Merge pull request #304 from ElementsProject/ct-discount #837

Job	Run time
unit-tests	4m 22s
integration-tests (bitcoin-cln)	26m 45s
integration-tests (bitcoin-lnd)	26m 46s
integration-tests (liquid-cln)	25m 58s
integration-tests (liquid-lnd)	26m 34s
integration-tests (misc-integration)	26m 35s
integration-tests (lwk-cln)	30m 35s
integration-tests (lwk-lnd)	25m 42s
	3h 13m 17s

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