Currency & Amounts

Amounts in the ParaSta API are always integers in the smallest unit of the currency. There are no floats. This avoids rounding errors.

Decimals by currency

Currency	Decimals	1 unit equals
USDT	6	1000000
USDC	6	1000000
ETH	18	1000000000000000000
SOL	9	1000000000
KRW	0	1

Examples

To charge 10 USDT:

{ "amount": 10000000, "currency": "USDT" }

To charge 0.05 ETH:

{ "amount": 50000000000000000, "currency": "ETH" }

Display formatting

Convert to a human-readable string with the helper of your choice. Example:

function format(amount, decimals) {
  const s = amount.toString().padStart(decimals + 1, '0');
  return `${s.slice(0, -decimals)}.${s.slice(-decimals).replace(/0+$/, '') || '0'}`;
}
format(10000000n, 6); // "10"

Currency conversion (Settlement)

When settlement_mode: "krw", ParaSta exchanges the received crypto to KRW at the rate quoted at confirmation time. See Settlement and GET /v1/exchange_rates.