[Feature] Add a new contract that allows others to add/update/remove a token

contracts/ListedTokens_v2.cdc

@@ -0,0 +1,188 @@
+pub contract ListedTokens_v2 {
+  /****** Events ******/
+  pub event TokenAdded(key: String, name: String, displayName: String, symbol: String, address: Address)
+  pub event TokenUpdated(key: String, name: String, displayName: String, symbol: String, address: Address)
+  pub event TokenRemoved(key: String)
+
+  /****** Contract Variables ******/
+  access(contract) let _tokens: { String: TokenInfo }
+
+  pub let AdminStoragePath: StoragePath
+  pub let TokenProposerStoragePath: StoragePath
+
+  /****** Composite Type Definitions ******/
+  pub struct TokenInfo {
+    pub let name: String
+    pub let displayName: String
+    pub let symbol: String
+    pub let address: Address
+    pub let vaultPath: String
+    pub let receiverPath: String
+    pub let balancePath: String
+    access(contract) let creatorAddress: Address
+
+    init(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String, creatorAddress: Address) {
+      self.name = name
+      self.displayName = displayName
+      self.symbol = symbol
+      self.address = address
+      self.vaultPath = vaultPath
+      self.receiverPath = receiverPath
+      self.balancePath = balancePath
+      self.creatorAddress = creatorAddress
+    }
+  }
+
+  pub resource TokenProposer {
+    pub fun addToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String) {
+      ListedTokens_v2.addToken(
+        name: name, 
+        displayName: displayName, 
+        symbol: symbol, 
+        address: address, 
+        vaultPath: vaultPath, 
+        receiverPath: receiverPath, 
+        balancePath: balancePath, 
+        creatorAddress: self.owner!.address
+      )
+    }
+
+    pub fun updateToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String) {
+      let token = ListedTokens_v2.getToken(name: name, address: address)
+
+      if (self.owner!.address != token.creatorAddress) {
+        panic("Access denied. Only the proposer for listing this token and the admin are allowed to update it.")
+      }
+
+      ListedTokens_v2.updateToken(
+        name: name, 
+        displayName: displayName, 
+        symbol: symbol, 
+        address: address, 
+        vaultPath: vaultPath, 
+        receiverPath: receiverPath, 
+        balancePath: balancePath
+      )
+    }
+
+    pub fun removeToken(name: String, address: Address) {
+      let token = ListedTokens_v2.getToken(name: name, address: address)
+
+      if (self.owner!.address != token.creatorAddress) {
+        panic("Access denied. Only the proposer for listing this token and the admin are allowed to remove it.")
+      }
+
+      ListedTokens_v2.removeToken(name: name, address: address)
+    }
+  }
+
+  pub resource Admin {
+    pub fun addToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String) {
+      ListedTokens_v2.addToken(
+        name: name, 
+        displayName: displayName, 
+        symbol: symbol, 
+        address: address, 
+        vaultPath: vaultPath, 
+        receiverPath: receiverPath, 
+        balancePath: balancePath, 
+        creatorAddress: self.owner!.address
+      )
+    }
+
+    pub fun updateToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String) {
+      ListedTokens_v2.updateToken(
+        name: name, 
+        displayName: displayName, 
+        symbol: symbol, 
+        address: address, 
+        vaultPath: vaultPath, 
+        receiverPath: receiverPath, 
+        balancePath: balancePath
+      )
+    }
+
+    pub fun removeToken(name: String, address: Address) {
+      ListedTokens_v2.removeToken(name: name, address: address)
+    }
+  }
+
+  /****** Methods ******/
+  pub fun tokenExists(key: String): Bool {
+    return self._tokens.containsKey(key)
+  }
+
+  pub fun getTokenKey(name: String, address: Address): String {
+    return name.concat(".").concat(address.toString())
+  }
+
+  pub fun getTokens(): [TokenInfo] {
+    return self._tokens.values
+  }
+
+  pub fun getToken(name: String, address: Address): TokenInfo {
+    let key = self.getTokenKey(name: name, address: address)
+    return self._tokens[key] ?? panic("Token not found")
+  }
+
+  pub fun createTokenProposer(): @TokenProposer {
+    return <- create TokenProposer()
+  }
+
+  access(self) fun addToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String, creatorAddress: Address) {
+    let key = self.getTokenKey(name: name, address: address)
+
+    if (self.tokenExists(key: key)) {
+      panic("Token existed!")
+    }
+
+    self._tokens[key] = TokenInfo(
+      name: name,
+      displayName: displayName,
+      symbol: symbol,
+      address: address,
+      vaultPath: vaultPath,
+      receiverPath: receiverPath,
+      balancePath: balancePath,
+      creatorAddress: creatorAddress
+    )
+
+    emit TokenAdded(key: key, name: name, displayName: displayName, symbol: symbol, address: address)
+  }
+
+  access(self) fun updateToken(name: String, displayName: String, symbol: String, address: Address, vaultPath: String, receiverPath: String, balancePath: String) {
+    let key = self.getTokenKey(name: name, address: address)
+    let token = self._tokens[key] ?? panic("Token not found")
+
+    self._tokens[key] = TokenInfo(
+      name: name,
+      displayName: displayName,
+      symbol: symbol,
+      address: address,
+      vaultPath: vaultPath,
+      receiverPath: receiverPath,
+      balancePath: balancePath,
+      creatorAddress: token.creatorAddress
+    )
+
+    emit TokenUpdated(key: key, name: name, displayName: displayName, symbol: symbol, address: address)
+  }
+
+  access(self) fun removeToken(name: String, address: Address) {
+    let key = self.getTokenKey(name: name, address: address)
+    let token = self._tokens[key] ?? panic("Token not found")
+
+    self._tokens.remove(key: key)
+
+    emit TokenRemoved(key: key)
+  }
+
+  init () {
+    self._tokens = {}
+    self.AdminStoragePath = /storage/bloctoSwapListedTokensAdmin_v2
+    self.TokenProposerStoragePath = /storage/bloctoSwapTokenProposer
+
+    let admin <- create Admin()
+    self.account.save(<-admin, to: self.AdminStoragePath)
+  }
+}