Release notes
Deprecates classic exchanges (and atomic exchanges) of all non-sUSD synths, in favor of a new DynamicSynthRedeemer contract that allows for synth redemption at the Chainlink price multiplied by a discount rate.
SIP-2059: Legacy Spot Synth Migration
Audit: https://iosiro.com/audits/synthetix-acrab-release-smart-contract-audit