ant-act 0.0.5

Autonomi Community Token
Documentation 
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use autonomi::{
    client::payment::PaymentOption, Bytes, Chunk, ChunkAddress, Client, GraphEntry,
    GraphEntryAddress, PublicKey, SecretKey, XorName,
};
use futures::{future::Future, stream, StreamExt};
use ruint::aliases::U256;
use serde::{Deserialize, Serialize};

#[derive(Clone, Debug, Serialize, Deserialize)]
pub struct TokenInfo {
    pub symbol: String,
    pub name: String,
    pub decimals: u8,
}

pub trait ActExt {
    fn act_create(
        &self,
        name: String,
        symbol: String,
        decimals: u8,
        total_supply: U256,
        issuer_key: PublicKey,
        payment: &PaymentOption,
    ) -> impl Future<Output = Result<(PublicKey, XorName), String>> + Send;

    fn act_unspent(
        &self,
        pubkey: &PublicKey,
        spend: PublicKey,
    ) -> impl Future<Output = Result<(XorName, U256), String>> + Send;

    fn act_balance(
        &self,
        pubkey: &PublicKey,
        spends: Vec<PublicKey>,
    ) -> impl Future<Output = Result<U256, String>> + Send;

    fn act_token_info(
        &self,
        token_id: &XorName,
    ) -> impl Future<Output = Result<TokenInfo, String>> + Send;
}

impl ActExt for Client {
    async fn act_create(
        &self,
        name: String,
        symbol: String,
        decimals: u8,
        total_supply: U256,
        to: PublicKey,
        payment: &PaymentOption,
    ) -> Result<(PublicKey, XorName), String> {
        // create token info chunk
        let token_info_bytes = Bytes::from(
            serde_json::to_string(&TokenInfo {
                name,
                symbol,
                decimals,
            })
            .map_err(|e| format!("{}", e))?,
        );

        let token_info = Chunk::new(token_info_bytes.clone());
        let (_paid, token_info_address) = self
            .chunk_put(&token_info, payment.clone())
            .await
            .map_err(|e| format!("{}", e))?;

        println!("TokenInfo Chunk: {}", token_info_address);

        let token_id = token_info_address.xorname();
        println!("TokenId: {}", token_id);

        let genesis_owner = SecretKey::random();
        println!("Genesis owner: {:?}", genesis_owner);

        let genesis_owner_pubkey = genesis_owner.public_key();
        let genesis = GraphEntry::new(
            &genesis_owner,
            vec![],
            token_id.0.clone(),
            vec![(to, total_supply.to_be_bytes())], // all output to issuer
        );
        let (_paid, genesis_address) = self
            .graph_entry_put(genesis, payment.clone())
            .await
            .map_err(|e| format!("{}", e))?;

        println!("Genesis GraphEntry: {}", genesis_address);
        let genesis_spend = *genesis_address.owner();

        assert_eq!(genesis_owner_pubkey, genesis_spend);

        Ok((genesis_spend, *token_id))
    }

    async fn act_unspent(
        &self,
        output: &PublicKey,
        spend: PublicKey,
    ) -> Result<(XorName, U256), String> {
        let tx = self
            .graph_entry_get(&GraphEntryAddress::new(spend))
            .await
            .map_err(|e| format!("{}", e))?;

        let (balance, overflow) = tx
            .descendants
            .iter()
            .filter(|(pk, _data)| pk == output)
            .map(|(_pk, data)| U256::from_be_bytes(*data))
            .fold((U256::ZERO, false), |(sum, any_overflow), n| {
                let (added, this_overflow) = sum.overflowing_add(n);
                (added, any_overflow || this_overflow)
            });

        match overflow {
            false => Ok((XorName(tx.content), balance)),
            true => Err("Overflow.".into()),
        }
    }

    async fn act_balance(
        &self,
        pubkey: &PublicKey,
        spends: Vec<PublicKey>,
    ) -> Result<U256, String> {
        let stream = stream::iter(spends);

        stream
            .fold(Ok(U256::ZERO), |sum_res, spend_pk| async move {
                let (_token_id, unsp) = self.act_unspent(pubkey, spend_pk).await?;

                match sum_res?.overflowing_add(unsp) {
                    (added, false) => Ok(added),
                    (_, true) => Err("Overflow.".into()),
                }
            })
            .await
    }

    async fn act_token_info(&self, token_id: &XorName) -> Result<TokenInfo, String> {
        let token_info_address = ChunkAddress::new(*token_id);

        let chunk = self
            .chunk_get(&token_info_address)
            .await
            .map_err(|e| format!("{}", e))?;

        let token_info: TokenInfo =
            serde_json::from_slice(chunk.value()).map_err(|e| format!("{}", e))?;

        Ok(token_info)
    }

    //	/// Returns rest amount
    //	pub async fn act_spend(from: PublicKey, from_spends: Vec<PublicKey>, amount: U256, to: PublicKey, rest_to: PublicKey) -> Result<U256, String> {
    //
    //	}
}