Methods and properties available to Solana rpc providers. Exported by @dynamic-labs/solana-core. 
type SolanaRpcProviderMethods = {
  defaultProvider: SolanaRpcProvider | undefined
  providers: SolanaRpcProvider[] | undefined
  getProviderByChainId: (chainId: string) => SolanaRpcProvider | undefined
}
Check out the reference for SolanaRpcProvider