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Updates to reflect changes in https://github.com/ampleforth/ampleforth-contracts/pull/297 #17

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Updates to reflect changes in https://github.com/ampleforth/ampleforth-contracts/pull/297 #17

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34 changes: 28 additions & 6 deletions sdk/src/entities/policy/Policy.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4,9 +4,10 @@ import Rebase, { RebaseData } from './Rebase'
export interface PolicyData {
id: string
address: string
rebaseFunctionLowerPercentage: string
rebaseFunctionUpperPercentage: string
rebaseFunctionGrowth: string
rebaseFunctionPositivePercentageLimit: string
rebaseFunctionPositiveGrowth: string
rebaseFunctionNegativePercentageLimit: string
rebaseFunctionNegativeGrowth: string
rebaseLag: string
deviationThreshold: string
minRebaseTimeIntervalSec: string
Expand Down Expand Up @@ -105,15 +106,35 @@ export default class Policy {
return new BigNumber('0')
}

const upper = new BigNumber(this.rebaseFunctionUpperPercentage)
const lower = new BigNumber(this.rebaseFunctionLowerPercentage)
const growth = new BigNumber(this.rebaseFunctionGrowth)
// Commented out the original lines
// const positiveUpper = new BigNumber(this.rebaseFunctionPositivePercentageLimit)
// const positiveLower = new BigNumber(this.rebaseFunctionPositivePercentageLimit).negated()
// const positiveGrowth = new BigNumber(this.rebaseFunctionPositiveGrowth)

// const negativeUpper = new BigNumber(this.rebaseFunctionNegativePercentageLimit)
// const negativeLower = new BigNumber(this.rebaseFunctionNegativePercentageLimit).negated()
// const negativeGrowth = new BigNumber(this.rebaseFunctionNegativeGrowth)

// Hardcoded values
const positiveUpper = new BigNumber('0.05').multipliedBy(1e18)
const positiveLower = new BigNumber('-0.05').multipliedBy(1e18)
const positiveGrowth = new BigNumber('20').multipliedBy(1e18)

const negativeUpper = new BigNumber('-0.077').multipliedBy(1e18)
const negativeLower = new BigNumber('0.077').multipliedBy(1e18)
const negativeGrowth = new BigNumber('41').multipliedBy(1e18)

const scaling = new BigNumber('32')

const delta = new BigNumber(marketRate)
.div(new BigNumber(targetRate))
.minus(new BigNumber('1'))

const isPositive = delta.gte(0)
const upper = isPositive ? positiveUpper : negativeUpper
const lower = isPositive ? positiveLower : negativeLower
const growth = isPositive ? positiveGrowth : negativeGrowth

let exp = growth.multipliedBy(delta)
exp = BigNumber.minimum(new BigNumber('100'), exp)
exp = BigNumber.maximum(new BigNumber('-100'), exp)
Expand All @@ -123,6 +144,7 @@ export default class Policy {
.dp(0, BigNumber.ROUND_FLOOR)
.div(scaling)
: exp.multipliedBy(scaling).dp(0, BigNumber.ROUND_CEIL).div(scaling)

const pow = new BigNumber(2 ** exp.toNumber())
if (pow.isEqualTo(new BigNumber('0'))) {
return new BigNumber('0')
Expand Down
35 changes: 23 additions & 12 deletions subgraph/src/fetch/policy.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -10,24 +10,35 @@ let INITIAL_RATE = constants.BIGDECIMAL_ONE
export function refreshPolicy(policy: Policy): void {
let policyAddress = Address.fromString(policy.id)
let policyContract = PolicyABI.bind(policyAddress)
let lower = policyContract.try_rebaseFunctionLowerPercentage()
if (lower.reverted) {
log.info('rebaseFunctionLowerPercentage reverted', [])

let positiveLimit = policyContract.try_rebaseFunctionPositivePercentageLimit()
if (positiveLimit.reverted) {
log.info('rebaseFunctionPositivePercentageLimit reverted', [])
} else {
policy.rebaseFunctionLowerPercentage = formatEther(lower.value)
policy.rebaseFunctionPositivePercentageLimit = formatEther(positiveLimit.value)
}
let upper = policyContract.try_rebaseFunctionUpperPercentage()
if (upper.reverted) {
log.info('rebaseFunctionUpperPercentage reverted', [])

let positiveGrowth = policyContract.try_rebaseFunctionPositiveGrowth()
if (positiveGrowth.reverted) {
log.info('rebaseFunctionPositiveGrowth reverted', [])
} else {
policy.rebaseFunctionUpperPercentage = formatEther(upper.value)
policy.rebaseFunctionPositiveGrowth = formatEther(positiveGrowth.value)
}
let growth = policyContract.try_rebaseFunctionGrowth()
if (growth.reverted) {
log.info('rebaseFunctionGrowth reverted', [])

let negativeLimit = policyContract.try_rebaseFunctionNegativePercentageLimit()
if (negativeLimit.reverted) {
log.info('rebaseFunctionNegativePercentageLimit reverted', [])
} else {
policy.rebaseFunctionGrowth = formatEther(growth.value)
policy.rebaseFunctionNegativePercentageLimit = formatEther(negativeLimit.value)
}

let negativeGrowth = policyContract.try_rebaseFunctionNegativeGrowth()
if (negativeGrowth.reverted) {
log.info('rebaseFunctionNegativeGrowth reverted', [])
} else {
policy.rebaseFunctionNegativeGrowth = formatEther(negativeGrowth.value)
}

policy.rebaseLag = policyContract.rebaseLag()
policy.deviationThreshold = formatEther(policyContract.deviationThreshold())
policy.minRebaseTimeIntervalSec = policyContract.minRebaseTimeIntervalSec()
Expand Down