A permissionless helper contract that allows you to get the aura booster pid for a certain Balancer gauge
The contract makes the assumption that if there are two separate pids for the same gauge, the higher pid takes priority.
gaugeDetails: a struct consisting of
address lpToken, uint8 pid;
poolList[gauge]: A mapping of gaugeDetails structs by gauge
addGauge(uint8 pid): Derives the gauge from the pid by calling booster.poolInfo(pid) and stores the pid+lptoken in poolList(gauge), mapped by gauge
addManyGauges(uint8[] pids): loops through the array of pids and calls addpool for each, note that a supplied pid must not yet be added lest it revert
validateList(uint8 lowerBound, uint8 upperBound) A view function that iterates through the supplied pid ranges to see if any stored pids for a gauge need updating. Returns looks like this:
('0xe2b680A8d02fbf48C7D9465398C4225d7b7A7f87', 99), ('0x0312AA8D0BA4a1969Fddb382235870bF55f7f242', 101)) indicating which gauges need their pid updated
NOTE This is meant to be called offchain by keepers
updatePidForGauge(uint8 pid, address gauge): derives the gauge of supplied pid through booster.poolInfo(pid) and checks the poolList mapping to see if the supplied pid is higher than stored pid and updates it.
updateManyGauges(needUpdate[] list) updates many gauges. list is an array of needUpdate structs `address gauge, uint8 pid'
NOTE This function can take the output directly from validateList()
getLPFromPid(pid): Get the lp token for a certain pid
getPidFromGauge(gauge) looks up gauge in poolList and returns the pid
removeShutdownGauge(pid) removes the mapping in poolList if booster.poolInfo(pid).shutdown ==true and supplied pid matches the stored pid
Some notes:
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Upon deployment, someone will have to populate poolList with all the gauges.
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validateList upper bound must not be more than the max pid of the booster (booster.poolLength())
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line 56 (which checks if a pid has been shutdown) has been edited out for testing purposes
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Pid of 0 does not work because of how solidity defaults an unmapped item to 0. which is fine since 0 is the shutdown aura/weth gauge