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const ethUtil = require('ethereumjs-util')
const { conversionUtil, multiplyCurrencies } = require('../../conversion-util')
const MIN_GAS_PRICE_DEC = '0'
const MIN_GAS_PRICE_HEX = (parseInt(MIN_GAS_PRICE_DEC)).toString(16)
const MIN_GAS_LIMIT_DEC = '21000'
const MIN_GAS_LIMIT_HEX = (parseInt(MIN_GAS_LIMIT_DEC)).toString(16)
const MIN_GAS_PRICE_GWEI = ethUtil.addHexPrefix(conversionUtil(MIN_GAS_PRICE_HEX, {
fromDenomination: 'WEI',
toDenomination: 'GWEI',
fromNumericBase: 'hex',
toNumericBase: 'hex',
numberOfDecimals: 1,
}))
const MIN_GAS_TOTAL = multiplyCurrencies(MIN_GAS_LIMIT_HEX, MIN_GAS_PRICE_HEX, {
toNumericBase: 'hex',
multiplicandBase: 16,
multiplierBase: 16,
})
const TOKEN_TRANSFER_FUNCTION_SIGNATURE = '0xa9059cbb'
const INSUFFICIENT_FUNDS_ERROR = 'insufficientFunds'
const INSUFFICIENT_TOKENS_ERROR = 'insufficientTokens'
const NEGATIVE_ETH_ERROR = 'negativeETH'
const INVALID_RECIPIENT_ADDRESS_ERROR = 'invalidAddressRecipient'
const REQUIRED_ERROR = 'required'
const KNOWN_RECIPIENT_ADDRESS_ERROR = 'knownAddressRecipient'
const ONE_GWEI_IN_WEI_HEX = ethUtil.addHexPrefix(conversionUtil('0x1', {
fromDenomination: 'GWEI',
toDenomination: 'WEI',
fromNumericBase: 'hex',
toNumericBase: 'hex',
}))
const SIMPLE_GAS_COST = '0x5208' // Hex for 21000, cost of a simple send.
const BASE_TOKEN_GAS_COST = '0x186a0' // Hex for 100000, a base estimate for token transfers.
module.exports = {
INSUFFICIENT_FUNDS_ERROR,
INSUFFICIENT_TOKENS_ERROR,
INVALID_RECIPIENT_ADDRESS_ERROR,
KNOWN_RECIPIENT_ADDRESS_ERROR,
MIN_GAS_LIMIT_DEC,
MIN_GAS_LIMIT_HEX,
MIN_GAS_PRICE_DEC,
MIN_GAS_PRICE_GWEI,
MIN_GAS_PRICE_HEX,
MIN_GAS_TOTAL,
NEGATIVE_ETH_ERROR,
ONE_GWEI_IN_WEI_HEX,
REQUIRED_ERROR,
SIMPLE_GAS_COST,
TOKEN_TRANSFER_FUNCTION_SIGNATURE,
BASE_TOKEN_GAS_COST,
}
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