ocean-subgraph/src/mappings/fixedRateExchange.ts

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import { BigInt, Address, BigDecimal } from '@graphprotocol/graph-ts'
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import {
ExchangeActivated,
ExchangeAllowedSwapperChanged,
ExchangeCreated,
ExchangeDeactivated,
ExchangeMintStateChanged,
ExchangeRateChanged,
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Swapped,
PublishMarketFeeChanged,
TokenCollected
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} from '../@types/templates/FixedRateExchange/FixedRateExchange'
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import {
FixedRateExchange,
FixedRateExchangeSwap,
FixedRateExchangeUpdate
} from '../@types/schema'
import {
getFixedRateExchange,
getUpdateOrSwapId,
getFixedRateGraphID,
updateFixedRateExchangeSupply
} from './utils/fixedRateUtils'
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import { weiToDecimal } from './utils/generic'
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import { addFixedRateExchange, addFixedSwap } from './utils/globalUtils'
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import { getToken } from './utils/tokenUtils'
import { getUser } from './utils/userUtils'
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export function handleExchangeCreated(event: ExchangeCreated): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = new FixedRateExchange(fixedRateId)
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const user = getUser(event.params.exchangeOwner.toHexString())
fixedRateExchange.owner = user.id
fixedRateExchange.contract = event.address.toHexString()
fixedRateExchange.exchangeId = event.params.exchangeId.toHexString()
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fixedRateExchange.datatoken = getToken(event.params.datatoken, true).id
fixedRateExchange.baseToken = getToken(event.params.baseToken, false).id
fixedRateExchange.datatokenSupply = BigDecimal.zero()
fixedRateExchange.baseTokenSupply = BigDecimal.zero()
fixedRateExchange.datatokenBalance = BigDecimal.zero()
fixedRateExchange.baseTokenBalance = BigDecimal.zero()
fixedRateExchange.totalSwapValue = BigDecimal.zero()
fixedRateExchange.active = false
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fixedRateExchange.price = weiToDecimal(
event.params.fixedRate.toBigDecimal(),
BigInt.fromI32(18).toI32()
)
fixedRateExchange.createdTimestamp = event.block.timestamp.toI32()
fixedRateExchange.tx = event.transaction.hash.toHex()
fixedRateExchange.block = event.block.number.toI32()
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fixedRateExchange.save()
addFixedRateExchange()
updateFixedRateExchangeSupply(event.params.exchangeId, event.address)
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}
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export function handleRateChange(event: ExchangeRateChanged): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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const newExchangeUpdate = new FixedRateExchangeUpdate(
getUpdateOrSwapId(event.transaction.hash.toHex(), fixedRateId)
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)
newExchangeUpdate.oldPrice = fixedRateExchange.price
newExchangeUpdate.createdTimestamp = event.block.timestamp.toI32()
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newExchangeUpdate.tx = event.transaction.hash.toHex()
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newExchangeUpdate.block = event.block.number.toI32()
newExchangeUpdate.exchangeId = fixedRateId
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fixedRateExchange.price = weiToDecimal(
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event.params.newRate.toBigDecimal(),
BigInt.fromI32(18).toI32()
)
newExchangeUpdate.newPrice = fixedRateExchange.price
newExchangeUpdate.save()
fixedRateExchange.save()
}
export function handleMintStateChanged(event: ExchangeMintStateChanged): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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fixedRateExchange.withMint = event.params.withMint
fixedRateExchange.save()
}
export function handleActivated(event: ExchangeActivated): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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const newExchangeUpdate = new FixedRateExchangeUpdate(
getUpdateOrSwapId(event.transaction.hash.toHex(), fixedRateId)
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)
newExchangeUpdate.exchangeId = fixedRateId
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newExchangeUpdate.oldActive = fixedRateExchange.active
newExchangeUpdate.newActive = true
newExchangeUpdate.createdTimestamp = event.block.timestamp.toI32()
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newExchangeUpdate.tx = event.transaction.hash.toHex()
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newExchangeUpdate.block = event.block.number.toI32()
fixedRateExchange.active = true
newExchangeUpdate.save()
fixedRateExchange.save()
}
export function handleDeactivated(event: ExchangeDeactivated): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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const newExchangeUpdate = new FixedRateExchangeUpdate(
getUpdateOrSwapId(event.transaction.hash.toHex(), fixedRateId)
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)
newExchangeUpdate.oldActive = fixedRateExchange.active
newExchangeUpdate.newActive = false
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newExchangeUpdate.exchangeId = fixedRateId
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newExchangeUpdate.createdTimestamp = event.block.timestamp.toI32()
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newExchangeUpdate.tx = event.transaction.hash.toHex()
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newExchangeUpdate.block = event.block.number.toI32()
fixedRateExchange.active = false
newExchangeUpdate.save()
fixedRateExchange.save()
}
export function handleAllowedSwapperChanged(
event: ExchangeAllowedSwapperChanged
): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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const newExchangeUpdate = new FixedRateExchangeUpdate(
getUpdateOrSwapId(event.transaction.hash.toHex(), fixedRateId)
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)
newExchangeUpdate.createdTimestamp = event.block.timestamp.toI32()
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newExchangeUpdate.tx = event.transaction.hash.toHex()
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newExchangeUpdate.block = event.block.number.toI32()
newExchangeUpdate.oldAllowedSwapper = fixedRateExchange.allowedSwapper
newExchangeUpdate.exchangeId = fixedRateId
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fixedRateExchange.allowedSwapper = event.params.allowedSwapper.toHex()
newExchangeUpdate.newAllowedSwapper = fixedRateExchange.allowedSwapper
newExchangeUpdate.save()
fixedRateExchange.save()
}
// TODO: implement market fee, opf fee
export function handleSwap(event: Swapped): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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const swap = new FixedRateExchangeSwap(
getUpdateOrSwapId(event.transaction.hash.toHex(), fixedRateId)
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)
swap.createdTimestamp = event.block.timestamp.toI32()
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swap.tx = event.transaction.hash.toHex()
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swap.block = event.block.number.toI32()
swap.exchangeId = fixedRateId
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swap.by = getUser(event.params.by.toHex()).id
// we need to fetch the decimals of the base token
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const baseToken = getToken(
Address.fromString(fixedRateExchange.baseToken),
false
)
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swap.baseTokenAmount = weiToDecimal(
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event.params.baseTokenSwappedAmount.toBigDecimal(),
BigInt.fromI32(baseToken.decimals).toI32()
)
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swap.dataTokenAmount = weiToDecimal(
event.params.datatokenSwappedAmount.toBigDecimal(),
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BigInt.fromI32(18).toI32()
)
swap.save()
updateFixedRateExchangeSupply(event.params.exchangeId, event.address)
if (event.params.tokenOutAddress.toHexString() == fixedRateExchange.baseToken)
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addFixedSwap(
event.params.tokenOutAddress.toHexString(),
swap.dataTokenAmount
)
else addFixedSwap(fixedRateExchange.baseToken, swap.baseTokenAmount)
// update datatoken lastPriceToken and lastPriceValue
const datatoken = getToken(
Address.fromString(fixedRateExchange.datatoken),
true
)
datatoken.lastPriceToken = fixedRateExchange.baseToken
datatoken.lastPriceValue = fixedRateExchange.price
datatoken.save()
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}
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export function handlePublishMarketFeeChanged(
event: PublishMarketFeeChanged
): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
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)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
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if (fixedRateExchange) {
fixedRateExchange.publishMarketFeeAddress =
event.params.newMarketCollector.toHexString()
fixedRateExchange.publishMarketSwapFee = weiToDecimal(
event.params.swapFee.toBigDecimal(),
BigInt.fromI32(18).toI32()
)
fixedRateExchange.save()
}
}
export function handleTokenCollected(event: TokenCollected): void {
const fixedRateId = getFixedRateGraphID(
event.params.exchangeId.toHexString(),
event.address
)
const fixedRateExchange = getFixedRateExchange(fixedRateId)
if (event.params.token.toHexString() == fixedRateExchange.baseToken) {
const baseToken = getToken(event.params.token, false)
fixedRateExchange.baseTokenBalance =
fixedRateExchange.baseTokenBalance.minus(
weiToDecimal(event.params.amount.toBigDecimal(), baseToken.decimals)
)
fixedRateExchange.save()
}
}