pragma solidity ^0.4.2;

import "LibString.sol";

import "LibInt.sol";

library LibZkg {

using LibString for *;

using LibInt for *;

//EthLog的EthCallId定义

function tx1To1CallId() internal constant returns(uint32) {

return 0x5A4B47; //一对一匿名可监管交易验证

}

function to1To1Verify(

string inputRt0, string inputRt1,

string inputSn0, string inputSn1,

string outputCm0, string outputCm1,

uint64 vpubOld,

uint64 vpubNew,

string g,

string gpk,

string gData,

string proof

)

internal constant

returns(uint)

{

/*

string memory params = "";

params = params.concat(inputRt0, inputRt1);

params = params.concat(inputSn0, inputSn1);

params = params.concat(outputCm0, outputCm1);

params = params.concat(g, gpk);

return callEvm(

params,

vpubOld, vpubNew,

gData,

proof

);

}

//调用底层的ethcall

function callEvm(

string params,

uint64 vpubOld,

uint64 vpubNew,

string gData,

string proof

)

internal constant

returns(uint)

{

uint32 callId = tx1To1CallId();

uint r;

assembly{

r := ethcall(callId, params,

vpubOld, vpubNew,

gData, proof, 0, 0, 0, 0)

}

return r;

}

}