Algorithm 2. View the existing policy.

Input: policyId

Output: Policy

async viewPolicy(ctx, policyId)

{

$letpolicyAsBytes=awaitctx.stub.getState(policyId);$

$if(!policyAsBytes||policyAsBytes.length==0)\{$

$thrownewError(\mathrm{\prime }\{policyId\}doesnotexist‘);$

}

return policyAsBytes.toString();

}