30 lines
1.2 KiB
Solidity
30 lines
1.2 KiB
Solidity
pragma solidity >=0.6.12;
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// Author: Louis Holbrook <dev@holbrook.no> 0826EDA1702D1E87C6E2875121D2E7BB88C2A746
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// SPDX-License-Identifier: AGPL-3.0-or-later
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// File-version: 1
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// Methods to detect tokens that are subject to continuous change, and
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interface ITokenChangeRate {
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// Time unit resolution for rate of change.
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// A value of 0 indicates no rate of change,
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function changeTimeUnit() external view returns(uint256);
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// Rate of change per changeTimeUnit(), signed integer.
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// An effective value of 0 indicates no rate of change.
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function changeRate() external view returns (int256);
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// Number of decimals with which the changeRate is defined.
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// changeRate() should be divided by 10 ** changeRateDecimals() to obtain effective value
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function changeRateDecimals() external view returns(uint8);
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// Timestamp from when rate of change should be applied.
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// A value of 0 indicates no rate of change,
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function changeStartTime() external view returns(uint256);
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// Calculate value with change rate applied for given amount of time units.
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// Will calculate compounded change over the given amount of time units
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function applyChange(int256 _value, uint256 _changeTimeUnits) external view returns(int256);
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}
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