Adds Txid to lighting-block-sync::convert

diff --git a/lightning-block-sync/src/convert.rs b/lightning-block-sync/src/convert.rs
index 37b2c4323972fb1152fb27b1ee2c195859806104..e8e1427bdb654ffa432d069faf37457fc5a74cea 100644 (file)
--- a/lightning-block-sync/src/convert.rs
+++ b/lightning-block-sync/src/convert.rs
@@ -4,7 +4,7 @@ use crate::utils::hex_to_uint256;
 
 use bitcoin::blockdata::block::{Block, BlockHeader};
 use bitcoin::consensus::encode;
-use bitcoin::hash_types::{BlockHash, TxMerkleNode};
+use bitcoin::hash_types::{BlockHash, TxMerkleNode, Txid};
 use bitcoin::hashes::hex::{ToHex, FromHex};
 
 use serde::Deserialize;
@@ -156,11 +156,37 @@ impl TryInto<(BlockHash, Option<u32>)> for JsonResponse {
        }
 }
 
+impl TryInto<Txid> for JsonResponse {
+       type Error = std::io::Error;
+       fn try_into(self) -> std::io::Result<Txid> {
+               match self.0.as_str() {
+                       None => Err(std::io::Error::new(
+                               std::io::ErrorKind::InvalidData,
+                               "expected JSON string",
+                       )),
+                       Some(hex_data) => match Vec::<u8>::from_hex(hex_data) {
+                               Err(_) => Err(std::io::Error::new(
+                                       std::io::ErrorKind::InvalidData,
+                                       "invalid hex data",
+                               )),
+                               Ok(txid_data) => match encode::deserialize(&txid_data) {
+                                       Err(_) => Err(std::io::Error::new(
+                                               std::io::ErrorKind::InvalidData,
+                                               "invalid txid",
+                                       )),
+                                       Ok(txid) => Ok(txid),
+                               },
+                       },
+               }
+       }
+}
+
 #[cfg(test)]
 pub(crate) mod tests {
        use super::*;
        use bitcoin::blockdata::constants::genesis_block;
        use bitcoin::consensus::encode;
+       use bitcoin::hashes::Hash;
        use bitcoin::network::constants::Network;
 
        /// Converts from `BlockHeaderData` into a `GetHeaderResponse` JSON value.
@@ -469,4 +495,50 @@ pub(crate) mod tests {
                        },
                }
        }
+
+       #[test]
+       fn into_txid_from_json_response_with_unexpected_type() {
+               let response = JsonResponse(serde_json::json!({ "result": "foo" }));
+               match TryInto::<Txid>::try_into(response) {
+                       Err(e) => {
+                               assert_eq!(e.kind(), std::io::ErrorKind::InvalidData);
+                               assert_eq!(e.get_ref().unwrap().to_string(), "expected JSON string");
+                       }
+                       Ok(_) => panic!("Expected error"),
+               }
+       }
+
+       #[test]
+       fn into_txid_from_json_response_with_invalid_hex_data() {
+               let response = JsonResponse(serde_json::json!("foobar"));
+               match TryInto::<Txid>::try_into(response) {
+                       Err(e) => {
+                               assert_eq!(e.kind(), std::io::ErrorKind::InvalidData);
+                               assert_eq!(e.get_ref().unwrap().to_string(), "invalid hex data");
+                       }
+                       Ok(_) => panic!("Expected error"),
+               }
+       }
+
+       #[test]
+       fn into_txid_from_json_response_with_invalid_txid_data() {
+               let response = JsonResponse(serde_json::json!("abcd"));
+               match TryInto::<Txid>::try_into(response) {
+                       Err(e) => {
+                               assert_eq!(e.kind(), std::io::ErrorKind::InvalidData);
+                               assert_eq!(e.get_ref().unwrap().to_string(), "invalid txid");
+                       }
+                       Ok(_) => panic!("Expected error"),
+               }
+       }
+
+       #[test]
+       fn into_txid_from_json_response_with_valid_txid_data() {
+               let target_txid = Txid::from_slice(&[1; 32]).unwrap();
+               let response = JsonResponse(serde_json::json!(encode::serialize_hex(&target_txid)));
+               match TryInto::<Txid>::try_into(response) {
+                       Err(e) => panic!("Unexpected error: {:?}", e),
+                       Ok(txid) => assert_eq!(txid, target_txid),
+               }
+       }
 }