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fix(fee-utils): remove hardcoded XLM_PRICE, suppress fabricated USD fee estimate #413

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Merged
Austinaminu2 merged 1 commit into from
Jul 26, 2026
Merged

fix(fee-utils): remove hardcoded XLM_PRICE, suppress fabricated USD fee estimate #413

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11 changes: 6 additions & 5 deletions lib/fee-utils.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -5,25 +5,26 @@ export interface FeeBreakdown {
estimatedUsd?: number;
}

const XLM_PRICE = 0.12; // Average XLM price in USD for estimation

/**
* Calculate fee breakdown from transaction simulation
* @param minResourceFee Minimum resource fee from simulation in stroops
* @param xlmPrice Current XLM price in USD (optional)
* @param xlmPrice Current XLM/USD price. Pass the live value from useTokenPrice;
* omit (or pass undefined) when no price is available and USD
* estimate should be suppressed.
* @returns Fee breakdown: base estimate, safety buffer, and total
*/
export function calculateFeeBreakdown(
minResourceFee: number,
xlmPrice: number = XLM_PRICE,
xlmPrice?: number,
): FeeBreakdown {
// Apply 15% buffer to ensure inclusion
const bufferMultiplier = 1.15;
const totalFee = Math.ceil(minResourceFee * bufferMultiplier);
const bufferFee = totalFee - minResourceFee;

const totalXlm = totalFee / 1e7;
const estimatedUsd = totalXlm * xlmPrice;
const estimatedUsd =
xlmPrice !== undefined ? totalXlm * xlmPrice : undefined;

return {
minFee: minResourceFee,
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