101 lines
3.0 KiB
Solidity
101 lines
3.0 KiB
Solidity
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// SPDX-License-Identifier: UNLICENSED
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pragma solidity =0.7.6;
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pragma abicoder v2;
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import '../libraries/Oracle.sol';
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contract OracleTest {
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using Oracle for Oracle.Observation[65535];
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Oracle.Observation[65535] public observations;
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uint32 public time;
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int24 public tick;
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uint128 public liquidity;
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uint16 public index;
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uint16 public cardinality;
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uint16 public cardinalityNext;
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struct InitializeParams {
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uint32 time;
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int24 tick;
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uint128 liquidity;
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}
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function initialize(InitializeParams calldata params) external {
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require(cardinality == 0, 'already initialized');
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time = params.time;
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tick = params.tick;
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liquidity = params.liquidity;
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(cardinality, cardinalityNext) = observations.initialize(params.time);
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}
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function advanceTime(uint32 by) public {
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time += by;
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}
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struct UpdateParams {
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uint32 advanceTimeBy;
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int24 tick;
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uint128 liquidity;
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}
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// write an observation, then change tick and liquidity
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function update(UpdateParams calldata params) external {
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advanceTime(params.advanceTimeBy);
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(index, cardinality) = observations.write(index, time, tick, liquidity, cardinality, cardinalityNext);
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tick = params.tick;
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liquidity = params.liquidity;
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}
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function batchUpdate(UpdateParams[] calldata params) external {
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// sload everything
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int24 _tick = tick;
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uint128 _liquidity = liquidity;
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uint16 _index = index;
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uint16 _cardinality = cardinality;
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uint16 _cardinalityNext = cardinalityNext;
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uint32 _time = time;
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for (uint256 i = 0; i < params.length; i++) {
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_time += params[i].advanceTimeBy;
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(_index, _cardinality) = observations.write(
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_index,
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_time,
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_tick,
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_liquidity,
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_cardinality,
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_cardinalityNext
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);
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_tick = params[i].tick;
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_liquidity = params[i].liquidity;
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}
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// sstore everything
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tick = _tick;
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liquidity = _liquidity;
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index = _index;
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cardinality = _cardinality;
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time = _time;
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}
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function grow(uint16 _cardinalityNext) external {
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cardinalityNext = observations.grow(cardinalityNext, _cardinalityNext);
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}
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function observe(uint32[] calldata secondsAgos)
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external
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view
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returns (int56[] memory tickCumulatives, uint160[] memory secondsPerLiquidityCumulativeX128s)
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{
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return observations.observe(time, secondsAgos, tick, index, liquidity, cardinality);
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}
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function getGasCostOfObserve(uint32[] calldata secondsAgos) external view returns (uint256) {
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(uint32 _time, int24 _tick, uint128 _liquidity, uint16 _index) = (time, tick, liquidity, index);
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uint256 gasBefore = gasleft();
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observations.observe(_time, secondsAgos, _tick, _index, _liquidity, cardinality);
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return gasBefore - gasleft();
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}
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}
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