Fix amount parsing in GetTransactionDetail #50

Job	Run time
Docs - stable toolchain (recent)	19s
Prepare	2s
Test - stable toolchain (minimal)	41s
Test - stable toolchain (recent)	36s
Integration tests - stable toolchain (26_0)	1m 0s
Integration tests - stable toolchain (25_2)	1m 17s
Integration tests - stable toolchain (25_1)	1m 9s
Integration tests - stable toolchain (25_0)	46s
Integration tests - stable toolchain (24_2)	51s
Integration tests - stable toolchain (24_1)	1m 12s
Integration tests - stable toolchain (24_0_1)	59s
Integration tests - stable toolchain (23_2)	58s
Integration tests - stable toolchain (23_1)	55s
Integration tests - stable toolchain (23_0)	1m 13s
Integration tests - stable toolchain (22_1)	1m 8s
Integration tests - stable toolchain (22_0)	48s
Integration tests - stable toolchain (0_21_2)	46s
Integration tests - stable toolchain (0_20_2)	58s
Integration tests - stable toolchain (0_19_1)	55s
Integration tests - stable toolchain (0_18_1)	1m 7s
Integration tests - stable toolchain (0_17_1)	1m 0s
Lint - nightly toolchain (recent)	43s
Docs - nightly toolchain (recent)	25s
Test - nightly toolchain (minimal)	42s
Test - nightly toolchain (recent)	39s
	21m 9s

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