Algorithm 2: Blockchain-based network for the healthcare metaverse
Input: Patient P, Doctor D, Consultation query Cq, Caregiver Cg; and Prediction output O(XAI) Output: Initiate treatment in metaverse IDVEnv (Virtual Environment) and activate patient environment
1.	Procedure: Blockchain_metahealth()
2.	For Cq by P do Response←Fetch_suitable(D) If (IDP∈BCP) then Assign Caregiver (BCCg) Else Display (“Patient does not exist, please register”) End If End for
3.	Execute_Contract (IDP, tnp, Sig(P)) Execute_Contract (IDCg, tncg, Sig (Cg))
4.	If Dk←Sig (D) then Execute−Contract (IDD, tnd) Setup VEnv←(IDP, IDD, IDCg, IDVEnv) Execute−Contract (IDVEnv) Main BC←O(XAI) Order Tn on Main BC (IDp, tnp, T, Sig(P)←Verify (Sig (D), Tn, D) Order Tn on Main BC (IDp, tnp, T, Sig(P)←Verify (Sig (cg), Tn, Cg) End If
5.	End.
	Note: IDP denotes Id of patient, BCP: blockchain of patient, BCCg: blockchain of caregiver, IDCg: Id of caregiver, tncg: transaction pay load of caregiver, IDD: Id of doctor, IDVEnv: Id of virtual environment.