84 lines
2.8 KiB
Rust
84 lines
2.8 KiB
Rust
//! encode and decode Payment URI
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use crate::coinconfig::CoinConfig;
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use serde::{Deserialize, Serialize};
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use std::convert::TryFrom;
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use std::str::FromStr;
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use zcash_client_backend::address::RecipientAddress;
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use zcash_client_backend::zip321::{Payment, TransactionRequest};
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use zcash_primitives::memo::Memo;
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use zcash_primitives::transaction::components::Amount;
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/// Build a payment URI
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/// # Arguments
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/// * `address`: recipient address
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/// * `amount`: amount in zats
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/// * `memo`: memo text
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pub fn make_payment_uri(address: &str, amount: u64, memo: &str) -> anyhow::Result<String> {
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let c = CoinConfig::get_active();
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let addr = RecipientAddress::decode(c.chain.network(), address)
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.ok_or_else(|| anyhow::anyhow!("Invalid address"))?;
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let payment = Payment {
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recipient_address: addr,
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amount: Amount::from_u64(amount).map_err(|_| anyhow::anyhow!("Invalid amount"))?,
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memo: Some(Memo::from_str(memo)?.into()),
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label: None,
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message: None,
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other_params: vec![],
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};
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let treq = TransactionRequest {
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payments: vec![payment],
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};
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let uri = treq
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.to_uri(c.chain.network())
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.ok_or_else(|| anyhow::anyhow!("Cannot build Payment URI"))?;
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let uri = format!("{}{}", c.chain.ticker(), &uri[5..]); // hack to replace the URI scheme
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Ok(uri)
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}
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/// Decode a payment uri
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/// # Arguments
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/// * `uri`: payment uri
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pub fn parse_payment_uri(uri: &str) -> anyhow::Result<PaymentURI> {
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let c = CoinConfig::get_active();
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let scheme = c.chain.ticker();
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let scheme_len = scheme.len();
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if uri[..scheme_len].ne(scheme) {
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anyhow::bail!("Invalid Payment URI: Invalid scheme");
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}
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let uri = format!("zcash{}", &uri[scheme_len..]); // hack to replace the URI scheme
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let treq = TransactionRequest::from_uri(c.chain.network(), &uri)
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.map_err(|e| anyhow::anyhow!("Invalid Payment URI: {:?}", e))?;
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if treq.payments.len() != 1 {
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anyhow::bail!("Invalid Payment URI: Exactly one payee expected")
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}
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let payment = &treq.payments[0];
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let memo = match payment.memo {
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Some(ref memo) => {
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let memo = Memo::try_from(memo.clone())?;
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match memo {
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Memo::Text(text) => Ok(text.to_string()),
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Memo::Empty => Ok(String::new()),
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_ => Err(anyhow::anyhow!("Invalid Memo")),
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}
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}
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None => Ok(String::new()),
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}?;
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let payment = PaymentURI {
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address: payment.recipient_address.encode(c.chain.network()),
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amount: u64::from(payment.amount),
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memo,
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};
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// let payment_json = serde_json::to_string(&payment)?;
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//
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Ok(payment)
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}
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#[derive(Serialize, Deserialize)]
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pub struct PaymentURI {
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pub address: String,
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pub amount: u64,
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pub memo: String,
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}
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