story-research-zapwall/lib/platformCommissions.ts

import { PLATFORM_NPUB, PLATFORM_BITCOIN_ADDRESS } from './platformConfig'

/**
 * Platform commission configuration
 * Defines commission rates and split amounts for all payment types
 */
export const PLATFORM_COMMISSIONS = {
  /**
   * Article payment commission
   * Total: 800 sats
   * Author: 700 sats
   * Platform: 100 sats
   */
  article: {
    total: 800,
    author: 700,
    platform: 100,
  },

  /**
   * Review reward commission
   * Total: 70 sats
   * Reviewer: 49 sats
   * Platform: 21 sats
   */
  review: {
    total: 70,
    reviewer: 49,
    platform: 21,
  },

  /**
   * Sponsoring commission
   * Total: 0.046 BTC (4,600,000 sats)
   * Author: 0.042 BTC (4,200,000 sats)
   * Platform: 0.004 BTC (400,000 sats)
   */
  sponsoring: {
    total: 0.046,
    author: 0.042,
    platform: 0.004,
    totalSats: 4_600_000,
    authorSats: 4_200_000,
    platformSats: 400_000,
  },
} as const

/**
 * Platform Lightning address/node for receiving commissions
 * This should be configured with the platform's Lightning node
 */
export const PLATFORM_LIGHTNING_ADDRESS = process.env.NEXT_PUBLIC_PLATFORM_LIGHTNING_ADDRESS || ''

/**
 * Calculate commission split for article payment
 */
export function calculateArticleSplit(totalAmount: number = PLATFORM_COMMISSIONS.article.total): {
  author: number
  platform: number
  total: number
} {
  if (totalAmount !== PLATFORM_COMMISSIONS.article.total) {
    throw new Error(`Invalid article payment amount: ${totalAmount}. Expected ${PLATFORM_COMMISSIONS.article.total} sats`)
  }

  return {
    author: PLATFORM_COMMISSIONS.article.author,
    platform: PLATFORM_COMMISSIONS.article.platform,
    total: PLATFORM_COMMISSIONS.article.total,
  }
}

/**
 * Calculate commission split for review reward
 */
export function calculateReviewSplit(totalAmount: number = PLATFORM_COMMISSIONS.review.total): {
  reviewer: number
  platform: number
  total: number
} {
  if (totalAmount !== PLATFORM_COMMISSIONS.review.total) {
    throw new Error(`Invalid review reward amount: ${totalAmount}. Expected ${PLATFORM_COMMISSIONS.review.total} sats`)
  }

  return {
    reviewer: PLATFORM_COMMISSIONS.review.reviewer,
    platform: PLATFORM_COMMISSIONS.review.platform,
    total: PLATFORM_COMMISSIONS.review.total,
  }
}

/**
 * Calculate commission split for sponsoring
 */
export function calculateSponsoringSplit(totalAmount: number = PLATFORM_COMMISSIONS.sponsoring.total): {
  author: number
  platform: number
  total: number
  authorSats: number
  platformSats: number
  totalSats: number
} {
  if (totalAmount !== PLATFORM_COMMISSIONS.sponsoring.total) {
    throw new Error(
      `Invalid sponsoring amount: ${totalAmount} BTC. Expected ${PLATFORM_COMMISSIONS.sponsoring.total} BTC`
    )
  }

  return {
    author: PLATFORM_COMMISSIONS.sponsoring.author,
    platform: PLATFORM_COMMISSIONS.sponsoring.platform,
    total: PLATFORM_COMMISSIONS.sponsoring.total,
    authorSats: PLATFORM_COMMISSIONS.sponsoring.authorSats,
    platformSats: PLATFORM_COMMISSIONS.sponsoring.platformSats,
    totalSats: PLATFORM_COMMISSIONS.sponsoring.totalSats,
  }
}

/**
 * Verify that a payment amount matches expected commission split
 */
export function verifyPaymentSplit(
  type: 'article' | 'review' | 'sponsoring',
  totalAmount: number,
  authorAmount?: number,
  platformAmount?: number
): boolean {
  switch (type) {
    case 'article':
      const articleSplit = calculateArticleSplit(totalAmount)
      return (
        articleSplit.author === (authorAmount ?? 0) && articleSplit.platform === (platformAmount ?? 0)
      )

    case 'review':
      const reviewSplit = calculateReviewSplit(totalAmount)
      return (
        reviewSplit.reviewer === (authorAmount ?? 0) && reviewSplit.platform === (platformAmount ?? 0)
      )

    case 'sponsoring':
      const sponsoringSplit = calculateSponsoringSplit(totalAmount)
      return (
        sponsoringSplit.authorSats === (authorAmount ?? 0) &&
        sponsoringSplit.platformSats === (platformAmount ?? 0)
      )

    default:
      return false
  }
}