Add psbt example

Add an example PSBT workflow. The workflow we simulate is that of a setup using a watch-only online wallet (contains only public keys) and a cold-storage wallet (contains the private keys). We create and update a PSBT using the watch-only wallet then pass the PSBT to the cold-storage wallet to sign. Co-authored-by: Dan Gould <d@ngould.dev>
rust-bitcoin · Jun 30, 2022 · a7f2d21 · a7f2d21
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diff --git a/Cargo.toml b/Cargo.toml
@@ -57,3 +57,7 @@ name = "bip32"
 [[example]]
 name = "handshake"
 required-features = ["std"]
+
+[[example]]
+name = "ecdsa-psbt"
+required-features = ["std", "bitcoinconsensus"]