pub fn mainnet_rpc_url() -> String {
    "https://api.mainnet-beta.solana.com".to_string()
}

pub fn testnet_rpc_url() -> String {
    "https://api.testnet.solana.com".to_string()
}

pub fn devnet_rpc_url() -> String {
    "https://api.devnet.solana.com".to_string()
}

pub fn local_rpc_url() -> String {
    "http://localhost:8899".to_string()
}
