68abfdb0b9 Better downflow of information in `psbt::Error` (Arturo Marquez) Pull request description: See third point in https://github.com/rust-bitcoin/rust-bitcoin/issues/837 Closes: https://github.com/rust-bitcoin/rust-bitcoin/issues/1589 ACKs for top commit: apoelstra: ACK 68abfdb0b9 tcharding: ACK 68abfdb0b9 Tree-SHA512: 8accfd6a1ae9c413b48a5a5861ec036a166a5cd5a73ee242169ee9d34a91f85f4f152e2feba628e20b8b89d7177694c3d2af60551a37c2d9c9a4408036f55262
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