72 lines
2.2 KiB
TypeScript
72 lines
2.2 KiB
TypeScript
interface Options {
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httpUrl: string;
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networkId: string;
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feeToken: string;
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gasPrice: number;
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bech32prefix: string;
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}
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const defaultOptions: Options = {
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httpUrl: "https://lcd.demo-10.cosmwasm.com",
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networkId: "testing",
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feeToken: "ucosm",
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gasPrice: 0.025,
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bech32prefix: "cosmos",
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};
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const defaultFaucetUrl = "https://faucet.demo-10.cosmwasm.com/credit";
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const connect = async (
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mnemonic: string,
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opts: Partial<Options>,
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): Promise<{
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client: SigningCosmWasmClient;
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address: string;
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}> => {
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const options: Options = { ...defaultOptions, ...opts };
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const gasPrice = GasPrice.fromString(`${options.gasPrice}${options.feeToken}`);
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const wallet = await Secp256k1HdWallet.fromMnemonic(mnemonic);
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const [{ address }] = await wallet.getAccounts();
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const client = new SigningCosmWasmClient(options.httpUrl, address, wallet, gasPrice);
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return { client, address };
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};
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// loadOrCreateMnemonic will try to load a mnemonic from the file.
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// If missing, it will generate a random one and save to the file.
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//
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// This is not secure, but does allow simple developer access to persist a
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// mnemonic between sessions
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const loadOrCreateMnemonic = (filename: string): string => {
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try {
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const mnemonic = fs.readFileSync(filename, "utf8");
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return mnemonic.trim();
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} catch (err) {
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const mnemonic = Bip39.encode(Random.getBytes(16)).toString();
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fs.writeFileSync(filename, mnemonic, "utf8");
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return mnemonic;
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}
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};
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const randomAddress = async (prefix: string): Promise<string> => {
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const mnemonic = Bip39.encode(Random.getBytes(16)).toString();
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return mnemonicToAddress(prefix, mnemonic);
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};
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const mnemonicToAddress = async (prefix: string, mnemonic: string): Promise<string> => {
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const wallet = await Secp256k1HdWallet.fromMnemonic(mnemonic);
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const [{ address }] = await wallet.getAccounts();
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return address;
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};
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const downloadWasm = async (url: string): Promise<Uint8Array> => {
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const r = await axios.get(url, { responseType: "arraybuffer" });
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if (r.status !== 200) {
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throw new Error(`Download error: ${r.status}`);
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}
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return r.data;
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};
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const getAttibute = (logs: readonly logs.Log[], key: string): string | undefined =>
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logs[0].events[0].attributes.find((x) => x.key == key)?.value;
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