Steem Final Release Equality 0.19.1

  • We recommend all witnesses, seed nodes, and anyone else running the witness plugin should update to 0.19.1


    0.19.1 requires reindexing from all previous versions.


    This is a soft release with miscellaneous bug fixes and enhancements.

    Jinja2 Required for Building

    We updated the plugin manifest build scripts and added Jinja2 as a dependency to our build process. See for platform specific instructions. Additionally, CMake 3.2 is required (up from 2.8.12).

    Smooth Bandwidth Algorithm

    There were two big problems with the bandwidth algorithm. The first was an integer overflow that caused max_virtual_bandwidth to be calculated incorrectly. The second was a programmed behavior that caused bandwidth requirements to increase too rapidly for a small increase in traffic. We have implemented a new algorithm for how to calculate global bandwidth requirements that still protects the blockchain under extreme circumstances, but is less aggressive during small deviations from past behavior. Overall, this should improve the user experience when it comes to bandwidth rate limiting. #1257

    Check Memos

    Transfers with the sender's private key information will be rejected with a soft fork. The error message recommends the sender change their keys in such an event. The CLI wallet does a similar check against the sender's keys and the keys in the wallet. #1181

    Fix Delegations in Account by Key Plugin

    The Account by Key plugin now recognizes and tracks accounts that were created with delegation. The problem showed in the CLI wallet when accounts created with delegation could not be found by public key. #1194

    HF19 Cleanup

    There were a number of temporary fields and objects that existed to help transition the blockchain through HF 19. Because those values are cryptographically locked in to the blockchain, we have replaced the temporary fields with constants. #1193

    Account History Filter

    The Account History plugin now supports filtering ops with a mutually exclusive whitelist or blacklist. The config options are history-whitelist-ops and history-blacklist-ops respectively. #301

    Block Production Virtual Op

    Block production now emits a virtual operation that is trackable in account history. #832

    Ignore 0% Interest Virtual Op

    Interest virtual operations are now only emitted if there is a non-zero interest payment #1222

    Out of Memory Error Messages

    When the free space on the memory mapped state file is less than 100 MB, an error message will be displayed every 10 blocks warning of the impending doom and current free space available. #1223

    Log Expiring Transactions

    When transactions expire from the pending state, they will now be logged at the debug level #1215

    Increase p2p Cache Time

    Increased the p2p cache time from 15 to 60 seconds #1242

    Update get_transaction Disable Message

    On Steemit production nodes, we are not supporting the index to return transactions by ID. Previously, get_transaction failed silently by not returning a transaction. The call now returns an error message explaining that the API is disabled. #1213

    Remove Unused APIs

    The following API calls were not in a usable state and we have no plans on supporting them, so they have been removed. set_subscribe_callback set_pending_transaction_callback cancel_all_subscriptions #1197


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