Blockchain Ecosystem for Credit Transfer in Education

Algorithm 1

Secure math.

	Contract SecureMath
	Function secAdd
	Pass In: unsigned integer A and unsigned integer B
	Add A and B and pass value to C
	Require C to be greater than or equal to A
	Pass Out: unsigned integer C
	Endfunction
	Function secSub
	Pass In: unsigned integer A and unsigned integer B
	Subtract B and A and pass value to C
	Require B to be lesser than or equal to A
	Pass Out: unsigned integer C
	Endfunction
	Function secMul
	Pass In: unsigned integer A and unsigned integer B
	Multiply A and B and pass value to C
	Require A to be equal to or C/A equal to B
	Pass Out: unsigned integer C Endfunction
	Function secDiv
	Pass In: unsigned integer A and unsigned integer B
	Divide A and B and pass value to C
	Require B to be greater than 0
	Pass Out: unsigned integer C
	Endfunction