62 lines
2.8 KiB
Rust
62 lines
2.8 KiB
Rust
// SPDX-License-Identifier: CC0-1.0
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use bitcoin::consensus::{encode, FromHexError};
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use bitcoin::key::WPubkeyHash;
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use bitcoin::script::{self, ScriptExt, ScriptBufExt};
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use bitcoin::ScriptBuf;
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fn main() {
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let pk = "b472a266d0bd89c13706a4132ccfb16f7c3b9fcb".parse::<WPubkeyHash>().unwrap();
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let script_code = script::p2wpkh_script_code(pk);
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let hex = script_code.to_hex_string();
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let parsed = ScriptBuf::from_hex(&hex).unwrap();
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assert_eq!(parsed, script_code);
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// Writes the script as human-readable eg, OP_DUP OP_HASH160 OP_PUSHBYTES_20 ...
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let _human_readable = format!("{}", script_code);
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// We do not implement parsing scripts from human-readable format.
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// let parsed = s.parse::<ScriptBuf>().unwrap();
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// This does not include the length prefix.
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let hex_lower_hex_trait = format!("{:x}", script_code);
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println!("hex created using `LowerHex`: {}", hex_lower_hex_trait);
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// But `deserialize_hex` requires the length prefix.
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let decoded: Result<ScriptBuf, FromHexError> = encode::deserialize_hex(&hex_lower_hex_trait);
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assert!(decoded.is_err());
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// FIXME: The inherent functions are in `bitcoin` so have access to consensus encoding.
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// This also does not include the length prefix.
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let hex_inherent = script_code.to_hex_string();
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println!("hex created using inherent `to_hex_string`: {}", hex_inherent);
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let parsed = ScriptBuf::from_hex(&hex_inherent).unwrap();
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assert_eq!(parsed, script_code);
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// Cannot parse the output of `to_hex_string` using `deserialize_hex` because no length prefix.
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assert!(encode::deserialize_hex::<ScriptBuf>(&hex_inherent).is_err());
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// Encode/decode using `consensus::encode` functions.
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// This does include the length prefix.
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let encoded = encode::serialize_hex(&script_code);
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println!("hex created using consensus::encode::serialize_hex: {}", encoded);
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let decoded: ScriptBuf = encode::deserialize_hex(&encoded).unwrap();
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assert_eq!(decoded, script_code);
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// And we cannot mix these to calls because `serialize_hex` includes the length prefix
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// but `from_hex` expects no length prefix.
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let encoded = encode::serialize_hex(&script_code);
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let decoded = ScriptBuf::from_hex(&encoded).unwrap();
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assert_ne!(decoded, script_code);
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// Encode/decode using a byte vector.
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let encoded = encode::serialize(&script_code);
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assert_eq!(&encoded[1..], script_code.as_bytes()); // Shows that prefix is the first byte.
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let decoded: ScriptBuf = encode::deserialize(&encoded).unwrap();
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assert_eq!(decoded, script_code);
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// to/from bytes excludes the prefix, these are not encoding/decoding functions so this is sane.
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let bytes = script_code.to_bytes();
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let got = ScriptBuf::from_bytes(bytes);
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assert_eq!(got, script_code);
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}
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