Swap improvements #1032

Job	Run time
Compilation for NanoS, X, S+, and Stax (nanos, $NANOS_SDK)	1m 42s
Compilation for NanoS, X, S+, and Stax (nanox, $NANOX_SDK)	1m 41s
Compilation for NanoS, X, S+, and Stax (nanosp, $NANOSP_SDK)	1m 39s
Compilation for NanoS, X, S+, and Stax (stax, $STAX_SDK)	2m 22s
Unit test	1m 56s
Tests with the JS library	1m 42s
Tests (nanos)	7m 47s
Tests on mainnet (nanos)	44s
Tests (nanox)	11m 0s
Tests with the Python library and legacy Bitcoin app	42s
Tests on mainnet (nanox)	41s
Tests (nanosp)	14m 8s
Tests on mainnet (nanosp)	38s
Tests (stax)	48m 45s
Tests on mainnet (stax)	30s
Tests for rust client library	6m 52s
	1h 42m 49s

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