Function parseOverrides

packages/airnode-admin/src/implementation.ts:46–106

(
  provider: ethers.providers.Provider,
  overrides: ethers.Overrides = {}
)

 * @returns The parsed overrides object with values compatible with Ethers
 */
export const parseOverrides = async (
  provider: ethers.providers.Provider,
  overrides: ethers.Overrides = {}
): Promise<ethers.Overrides> => {
  const { gasPrice, maxFeePerGas, maxPriorityFeePerGas } = overrides;

  const feeData = await provider.getFeeData();
  const supportsEip1559 = !!(feeData.maxFeePerGas && feeData.maxPriorityFeePerGas);
  const hasEip1559Overrides = !!(maxFeePerGas || maxPriorityFeePerGas);
  const hasLegacyOverrides = !!gasPrice;

  // Mixed overrides
  if (hasLegacyOverrides && hasEip1559Overrides) {
    throw new Error('Both legacy and EIP1559 override pricing options specified - ambiguous');
  }
  // Chain does not support EIP1559 but EIP1559 overrides provided
  if (!supportsEip1559 && hasEip1559Overrides) {
    throw new Error('EIP1559 override pricing specified on legacy network');
  }

  // EIP1559 network and no EIP1559 overrides or legacy overrides
  if (supportsEip1559 && !hasEip1559Overrides && !hasLegacyOverrides) {
    const gasTarget = await fetchProviderRecommendedEip1559GasPrice(
      provider,
      {
        gasPriceStrategy: 'providerRecommendedEip1559GasPrice',
        baseFeeMultiplier: 2,
        priorityFee: {
          value: 3.12,
          unit: 'gwei',
        },
      },
      Date.now()
    );

    return {
      ...overrides,
      ...gasTarget,
    };
  }

  // Legacy network and no legacy overrides
  if (!supportsEip1559 && !hasLegacyOverrides) {
    const gasTarget = await fetchProviderRecommendedGasPrice(
      provider,
      {
        gasPriceStrategy: 'providerRecommendedGasPrice',
        recommendedGasPriceMultiplier: 1,
      },
      Date.now()
    );

    return {
      ...overrides,
      ...gasTarget,
    };
  }