Algorithm A4: Supervise cross-chain smart contract B(SCSC-B)

InputData; N; SCSC-A; skp; T; DATA 1: func Decrypt(DATA)// Decrypt DATA with skp { For t in range (m)   If DATA processing:      Get user private key skp     Decrypt DATA, get Dn, H(N) } 2: func Get(N)// Get N, pass S { For t in range (m)     If   S processing:         Use the same H(N) for data encryption If      data exchange: Transfer(SCSC-B) Return SCSC-A$\to$S; N$\to$SCSC-B// Exchange N and S to obtain Return   false } 3: func Get(Data)// Decrypt to get Data { For t in range (m) If  Dn processing:    Decrypt Dn to get Data    Hash Ds to verify whether it has been tampered with    Return ture Return false } 4: func Transport(Data) { For t in range (m) If Data verification without tampering    Return Regulatory Authority and ture Return false } 5: func Self-defense(T, SCSC-A)// Anti-attack design { For t in range (m) If   Step 4 Back ture     Send (V)$\to$SCSC-A If Attack handling:    Received the attack information of SCSC-A    Return Data is automatically encrypted }