事件
accountsChanged
每当账户地址变化时触发
cactuslink.on('accountsChanged', handler: (accounts: Array<string>) => void);
cactuslink.removeListener('accountsChanged', handler: (accounts: Array<string>) => void);
networkChanged
每当网络变化时触发
cactuslink.on('networkChanged', handler: (network: string) => void);
cactuslink.removeListener('networkChanged', handler: (network: string) => void);