[VPD-1168]: Add BNB Core deprecation interest rate model#682
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Debugger022 wants to merge 2 commits into
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[VPD-1168]: Add BNB Core deprecation interest rate model#682Debugger022 wants to merge 2 commits into
Debugger022 wants to merge 2 commits into
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Deploy a legacy JumpRateModel (300% flat below the 45% kink, 500% max) for the BNB Core pool's Phase-4 market deprecation. A separate legacy contract is required because the isolated-pools JumpRateModelV2 uses a badDebt-aware getBorrowRate/getSupplyRate ABI that legacy VBep20 markets cannot call. The downstream VIP repoints the deprecated markets via _setInterestRateModel.
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Summary
JumpRateModelis required (not the isolated-poolsJumpRateModelV2) because BNB Core's legacy VBep20 markets call a 3-arggetBorrowRate/ 4-arggetSupplyRateABI; the isolated-pools model exposes a badDebt-aware ABI those markets cannot call. Repointing to it would brick interest accrual._setInterestRateModel.Changes
deploy/019-bnbcore-deprecation-irm.ts: hardhat-deploy script for the legacyJumpRateModel. Args base 300% / slope1 0% / jump 363.64% / kink 0.45, BSC blocksPerYear 70,080,000. Gated to bscmainnet/bsctestnet,skipIfAlreadyDeployed, tagBNBCoreDeprecationIRM, with explorer verification on live networks.deployments/bscmainnet/JumpRateModel_base30000bps_slope0bps_jump36364bps_kink4500bps_bpy70080000.json: deployment artifact (deployed at0xc255352947ef3594C45b0Fe8bcB690e51C3D744A).