How to change rate/price of a token in Crowdsale?

abcoathup · December 2, 2020, 3:59am

There is an IncreasingPriceCrowdsale in OpenZeppelin Contracts 2.x that you could use for inspiration.

OpenZeppelin/openzeppelin-contracts/blob/v2.5.1/contracts/crowdsale/price/IncreasingPriceCrowdsale.sol

pragma solidity ^0.5.0;

import "../validation/TimedCrowdsale.sol";
import "../../math/SafeMath.sol";

/**
 * @title IncreasingPriceCrowdsale
 * @dev Extension of Crowdsale contract that increases the price of tokens linearly in time.
 * Note that what should be provided to the constructor is the initial and final _rates_, that is,
 * the amount of tokens per wei contributed. Thus, the initial rate must be greater than the final rate.
 */
contract IncreasingPriceCrowdsale is TimedCrowdsale {
    using SafeMath for uint256;

    uint256 private _initialRate;
    uint256 private _finalRate;

    /**
     * @dev Constructor, takes initial and final rates of tokens received per wei contributed.
     * @param initialRate Number of tokens a buyer gets per wei at the start of the crowdsale

This file has been truncated. show original

I put together an example of manually setting a crowdsale rate using this. This code has not been tested or audited. Please appropriately test and audit before using in production.
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How to change rate/price of a token in Crowdsale?

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