Add interactive stake allow

Resolves #98

CHANGELOG.md

@@ -7,6 +7,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Add interactive stake allow [[#98](https://github.com/dusk-network/wallet-cli/issues/98)]
+
 ### Fixed
 
 - Fix staking address display [#204]
@@ -431,6 +434,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Implementation of `Store` trait from `wallet-core`
 - Implementation of `State` and `Prover` traits from `wallet-core`
 
+[#98]: https://github.com/dusk-network/wallet-cli/issues/98
 [#179]: https://github.com/dusk-network/wallet-cli/issues/179
 [#204]: https://github.com/dusk-network/wallet-cli/issues/204
 [#182]: https://github.com/dusk-network/wallet-cli/issues/182

src/bin/interactive.rs

@@ -192,6 +192,7 @@ enum CommandMenuItem {
     History,
     Transfer,
     Stake,
+    StakeAllow,
     StakeInfo,
     Unstake,
     Withdraw,
@@ -212,6 +213,7 @@ fn menu_op(
         .add(CMI::History, "Transaction History")
         .add(CMI::Transfer, "Transfer Dusk")
         .add(CMI::Stake, "Stake Dusk")
+        .add(CMI::StakeAllow, "Allow staking key")
         .add(CMI::StakeInfo, "Check existing stake")
         .add(CMI::Unstake, "Unstake Dusk")
         .add(CMI::Withdraw, "Withdraw staking reward")
@@ -244,6 +246,12 @@ fn menu_op(
             gas_limit: prompt::request_gas_limit(DEFAULT_STAKE_GAS_LIMIT)?,
             gas_price: prompt::request_gas_price()?,
         })),
+        CMI::StakeAllow => AddrOp::Run(Box::new(Command::StakeAllow {
+            addr: Some(addr),
+            key: prompt::request_provisioner_key()?,
+            gas_limit: prompt::request_gas_limit(DEFAULT_STAKE_GAS_LIMIT)?,
+            gas_price: prompt::request_gas_price()?,
+        })),
         CMI::StakeInfo => AddrOp::Run(Box::new(Command::StakeInfo {
             addr: Some(addr),
             reward: false,

src/bin/io/prompt.rs

@@ -21,7 +21,7 @@ use requestty::Question;
 use dusk_wallet::{Address, Dusk, Lux};
 
 use dusk_wallet::gas;
-use dusk_wallet::{MAX_CONVERTIBLE, MIN_CONVERTIBLE};
+use dusk_wallet::{MAX_CONVERTIBLE, MIN_CONVERTIBLE, PROVISIONER_KEY_LENGTH};
 use sha2::{Digest, Sha256};
 
 /// Request the user to authenticate with a password
@@ -231,6 +231,22 @@ fn check_valid_denom(value: f64, balance: Dusk) -> Result<(), String> {
     }
 }
 
+fn check_valid_pkey(key: &str) -> Result<(), String> {
+    let key_length = match bs58::decode(key).into_vec() {
+        Ok(v) => v.len(),
+        Err(_) => {
+            return Err(
+                "Please introduce a valid provisioner key (Base58)".to_string()
+            )
+        }
+    };
+    if key_length == PROVISIONER_KEY_LENGTH {
+        Ok(())
+    } else {
+        Err(format!("Invalid provisioner key length. Key should be {} bytes long but was {} bytes long", PROVISIONER_KEY_LENGTH, key_length))
+    }
+}
+
 /// Request amount of tokens
 pub(crate) fn request_token_amt(
     action: &str,
@@ -280,6 +296,19 @@ pub(crate) fn request_gas_price() -> anyhow::Result<Lux> {
     Ok(*price)
 }
 
+/// Request provisioner key
+pub(crate) fn request_provisioner_key() -> anyhow::Result<String> {
+    // let the user input the provisioner key
+    let q = Question::input("key")
+        .message("Please enter the provisioner key:")
+        .validate_on_key(|pkey, _| check_valid_pkey(pkey).is_ok())
+        .validate(|pkey, _| check_valid_pkey(pkey))
+        .build();
+
+    let a = requestty::prompt_one(q)?;
+    Ok(a.as_string().expect("answer to be a string").to_owned())
+}
+
 /// Request Dusk block explorer to be opened
 pub(crate) fn launch_explorer(url: String) -> Result<()> {
     let q = requestty::Question::confirm("launch")

src/lib.rs

@@ -43,3 +43,5 @@ pub const MIN_CONVERTIBLE: Dusk = Dusk::new(1);
 pub const EPOCH: u64 = 2160;
 /// Max addresses the wallet can store
 pub const MAX_ADDRESSES: usize = 255;
+/// The length of a provisioner key
+pub const PROVISIONER_KEY_LENGTH: usize = 96;