type Result = variant { Ok : text; Err : text };
service : {
batch_request : () -> (Result);
get_block : (opt nat64) -> (Result);
get_canister_addr : () -> (Result);
get_eth_balance : (text) -> (Result);
get_eth_gas_price : () -> (Result);
send_eth : (text, nat64) -> (Result);
send_token : (text, text, nat64) -> (Result);
token_balance : (text, text) -> (Result);
}