BU Release for Bitcoin Cash (BCH): BUCash


Staff member
Aug 22, 2015
Download the latest Bitcoin Cash compatible release of Bitcoin Unlimited (, April 17, 2018) from:

This release is compatible with the Bitcoin Cash planned protocol upgrade that will take place on May 15th

The main changes of this release are:
  • May 15th 2018 protocol upgrade, at the median time past (MTP) time of 1526400000 (Tue May 15 12:00:00 UTC, 2018) this new features will introduced:
    • OP_RETURN data carrier size increases to 220 bytes
    • Increase the maximum blocksize (EB) to 32,000,000 bytes
    • Re-activate the following opcodes: OP_CAT, OP_AND, OP_OR, OP_XOR, OP_DIV, OP_MOD
    • Activate these new opcodes: OP_SPLIT to replace OP_SUBSTR, OP_NUM2BIN, OP_BIN2NUM
  • New RPC command listtransactionsfrom
  • Add new OP_DATASIGVERIFY (currently disabled)
  • Increase LevelDB performance on Linux 32 bit machine (port from Core)
  • QA enhancements (port from Core)
  • Improve XTHIN machinery by the use of shared txn
  • Greatly improve initial blocks download (IBD) performances
  • Automatically determine a more optimal -dbcache setting if none provided
  • Improve Request Manager functionalities
Release notes: https://github.com/BitcoinUnlimited/BitcoinUnlimited/blob/dev/doc/release-notes/release-notes-bucash1.3.0.0.md

Ubuntu PPA is in the process of being updated.

hat-tip @sickpig for text
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