emerald-cli 0.23.0

Console utility for secure account management
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108

//! # JSON RPC module

mod http;
mod serialize;

pub use self::http::{ClientMethod, MethodParams, RpcConnector};
use cmd::Error;
use emerald::Address;
use hex::ToHex;
use jsonrpc_core::{Params, Value};

/// Get nonce for address from remote node
///
/// # Arguments:
///
/// * addr - target address
///
pub fn request_nonce(rpc: &RpcConnector, addr: &Address) -> Result<String, Error> {
    let data = vec![
        Value::String(addr.to_string()),
        Value::String("latest".to_string()),
    ];
    let params = Params::Array(data);
    let val = rpc.send_post(&MethodParams(ClientMethod::EthGetTxCount, &params))?;

    match val.as_str() {
        Some(s) => Ok(s.to_string()),
        None => Err(Error::ExecError("Can't parse tx count".to_string())),
    }
}

/// Get balance for selected account
///
/// # Arguments:
///
/// * rpc -
/// * addr - target account
///
/// # Return:
///
/// * String - latest balance
///
pub fn request_balance(rpc: &RpcConnector, addr: &Address) -> Result<String, Error> {
    let data = vec![
        Value::String(addr.to_string()),
        Value::String("latest".to_string()),
    ];

    let params = Params::Array(data);
    rpc.send_post(&MethodParams(ClientMethod::EthGetBalance, &params))
        .and_then(|v| match v.as_str() {
            Some(str) => Ok(str.to_string()),
            None => Err(Error::ExecError(format!("Can't get balance for {}", addr))),
        })
}

/// Get estimated gas from remote node
///
/// # Arguments:
///
/// * rpc -
///
pub fn request_gas(rpc: &RpcConnector) -> Result<String, Error> {
    let data = vec![Value::String("latest".to_string())];
    let params = Params::Array(data);
    let val = rpc.send_post(&MethodParams(ClientMethod::EthEstimateGas, &params))?;

    match val.as_str() {
        Some(s) => Ok(s.to_string()),
        None => Err(Error::ExecError("Can't estimate required gas".to_string())),
    }
}

/// Get gas price from remote node
///
/// # Arguments:
///
/// * rpc -
///
pub fn request_gas_price(rpc: &RpcConnector) -> Result<String, Error> {
    let params = Params::Array(vec![]);
    let val = rpc.send_post(&MethodParams(ClientMethod::EthGasPrice, &params))?;

    match val.as_str() {
        Some(s) => Ok(s.to_string()),
        None => Err(Error::ExecError("Can't estimate gas price".to_string())),
    }
}

/// Send signed raw transaction to the remote client
///
/// # Arguments:
///
/// * raw - signed tx
///
/// # Return:
///
/// * String - transaction hash
///
pub fn send_transaction(rpc: &RpcConnector, raw: &[u8]) -> Result<String, Error> {
    let data = vec![Value::String(format!("0x{}", &raw.to_hex()))];
    let params = Params::Array(data);
    rpc.send_post(&MethodParams(ClientMethod::EthSendRawTransaction, &params))
        .and_then(|v| match v.as_str() {
            Some(str) => Ok(str.to_string()),
            None => Err(Error::ExecError("Can't parse tx hash".to_string())),
        })
}