智能合约方案 智能合约/ Web3的JSON参考文件 { " wallet " : [{ " walletName " : " coinbase " , " preferred " : " boolean " }, { " walletName " : " trust " , " preferred " : " boolean " , " rpcUrl " : " RPC_URL " }, { " walletName " : " metamask " , " preferred " : " boolean " }, {