1bb5be295994f158bbac5ea6cdbda9d9716448a21b0
  • Windows exe: 5b95f0bafd648eba2f27f4a7dc2ad00bb9d02daa36fe992e8827bccafee84584

Zcoin 0.13.7.7

Instructions

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

For Users

This release adjusts the fee estimation moving average parameters to the tx rate of Zcoin. For the change to take effect it is necessary to delete the fee_estimates.dat file from the data directory and wait 1-2 hours to gather the necessary statistics.

For Znode owners

Please update to the latest code as the changes allow for ignoring outdated Znodes. It is not strictly mandatory but is recommended.

Changelog

• Changed the moving average params for estimatefee to work on a smaller data (Important Do not forget to remove the fee_estimates.dat file)
• Prohibit pre-0.13.7.* version Znodes from connecting
• Multiple improvements over the automatic tests

Binaries

• SHA256 Hashes:
  • Linux: efcb949f55ec4f1b2764aacccb12420ad22d9b759d4b4554d682563bcb4792d4
  • macOS: 83d5a1cc26118c97ec615e548b51da482558bc95811df0deedf48ed7eace2ada
  • Windows Installer: 6fd7708363de1925343363c9c7ecdab09692a004d5115adf0e4f300c31a092f2
  • Windows exe: 6b047f8485f906d32d7ccbfd84371510d9648792d9824ccf0598acdb0bcdfb7d
• The signatures can be verified with this public key.

v0.13.7.6

Instructions

Mandatory Upgrade

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

For Users

This is a mandatory upgrade. Please upgrade to 0.13.7.6.

For Znode owners

Even if you have previously upgraded to a 0.13.7.x version, including 0.13.7.5, please upgrade to 0.13.7.6.

For guidance on how to upgrade your Znode, please refer to: https://zcoin.io/znode-upgrade-guide/

For mining pools

Please do update pools to 0.13.7.6 as soon as possible as it contains an important fix.

Changelog

• Fixed duplicate Zerocoin spends when doing multiple input
• Added additional checks in mempool

Binaries

• Version: v0.13.7.6
• SHA256 Hashes:
  • Linux: d1567283a4c530ef5a9297857d47c17541be182f5feabb3e2ce607c0d1a67511
  • macOS: 490b2f94f47844c6a1a54efc6997434984aaf300b1ab1bb9cf2e530ff0b1f60d
  • Windows Installer: d18c327d160ff6af1bfd5c50f56f5936887d24099dae6c0a61bcd3ada1c81b11
  • Windows exe: 139174b6efd06a5ad66d5e2498fb999a6598e0b31b75b5004434d09fb43beb2a
• The signatures can be verified with this public key.

v0.13.7.5: Fix for stuck nodes after switch to MTP (#323)

Instructions

Mandatory Upgrade

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

For Users

This is a mandatory upgrade. Please upgrade to 0.13.7.5 as soon as possible as previous versions have a sync bug.

For Znode owners

Even if you have previously upgraded to a 0.13.7.x version, please upgrade to 0.13.7.5 as soon as possible, regardless which version you are on.

If your Znode appears to be in NEW_START_REQUIRED state or if an abnormally high number of other notes seem to be in that state, please stop zcoind, delete zncache.dat and znpayments.dat from the .zcoin folder, and start the daemon again.

For guidance on how to upgrade your Znode, please refer to: https://zcoin.io/znode-upgrade-guide/

For mining pools

Please do update pools to 0.13.7.5 as it contains a difficulty fix.

Changelog

• Sets the block time interval to 5 minutes at block 118600
• Fixes a bug with difficulty calculation

Binaries

• Version: v0.13.7.5
• SHA256 Hashes:
  • Linux: d056f8944f75f0d662c7f7ed6ed2f82bf669ee440f1d29c9533c9bc57d53e9ba
  • macOS: 3e27b9ac3c3073dc1987c4d3d25d67daf077a2b731906fe777c7e7d57665e2c8
  • Windows Installer: 2875e1dcc8679dafe1d567f146d0a6b9fb0bd65b0a747bd0608f2699299422b8
  • Windows exe: 1cc568e662a17e682c472c0c6ceb2fb3775651a2835da0374bbc202b922732d1
• The signatures can be verified with this public key.

v0.13.7.4

Instructions

Important Upgrade

Please backup your wallet before upgrading to this version. To do this, navigate to File > Backup Wallet and save the file to a secure location.

For Users

Client versions older than 0.13.7.1 will stop working with the hard fork. However 0.13.7.4 contains a lot of bug fixes which include huge performance and bandwidth improvements so is highly recommended.

For Znode owners

If you do not upgrade your Znode, you will stop receiving rewards after the hard fork. We highly recommend updating to 0.13.7.4 to greatly reduce bandwidth consumption even if you're on 0.13.7.3. As we are aware that many Znodes are on budget VPS providers, this is important to prevent overage charges.

A new Znode start should not be required.

For guidance on how to upgrade your Znode, please refer to: https://zcoin.io/znode-upgrade-guide/

For mining pools

Please update pools before December 10th 2018. We highly recommend using 0.13.7.4 which has bandwidth and performance improvements.

Changelog

• Changes sync to greatly reduce bandwidth consumption found in earlier 13.7 releases
• Sync speed increased by 3x.

Binaries

• Version: v0.13.7.4
• SHA256 Hashes:
  • Linux: 9e486562c195e4d96d15a868ba948f53e3e9ecf3622dc52b6efae1be2c5753e5
  • macOS: dfbd7a44ba930ffcc11827dcf9da0ca0c2e14fb0a2ff890ab99949436a12d7c7
  • Windows Installer: 3bab9d1bcc364180898edb114c586da630a5e9462044f49b229fa10a991b7ba2
  • Windows exe: d3c8370b6b1e33c6eeb67bb2efc7bb5b4dc1719e4178293a03300813e28ee876
• The signatures can be verified with this public key.