send-crypto
Version:
A minimal JavaScript library / wallet for sending crypto assets
216 lines • 19.5 kB
JavaScript
import BigNumber from "bignumber.js";
import { BCHHandler } from "./handlers/BCH/BCHHandler";
import { BTCHandler } from "./handlers/BTC/BTCHandler";
import { ERC20Handler } from "./handlers/ERC20/ERC20Handler";
import { ETHHandler } from "./handlers/ETH/ETHHandler";
import { FILHandler } from "./handlers/FIL/FILHandler";
import { LTCHandler } from "./handlers/LTC/LTCHandler";
import { TERRAHandler } from "./handlers/TERRA/TERRAHandler";
import { ZECHandler } from "./handlers/ZEC/ZECHandler";
import { strip0x, toHex } from "./lib/utils";
export default class CryptoAccount {
handlers = [];
privateKey;
network;
defaultAsset;
constructorOptions;
sharedState;
constructor(privateKey, options) {
this.privateKey = strip0x(privateKey instanceof Uint8Array ? toHex(privateKey) : privateKey);
this.network = (options && options.network) || "mainnet";
this.constructorOptions = options;
this.sharedState = {};
this.registerHandler(BTCHandler, 0);
this.registerHandler(ZECHandler, 10);
this.registerHandler(BCHHandler, 20);
this.registerHandler(ETHHandler, 30);
this.registerHandler(FILHandler, 40);
this.registerHandler(TERRAHandler, 50);
this.registerHandler(ERC20Handler, 60);
this.registerHandler(LTCHandler, 60);
if (options && options.extraHandlers) {
for (const handler of options.extraHandlers) {
this.registerHandler(handler);
}
}
this.defaultAsset = options && options.defaultAsset;
}
registerHandler = (handlerClass, priorityIn) => {
const priority = priorityIn === undefined
? this.handlers.length === 0
? 0
: this.handlers[this.handlers.length - 1].priority
: priorityIn;
const lastPosition = this.handlers.reduce((index, item, currentIndex) => item.priority <= priority ? currentIndex + 1 : index, 0);
this.handlers.splice(lastPosition, 0, {
handler: new handlerClass(this.privateKey, this.network, this.constructorOptions, this.sharedState),
priority,
});
};
address = async (assetIn, options) => {
const asset = assetIn || this.defaultAsset;
if (!asset) {
throw new Error(`Must provide an asset`);
}
return this.deferHandler().address(asset, options);
};
getBalance = async (assetIn, options) => {
const asset = assetIn || this.defaultAsset;
if (!asset) {
throw new Error(`Must provide an asset`);
}
const bn = await this.deferHandler().getBalance(asset, options);
return (options && options.bn ? new options.bn(bn.toFixed()) : bn.toNumber());
};
// tslint:disable-next-line: member-ordering
balanceOf = this.getBalance;
getBalanceInSats = async (assetIn, options) => {
const asset = assetIn || this.defaultAsset;
if (!asset) {
throw new Error(`Must provide an asset`);
}
const bn = await this.deferHandler().getBalanceInSats(asset, options);
return (options && options.bn ? new options.bn(bn.toFixed()) : bn.toNumber());
};
// tslint:disable-next-line: member-ordering
balanceOfInSats = this.getBalanceInSats;
send = (to, value, assetIn, options) => {
const asset = assetIn || this.defaultAsset;
if (!asset) {
throw new Error(`Must provide an asset`);
}
return this.deferHandler().send(to, new BigNumber(value.toString()), asset, options);
};
sendSats = (to, value, assetIn, options) => {
const asset = assetIn || this.defaultAsset;
if (!asset) {
throw new Error(`Must provide an asset`);
}
return this.deferHandler().sendSats(to, new BigNumber(value.toString()), asset, options);
};
deferHandler = (thisHandler) => {
return {
address: (deferredAsset, deferredOptions) => {
const nextHandler = this.findHandler(deferredAsset, thisHandler);
if (nextHandler.address) {
return nextHandler.address(deferredAsset, deferredOptions || {}, this.deferHandler(nextHandler));
}
else {
return this.deferHandler(nextHandler).address(deferredAsset, deferredOptions);
}
},
getBalance: (deferredAsset, deferredOptions) => {
const nextHandler = this.findHandler(deferredAsset, thisHandler);
if (nextHandler.getBalance) {
return nextHandler.getBalance(deferredAsset, deferredOptions || {}, this.deferHandler(nextHandler));
}
else {
return this.deferHandler(nextHandler).getBalance(deferredAsset, deferredOptions);
}
},
getBalanceInSats: (deferredAsset, deferredOptions) => {
const nextHandler = this.findHandler(deferredAsset, thisHandler);
if (nextHandler.getBalanceInSats) {
return nextHandler.getBalanceInSats(deferredAsset, deferredOptions || {}, this.deferHandler(nextHandler));
}
else {
return this.deferHandler(nextHandler).getBalanceInSats(deferredAsset, deferredOptions);
}
},
send: (deferredTo, deferredValue, deferredAsset, deferredOptions) => {
const nextHandler = this.findHandler(deferredAsset, thisHandler);
if (nextHandler.send) {
return nextHandler.send(deferredTo, deferredValue, deferredAsset, deferredOptions || {}, this.deferHandler(nextHandler));
}
else {
return this.deferHandler(nextHandler).send(deferredTo, deferredValue, deferredAsset, deferredOptions);
}
},
sendSats: (deferredTo, deferredValue, deferredAsset, deferredOptions) => {
const nextHandler = this.findHandler(deferredAsset, thisHandler);
if (nextHandler.sendSats) {
return nextHandler.sendSats(deferredTo, deferredValue, deferredAsset, deferredOptions || {}, this.deferHandler(nextHandler));
}
else {
return this.deferHandler(nextHandler).sendSats(deferredTo, deferredValue, deferredAsset, deferredOptions);
}
},
};
};
findHandler = (asset, from) => {
const fromIndex = from
? this.handlers.findIndex((i) => i.handler === from)
: -1;
for (let i = (fromIndex === -1 ? this.handlers.length : fromIndex) - 1; i >= 0; i--) {
const handler = this.handlers[i].handler;
// console.log(handler);
if (handler.handlesAsset(asset)) {
return handler;
}
}
let assetString;
try {
assetString = JSON.stringify(asset);
}
catch (error) {
assetString = (asset && asset.name) || asset;
}
throw new Error(`Unsupported asset ${assetString}`);
};
}
export const newPrivateKey = () => {
// @ts-ignore
try {
// @ts-ignore
const array = new Uint8Array(32);
// @ts-ignore
window.crypto.getRandomValues(array);
return toHex(array);
}
catch (error) {
// Ignore window error.
}
return require("crypto").randomBytes(32).toString("hex");
};
CryptoAccount.newPrivateKey = newPrivateKey;
////////////////////////////////////////////////////////////////////////////////
// EXPORTS //
// Based on https://github.com/MikeMcl/bignumber.js/blob/master/bignumber.js //
////////////////////////////////////////////////////////////////////////////////
// tslint:disable: no-object-mutation
// tslint:disable-next-line: no-string-literal
CryptoAccount.default = CryptoAccount.CryptoAccount =
CryptoAccount;
// AMD
try {
// @ts-ignore
if (typeof define === "function" && define.amd) {
// @ts-ignore
define(() => CryptoAccount);
}
}
catch (error) {
/* ignore */
}
// Node.js and other environments that support module.exports.
try {
// @ts-ignore
if (typeof module !== "undefined" && module.exports) {
module.exports = CryptoAccount;
}
}
catch (error) {
/* ignore */
}
// Browser.
try {
// @ts-ignore
if (typeof window !== "undefined" && window) {
// @ts-ignore
window.CryptoAccount = CryptoAccount;
}
}
catch (error) {
/* ignore */
}
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