saepenatus
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Web3-Onboard makes it simple to connect Ethereum hardware and software wallets to your dapp. Features standardised spec compliant web3 providers for all supported wallets, framework agnostic modern javascript UI with code splitting, CSS customization, mul
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JavaScript
;
import { deepCopy, defineReadOnly } from "@ethersproject/properties";
import { Logger } from "@ethersproject/logger";
import { version } from "./_version";
const logger = new Logger(version);
import { JsonRpcProvider } from "./json-rpc-provider";
let _nextId = 1;
function buildWeb3LegacyFetcher(provider, sendFunc) {
const fetcher = "Web3LegacyFetcher";
return function (method, params) {
const request = {
method: method,
params: params,
id: (_nextId++),
jsonrpc: "2.0"
};
return new Promise((resolve, reject) => {
this.emit("debug", {
action: "request",
fetcher,
request: deepCopy(request),
provider: this
});
sendFunc(request, (error, response) => {
if (error) {
this.emit("debug", {
action: "response",
fetcher,
error,
request,
provider: this
});
return reject(error);
}
this.emit("debug", {
action: "response",
fetcher,
request,
response,
provider: this
});
if (response.error) {
const error = new Error(response.error.message);
error.code = response.error.code;
error.data = response.error.data;
return reject(error);
}
resolve(response.result);
});
});
};
}
function buildEip1193Fetcher(provider) {
return function (method, params) {
if (params == null) {
params = [];
}
const request = { method, params };
this.emit("debug", {
action: "request",
fetcher: "Eip1193Fetcher",
request: deepCopy(request),
provider: this
});
return provider.request(request).then((response) => {
this.emit("debug", {
action: "response",
fetcher: "Eip1193Fetcher",
request,
response,
provider: this
});
return response;
}, (error) => {
this.emit("debug", {
action: "response",
fetcher: "Eip1193Fetcher",
request,
error,
provider: this
});
throw error;
});
};
}
export class Web3Provider extends JsonRpcProvider {
constructor(provider, network) {
logger.checkNew(new.target, Web3Provider);
if (provider == null) {
logger.throwArgumentError("missing provider", "provider", provider);
}
let path = null;
let jsonRpcFetchFunc = null;
let subprovider = null;
if (typeof (provider) === "function") {
path = "unknown:";
jsonRpcFetchFunc = provider;
}
else {
path = provider.host || provider.path || "";
if (!path && provider.isMetaMask) {
path = "metamask";
}
subprovider = provider;
if (provider.request) {
if (path === "") {
path = "eip-1193:";
}
jsonRpcFetchFunc = buildEip1193Fetcher(provider);
}
else if (provider.sendAsync) {
jsonRpcFetchFunc = buildWeb3LegacyFetcher(provider, provider.sendAsync.bind(provider));
}
else if (provider.send) {
jsonRpcFetchFunc = buildWeb3LegacyFetcher(provider, provider.send.bind(provider));
}
else {
logger.throwArgumentError("unsupported provider", "provider", provider);
}
if (!path) {
path = "unknown:";
}
}
super(path, network);
defineReadOnly(this, "jsonRpcFetchFunc", jsonRpcFetchFunc);
defineReadOnly(this, "provider", subprovider);
}
send(method, params) {
return this.jsonRpcFetchFunc(method, params);
}
}
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