v2.2.0

Note: This version has been deprecated. A higher version has been released. Please use one of the higher versions to upgrade. The following information is purely historical.

Pre-upgrade Emergency Release

What’s Changed

This is a mandatory update for the upcoming Fort Canning chain upgrade. It contains a key fix that upgrades the protocol over the previous v2.x.x releases that were originally intended node for the next network upgrade . v2.2.0 (this) now effectively replaces all v2.x before it and is the required node.

Fort Canning upgrade is set for block 1367000 (approx. ETA Monday, 15 Nov 2021) on mainnet.

Update of mainnet node to v2.2.0 before the chain upgrade block is REQUIRED.

Key Focus - v2.2.0

• 2.2.0 disables the following RPCs for fort canning network upgrade due, until a later release to enable similar/same features:
  • updatemasternode
  • setforcedrewardaddress
  • remforcedrewardaddress

For Fort Canning

• Native protocol support for decentralised loans. Includes all the foundational blocks for loans, auctions, bids and to bring stock tokens on to the ecosystem. This introduces a new set of protocols and RPCs to interact with the chain. For more information, please read the wiki here.
• Composite swap. Automatically swaps across up-to 3 pool pairs. Example: Directly swap between dBTC to dETH in one atomic step (Tx) through the underlying DFI-BTC and DFI-ETH pools. (#676)
• Improved on-chain mechanics for oracle pricing and fault tolerance with dedicated support for fixed time interval pricing.

Other noteworthy improvements:

• #704: getmasternodeblocks RPC now correctly returns blocks minted by all subnodes.
• #686: spv_refundhtlcall RPC - Gets all HTLC contracts stored in wallet and creates refunds transactions for all that have expired.
• #722: Anchoring cost has now been reduced to BTC dust (minimum possible).
• #752: Tx fees, which were being burnt after Eunos upgrade will now be included in block rewards again from Fort Canning.

Breaking RPC Changes (from 1.8.4)

• #815: listpoolpairs and getpoolpair RPCs now include additional field: rewardLoanPct.
• #711: listaccounthistory RPC now only includes a record if the transaction is trusted (confirmation > 0).

Full Changelog: v1.8.4...v2.2.0

v2.2.0 Specific Info

• Disable updatemasternode, and reward address change @prasannavl (#901)
• Update failing tests for recent changes @Bushstar (#902)
• Use mocktime in deposittovault tests @hidiego (#896)

How to run?

Download and untar the relevant version to your operating system, run bin/defid or bin/defid.exe to start a DeFi Blockchain daemon. The client (CLI) can be found at bin/defi-cli or bin/defi-cli.exe.

DeFi App (GUI) users

If you are running the desktop DeFi App, you do not have to manually update the underlying node as the app will handle it. Check https://github.com/DeFiCh/app/releases for the latest releases.

Testnet Info

The following are informational updates that apply only for development on testnet:

• No new rollback necessary for v2.2.0 if you've already rolled back to the right hash with 2.0.0.
• Testnet has been rolled back to the testnet specific Fort Canning block height (686200) along with the v2.0.0
• Blockhash of testnet 686200: 527ae58ed2a644e907d03a176779b5945a2682c1ef90d7563037cdf65e6a2364

Testnet rollback tips:

$ defi-cli -testnet invalidateblock $(defi-cli -testnet getblockhash 686200)
$ defi-cli -testnet reconsiderblock 527ae58ed2a644e907d03a176779b5945a2682c1ef90d7563037cdf65e6a2364
$ defi-cli -testnet clearbanned

Issues

Please report any issues to [email protected], or reach out to is via Telegram or Reddit.