Fix amount parsing in GetTransactionDetail #48

Job	Run time
Prepare	4s
Test - stable toolchain (minimal)	7s
Docs - stable toolchain (recent)	5s
Test - stable toolchain (recent)	9s
Integration tests - stable toolchain (26_0)	4s
Integration tests - stable toolchain (25_2)	3s
Integration tests - stable toolchain (25_1)	7s
Integration tests - stable toolchain (25_0)	7s
Integration tests - stable toolchain (24_2)	9s
Integration tests - stable toolchain (24_1)	6s
Integration tests - stable toolchain (24_0_1)	7s
Integration tests - stable toolchain (23_2)	3s
Integration tests - stable toolchain (23_1)	7s
Integration tests - stable toolchain (23_0)	5s
Integration tests - stable toolchain (22_1)	6s
Integration tests - stable toolchain (22_0)	3s
Integration tests - stable toolchain (0_21_2)	7s
Integration tests - stable toolchain (0_20_2)	5s
Integration tests - stable toolchain (0_19_1)	7s
Integration tests - stable toolchain (0_18_1)	9s
Integration tests - stable toolchain (0_17_1)	4s
Test - nightly toolchain (minimal)	12s
Lint - nightly toolchain (recent)	34s
Docs - nightly toolchain (recent)	13s
Test - nightly toolchain (recent)	15s
	3m 18s

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