定价

// Calculate tokens received for a given ETH amount
function calculateTokensReceived(
  ethAmount: number,
  currentRaised: number,
  targetEth: number,
  totalSupply: number,
  aggressiveness: number
): number {
  const exponent = 1 / (1 + aggressiveness / 100);
  
  // Calculate supply at current raised
  const currentSupply = totalSupply * 
    Math.pow(currentRaised / targetEth, exponent);
  
  // Calculate supply after purchase
  const newRaised = currentRaised + ethAmount;
  const newSupply = totalSupply * 
    Math.pow(newRaised / targetEth, exponent);
  
  // Tokens received = difference in supply
  return newSupply - currentSupply;
}

// Example usage
const tokens = calculateTokensReceived(
  1,        // 1 ETH purchase
  5,        // 5 ETH already raised
  10,       // 10 ETH target
  1000000,  // 1M total supply
  50        // 50% aggressiveness
);
console.log(`You'll receive ${tokens.toFixed(0)} tokens`);

// Calculate ETH received for selling tokens
function calculateEthReceived(
  tokenAmount: number,
  currentSupply: number,
  currentRaised: number,
  targetEth: number,
  totalSupply: number,
  aggressiveness: number
): number {
  const exponent = 1 / (1 + aggressiveness / 100);
  
  // Calculate new supply after sell
  const newSupply = currentSupply - tokenAmount;
  
  // Calculate corresponding raised amount
  const supplyRatio = newSupply / totalSupply;
  const newRaised = targetEth * 
    Math.pow(supplyRatio, 1 / exponent);
  
  // ETH received (before fees)
  const ethBeforeFees = currentRaised - newRaised;
  
  // Apply 5% fee
  return ethBeforeFees * 0.95;
}