@aeternity/aepp-sdk/es/tx/builder/field-types/gas-price.js

SDK for the æternity blockchain

import BigNumber from 'bignumber.js';
import coinAmount from './coin-amount.js';
import { ArgumentError, IllegalArgumentError } from '../../../utils/errors.js';
import { MIN_GAS_PRICE } from '../constants.js';
import { formatAmount } from '../../../utils/amount-formatter.js';
const gasPriceCache = new WeakMap();
export async function getCachedIncreasedGasPrice(node) {
  const cache = gasPriceCache.get(node);
  if (cache != null && cache.time > Date.now() - 20 * 1000) {
    return cache.gasPrice;
  }
  const {
    minGasPrice,
    utilization
  } = (await node.getRecentGasPrices())[0];
  let gasPrice = utilization < 70 ? 0n : BigInt(new BigNumber(minGasPrice.toString()).times(1.01).integerValue().toFixed());
  const maxSafeGasPrice = BigInt(MIN_GAS_PRICE) * 100000n; // max microblock fee is 600ae or 35usd
  if (gasPrice > maxSafeGasPrice) {
    console.warn(`Estimated gas price ${gasPrice} exceeds the maximum safe value for unknown reason.` + ` It will be limited to ${maxSafeGasPrice}.` + ' To overcome this restriction provide `gasPrice`/`fee` in options.');
    gasPrice = maxSafeGasPrice;
  }
  gasPriceCache.set(node, {
    gasPrice,
    time: Date.now()
  });
  return gasPrice;
}

// TODO: use withFormatting after using a single type for coins representation
export default {
  ...coinAmount,
  async prepare(value, params, {
    onNode,
    denomination
  }) {
    if (value != null) return value;
    if (onNode == null) {
      throw new ArgumentError('onNode', 'provided (or provide `gasPrice` instead)', onNode);
    }
    const gasPrice = await getCachedIncreasedGasPrice(onNode);
    if (gasPrice === 0n) return undefined;
    return formatAmount(gasPrice, {
      targetDenomination: denomination
    });
  },
  serializeAettos(value = MIN_GAS_PRICE.toString()) {
    if (+value < MIN_GAS_PRICE) {
      throw new IllegalArgumentError(`Gas price ${value.toString()} must be bigger than ${MIN_GAS_PRICE}`);
    }
    return value;
  }
};
//# sourceMappingURL=gas-price.js.map