web3modal-vue2/src/helpers/utils.js

A single Web3 / Ethereum provider solution for all Wallets

import * as env from "detect-browser";

import {CHAIN_DATA_LIST} from "../constants";
import {themesList} from "../themes";
import {providers, injected} from "../providers";


export function checkInjectedProviders() {
    const result = {
        injectedAvailable: !!window.ethereum || !!window.web3
    };
    if (result.injectedAvailable) {
        let fallbackProvider = true;
        Object.values(injected).forEach(provider => {
            const isAvailable = verifyInjectedProvider(provider.check);
            if (isAvailable) {
                result[provider.check] = true;
                fallbackProvider = false;
            }
        });

        const browser = env.detect();

        if (browser && browser.name === "opera") {
            result[injected.OPERA.check] = true;
            fallbackProvider = false;
        }

        if (fallbackProvider) {
            result[injected.FALLBACK.check] = true;
        }
    }

    return result;
}

export function verifyInjectedProvider(check) {
    return window.ethereum
        ? window.ethereum[check]
        : window.web3 &&
        window.web3.currentProvider &&
        window.web3.currentProvider[check];
}

export function getInjectedProvider() {
    let result = null;

    const injectedProviders = checkInjectedProviders();

    if (injectedProviders.injectedAvailable) {
        delete injectedProviders.injectedAvailable;
        const checks = Object.keys(injectedProviders);
        result = getProviderInfoFromChecksArray(checks);
    }
    return result;
}

export function getInjectedProviderName() {
    const injectedProvider = getInjectedProvider();
    return injectedProvider ? injectedProvider.name : null;
}

export function getProviderInfo(provider) {
    if (!provider) return providers.FALLBACK;
    const checks = Object.values(providers)
        .filter(x => provider[x.check])
        .map(x => x.check);
    return getProviderInfoFromChecksArray(checks);
}

export function getProviderInfoFromChecksArray(checks) {
    const check = filterProviderChecks(checks);
    return filterProviders("check", check);
}

export function getProviderInfoByName(name) {
    return filterProviders("name", name);
}

export function getProviderInfoById(id) {
    return filterProviders("id", id);
}

export function getProviderInfoByCheck(check) {
    return filterProviders("check", check);
}

export function isMobile() {
    let mobile = false;

    function hasTouchEvent() {
        try {
            document.createEvent("TouchEvent");
            return true;
        } catch (e) {
            return false;
        }
    }

    function hasMobileUserAgent() {
        if (
            /(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|ipad|iris|kindle|Android|Silk|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda|xiino/i.test(
                navigator.userAgent
            ) ||
            /1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw-(n|u)|c55\/|capi|ccwa|cdm-|cell|chtm|cldc|cmd-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc-s|devi|dica|dmob|do(c|p)o|ds(12|-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(-|_)|g1 u|g560|gene|gf-5|g-mo|go(.w|od)|gr(ad|un)|haie|hcit|hd-(m|p|t)|hei-|hi(pt|ta)|hp( i|ip)|hs-c|ht(c(-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i-(20|go|ma)|i230|iac( |-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|-[a-w])|libw|lynx|m1-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|-([1-8]|c))|phil|pire|pl(ay|uc)|pn-2|po(ck|rt|se)|prox|psio|pt-g|qa-a|qc(07|12|21|32|60|-[2-7]|i-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h-|oo|p-)|sdk\/|se(c(-|0|1)|47|mc|nd|ri)|sgh-|shar|sie(-|m)|sk-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h-|v-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl-|tdg-|tel(i|m)|tim-|t-mo|to(pl|sh)|ts(70|-|m3|m5)|tx-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas-|your|zeto|zte-/i.test(
                navigator.userAgent.substr(0, 4)
            )
        ) {
            return true;
        } else if (hasTouchEvent()) {
            return true;
        }
        return false;
    }

    mobile = hasMobileUserAgent();

    return mobile;
}

export function getProviderDescription(providerInfo) {
    if (providerInfo.description) {
        return providerInfo.description;
    }
    let description = "";
    switch (providerInfo.type) {
        case "injected":
            description = `Connect to your ${providerInfo.name} Wallet`;
            break;
        case "web":
            description = `Connect with your ${providerInfo.name} account`;
            break;
        case "qrcode":
            description = `Scan with ${providerInfo.name} to connect`;
            break;
        case "hardware":
            description = `Connect to your ${providerInfo.name} Hardware Wallet`;
            break;
        default:
            break;
    }
    return description;
}

export function filterMatches(array, condition, fallback) {
    let result = fallback;
    const matches = array.filter(condition);

    if (!!matches && matches.length) {
        result = matches[0];
    }

    return result;
}

export function filterProviders(param, value) {
    if (!value) return providers.FALLBACK;
    const match = filterMatches(
        Object.values(providers),
        x => x[param] === value,
        providers.FALLBACK
    );
    return match || providers.FALLBACK;
}

export function filterProviderChecks(checks) {
    if (!!checks && checks.length) {
        if (checks.length > 1) {
            if (
                checks[0] === injected.METAMASK.check ||
                checks[0] === injected.CIPHER.check
            ) {
                return checks[1];
            }
        }
        return checks[0];
    }
    return providers.FALLBACK.check;
}

export function getChainId(network) {
    const chains = Object.values(CHAIN_DATA_LIST);
    const match = filterMatches(
        chains,
        x => x.network === network,
        undefined
    );
    if (!match) {
        throw new Error(`No chainId found match ${network}`);
    }
    return match.chainId;
}

export function getThemeColors(theme) {
    return typeof theme === "string" ? themesList[theme].colors : theme;
}

export function findMatchingRequiredOptions(
    requiredOptions,
    providedOptions
) {
    const matches = requiredOptions.filter(requiredOption => {
        if (typeof requiredOption === "string") {
            return requiredOption in providedOptions;
        }
        const matches = findMatchingRequiredOptions(
            requiredOption,
            providedOptions
        );
        return matches && matches.length;
    });
    return matches;
}