viem/_esm/actions/wallet/watchAsset.js

TypeScript Interface for Ethereum

/**
 * Adds an EVM chain to the wallet.
 *
 * - Docs: https://viem.sh/docs/actions/wallet/watchAsset
 * - JSON-RPC Methods: [`eth_switchEthereumChain`](https://eips.ethereum.org/EIPS/eip-747)
 *
 * @param client - Client to use
 * @param parameters - {@link WatchAssetParameters}
 * @returns Boolean indicating if the token was successfully added. {@link WatchAssetReturnType}
 *
 * @example
 * import { createWalletClient, custom } from 'viem'
 * import { mainnet } from 'viem/chains'
 * import { watchAsset } from 'viem/wallet'
 *
 * const client = createWalletClient({
 *   chain: mainnet,
 *   transport: custom(window.ethereum),
 * })
 * const success = await watchAsset(client, {
 *   type: 'ERC20',
 *   options: {
 *     address: '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2',
 *     decimals: 18,
 *     symbol: 'WETH',
 *   },
 * })
 */
export async function watchAsset(client, params) {
    const added = await client.request({
        method: 'wallet_watchAsset',
        params,
    }, { retryCount: 0 });
    return added;
}
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