ergo-node-interface 0.5.0

use crate::node_interface::{
    is_mainnet_address, is_testnet_address, NodeError, NodeInterface, Result,
};
use crate::{BlockHeight, NanoErg, P2PKAddressString};
use ergo_lib::ergotree_ir::chain::ergo_box::ErgoBox;
use serde_json::from_str;
use serde_with::serde_as;
use serde_with::NoneAsEmptyString;

impl NodeInterface {
    /// Get all addresses from the node wallet
    pub fn wallet_addresses(&self) -> Result<Vec<P2PKAddressString>> {
        let endpoint = "/wallet/addresses";
        let res = self.send_get_req(endpoint)?;

        let mut addresses: Vec<String> = vec![];
        for segment in res
            .text()
            .expect("Failed to get addresses from wallet.")
            .split('\"')
        {
            let seg = segment.trim();
            if is_mainnet_address(seg) || is_testnet_address(seg) {
                addresses.push(seg.to_string());
            }
        }
        if addresses.is_empty() {
            return Err(NodeError::NoAddressesInWallet);
        }
        Ok(addresses)
    }

    /// Acquires unspent boxes from the node wallet
    pub fn unspent_boxes(&self) -> Result<Vec<ErgoBox>> {
        let endpoint = "/wallet/boxes/unspent?minConfirmations=0&minInclusionHeight=0";
        let res = self.send_get_req(endpoint);
        let res_json = self.parse_response_to_json(res)?;

        let mut box_list = vec![];

        for i in 0.. {
            let box_json = &res_json[i]["box"];
            if box_json.is_null() {
                break;
            } else if let Ok(ergo_box) = from_str(&box_json.to_string()) {
                box_list.push(ergo_box);
            }
        }
        Ok(box_list)
    }

    /// Returns unspent boxes from the node wallet ordered from highest to
    /// lowest nanoErgs value.
    pub fn unspent_boxes_sorted(&self) -> Result<Vec<ErgoBox>> {
        let mut boxes = self.unspent_boxes()?;
        boxes.sort_by(|a, b| b.value.as_u64().partial_cmp(a.value.as_u64()).unwrap());

        Ok(boxes)
    }

    /// Returns a sorted list of unspent boxes which cover at least the
    /// provided value `total` of nanoErgs.
    /// Note: This box selection strategy simply uses the largest
    /// value holding boxes from the user's wallet first.
    pub fn unspent_boxes_with_min_total(&self, total: NanoErg) -> Result<Vec<ErgoBox>> {
        self.consume_boxes_until_total(total, &self.unspent_boxes_sorted()?)
    }

    /// Returns a list of unspent boxes which cover at least the
    /// provided value `total` of nanoErgs.
    /// Note: This box selection strategy simply uses the oldest unspent
    /// boxes from the user's full node wallet first.
    pub fn unspent_boxes_with_min_total_by_age(&self, total: NanoErg) -> Result<Vec<ErgoBox>> {
        self.consume_boxes_until_total(total, &self.unspent_boxes()?)
    }

    /// Given a `Vec<ErgoBox>`, consume each ErgoBox into a new list until
    /// the `total` is reached. If there are an insufficient number of
    /// nanoErgs in the provided `boxes` then it returns an error.
    fn consume_boxes_until_total(&self, total: NanoErg, boxes: &[ErgoBox]) -> Result<Vec<ErgoBox>> {
        let mut count = 0;
        let mut filtered_boxes = vec![];
        for b in boxes {
            if count >= total {
                break;
            } else {
                count += b.value.as_u64();
                filtered_boxes.push(b.clone());
            }
        }
        if count < total {
            return Err(NodeError::InsufficientErgsBalance());
        }
        Ok(filtered_boxes)
    }

    /// Acquires the unspent box with the highest value of Ergs inside
    /// from the wallet
    pub fn highest_value_unspent_box(&self) -> Result<ErgoBox> {
        let boxes = self.unspent_boxes()?;

        // Find the highest value amount held in a single box in the wallet
        let highest_value = boxes.iter().fold(0, |acc, b| {
            if *b.value.as_u64() > acc {
                *b.value.as_u64()
            } else {
                acc
            }
        });

        for b in boxes {
            if *b.value.as_u64() == highest_value {
                return Ok(b);
            }
        }
        Err(NodeError::NoBoxesFound)
    }

    /// Acquires the unspent box with the highest value of Ergs inside
    /// from the wallet and serializes it
    pub fn serialized_highest_value_unspent_box(&self) -> Result<String> {
        let ergs_box_id: String = self.highest_value_unspent_box()?.box_id().into();
        self.serialized_box_from_id(&ergs_box_id)
    }

    /// Acquires unspent boxes which cover `total` amount of nanoErgs
    /// from the wallet and serializes the boxes
    pub fn serialized_unspent_boxes_with_min_total(&self, total: NanoErg) -> Result<Vec<String>> {
        let boxes = self.unspent_boxes_with_min_total(total)?;
        let mut serialized_boxes = vec![];
        for b in boxes {
            serialized_boxes.push(self.serialized_box_from_id(&b.box_id().into())?);
        }
        Ok(serialized_boxes)
    }

    /// Get the current nanoErgs balance held in the Ergo Node wallet
    pub fn wallet_nano_ergs_balance(&self) -> Result<NanoErg> {
        let endpoint = "/wallet/balances";
        let res = self.send_get_req(endpoint);
        let res_json = self.parse_response_to_json(res)?;

        let balance = res_json["balance"].clone();

        if balance.is_null() {
            Err(NodeError::NodeSyncing)
        } else {
            balance
                .as_u64()
                .ok_or_else(|| NodeError::FailedParsingNodeResponse(res_json.to_string()))
        }
    }

    /// Get wallet status /wallet/status
    pub fn wallet_status(&self) -> Result<WalletStatus> {
        let endpoint = "/wallet/status";
        let res = self.send_get_req(endpoint);
        let res_json = self.parse_response_to_json(res)?;

        if let Ok(wallet_status) = from_str(&res_json.to_string()) {
            Ok(wallet_status)
        } else {
            Err(NodeError::FailedParsingWalletStatus(res_json.pretty(2)))
        }
    }

    /// Unlock wallet
    pub fn wallet_unlock(&self, password: &str) -> Result<bool> {
        let endpoint = "/wallet/unlock";
        let body = object! {
            pass: password,
        };

        let res = self.send_post_req(endpoint, body.to_string())?;

        if res.status().is_success() {
            Ok(true)
        } else {
            let json = self.parse_response_to_json(Ok(res))?;
            Err(NodeError::BadRequest(json["error"].to_string()))
        }
    }
}

#[serde_as]
#[derive(serde::Deserialize, serde::Serialize)]
pub struct WalletStatus {
    #[serde(rename = "isInitialized")]
    pub initialized: bool,
    #[serde(rename = "isUnlocked")]
    pub unlocked: bool,
    #[serde(rename = "changeAddress")]
    #[serde_as(as = "NoneAsEmptyString")]
    pub change_address: Option<P2PKAddressString>,
    #[serde(rename = "walletHeight")]
    pub height: BlockHeight,
    #[serde(rename = "error")]
    pub error: Option<String>,
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parsing_wallet_status_unlocked() {
        let node_response_json_str = r#"{
          "isInitialized": true,
          "isUnlocked": true,
          "changeAddress": "3Wwc4HWrTcYkRycPNhEUSwNNBdqSBuiHy2zFvjMHukccxE77BaX3",
          "walletHeight": 251965,
          "error": ""
        }"#;
        let t: WalletStatus = serde_json::from_str(node_response_json_str).unwrap();
        assert_eq!(t.height, 251965);
    }

    #[test]
    fn test_parsing_wallet_status_locked() {
        let node_response_json_str = r#"{
          "isInitialized": true,
          "isUnlocked": false,
          "changeAddress": "",
          "walletHeight": 251965,
          "error": ""
        }"#;
        let t: WalletStatus = serde_json::from_str(node_response_json_str).unwrap();
        assert_eq!(t.change_address, None);
        assert_eq!(t.height, 251965);
    }
}