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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| import Vue from 'vue'; | ||
| import Big from 'big.js'; | ||
| import {getFeeValue} from 'minterjs-util/src/fee'; | ||
| import {COIN_NAME} from '~/assets/variables'; | ||
| import {estimateCoinBuy} from '~/api/gate'; | ||
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| let coinPricePromiseList = {}; | ||
|
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| /** | ||
| * @typedef {Object} FeeData | ||
| * @property {boolean} isBaseCoin | ||
| * @property {number|string} baseCoinValue | ||
| * @property {number|string} value | ||
| * @property {string} coinSymbol | ||
| */ | ||
|
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| /** | ||
| * | ||
| * @param {string} txType | ||
| * @param {Object} [txFeeOptions] | ||
| * @param {number} [messageLength] | ||
| * @param {string} [selectedCoinSymbol] | ||
| * @param {string} [selectedFeeCoinSymbol] | ||
| * @param {number} [baseCoinAmount] | ||
| * @param {boolean} [isOffline] | ||
| * @return {Vue} | ||
| * @constructor | ||
| */ | ||
|
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||
| export default function FeeBus({txType, txFeeOptions, messageLength = 0, selectedCoinSymbol, selectedFeeCoinSymbol, baseCoinAmount = 0, isOffline}) { | ||
| return new Vue({ | ||
| data: { | ||
| txType, | ||
| txFeeOptions, | ||
| messageLength, | ||
| selectedCoinSymbol, | ||
| selectedFeeCoinSymbol, | ||
| baseCoinAmount, | ||
| coinPriceList: {}, | ||
| isOffline, | ||
| }, | ||
| computed: { | ||
| baseCoinFeeValue() { | ||
| return getFeeValue(this.txType, this.messageLength, this.txFeeOptions) || 0; | ||
| }, | ||
| isBaseCoinEnough() { | ||
| return baseCoinAmount >= this.baseCoinFeeValue; | ||
| }, | ||
| isBaseCoinFee() { | ||
| // use selectedFeeCoinSymbol if it is defined | ||
| if (this.selectedFeeCoinSymbol && this.selectedFeeCoinSymbol !== COIN_NAME) { | ||
| return false; | ||
| } | ||
| // no coins selected: show base | ||
| if (!this.selectedCoinSymbol) { | ||
| return true; | ||
| } | ||
| // base coin is selected or it is enough to pay fee | ||
| return this.selectedFeeCoinSymbol === COIN_NAME || this.selectedCoinSymbol === COIN_NAME || this.isBaseCoinEnough; | ||
| }, | ||
| feeValue() { | ||
| if (this.isBaseCoinFee) { | ||
| return this.baseCoinFeeValue; | ||
| } else { | ||
| const coinEstimation = this.coinPriceList[this.feeCoinSymbol]; | ||
| if (coinEstimation) { | ||
| return new Big(coinEstimation.coinAmount).div(coinEstimation.baseCoinAmount).times(this.baseCoinFeeValue); | ||
| } else { | ||
| return 0; | ||
| } | ||
| } | ||
| }, | ||
| feeCoinSymbol() { | ||
| // use selectedFeeCoinSymbol if it is defined | ||
| if (this.selectedFeeCoinSymbol) { | ||
| return this.selectedFeeCoinSymbol; | ||
| } | ||
| if (this.isBaseCoinFee) { | ||
| return COIN_NAME; | ||
| } else { | ||
| return this.selectedCoinSymbol; | ||
| } | ||
| }, | ||
| fee() { | ||
| return { | ||
| baseCoinValue: this.baseCoinFeeValue, | ||
| isBaseCoin: this.isBaseCoinFee, | ||
| isBaseCoinEnough: this.isBaseCoinEnough, | ||
| value: this.feeValue, | ||
| coinSymbol: this.feeCoinSymbol, | ||
| }; | ||
| }, | ||
| }, | ||
| watch: { | ||
| fee: { | ||
| handler(newVal) { | ||
| this.$emit('updateFee', newVal); | ||
| }, | ||
| deep: true, | ||
| }, | ||
| }, | ||
| created() { | ||
| this.$on('updateParams', function(params) { | ||
| Object.keys(params).forEach((key) => { | ||
| this[key] = params[key]; | ||
| }); | ||
| if (this.isOffline) { | ||
| return; | ||
| } | ||
| // wait for computed to recalculate | ||
| this.$nextTick(() => { | ||
| if (!this.isBaseCoinFee) { | ||
| const feeCoinSymbol = this.feeCoinSymbol; | ||
| getEstimation(feeCoinSymbol, this.baseCoinFeeValue) | ||
| .then((result) => this.$set(this.coinPriceList, feeCoinSymbol, result)); | ||
| } | ||
| }); | ||
| }); | ||
| }, | ||
| }); | ||
| } | ||
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| /** | ||
| * is older than 1 min? | ||
| * @param coinPricePromise | ||
| * @return {boolean} | ||
| */ | ||
| function isEstimationOutdated(coinPricePromise) { | ||
| return coinPricePromise.timestamp && (Date.now() - coinPricePromise.timestamp) > 60 * 1000; | ||
| } | ||
|
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| /** | ||
| * | ||
| * @param coinSymbol | ||
| * @param baseCoinAmount | ||
| * @return {Promise<{coinSymbol: string, coinAmount: string, baseCoinAmount: string}>} | ||
| */ | ||
| function getEstimation(coinSymbol, baseCoinAmount) { | ||
| // if estimation exists and not outdated return it | ||
| if (coinPricePromiseList[coinSymbol] && !isEstimationOutdated(coinPricePromiseList[coinSymbol])) { | ||
| return coinPricePromiseList[coinSymbol].promise; | ||
| } | ||
|
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| coinPricePromiseList[coinSymbol] = {}; | ||
| coinPricePromiseList[coinSymbol].promise = estimateCoinBuy({ | ||
| coinToSell: coinSymbol, | ||
| valueToBuy: baseCoinAmount, | ||
| coinToBuy: COIN_NAME, | ||
| }) | ||
| .then((result) => { | ||
| coinPricePromiseList[coinSymbol].timestamp = Date.now(); | ||
| return { | ||
| coinSymbol, | ||
| coinAmount: result.will_pay, | ||
| baseCoinAmount, | ||
| }; | ||
| }) | ||
| .catch((e) => { | ||
| delete coinPricePromiseList[coinSymbol]; | ||
| throw e; | ||
| }); | ||
|
|
||
| return coinPricePromiseList[coinSymbol].promise; | ||
| } |
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