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      On this page
        • addressFromRecipient(Address|Alias): Address
        • assetBalance
        • assetInfo
        • blockInfoByHeight
        • calculateAssetId
        • calculateLeaseId
        • scriptHash
        • transactionHeightById
        • transferTransactionById
        • wavesBalance
      waves_logo Docs

          # Blockchain functions

          Name Description Complexity
          addressFromRecipient(Address|Alias): Address Gets the corresponding address of the alias 5
          assetBalance(Address|Alias, ByteVector): Int Gets account balance by token ID 10
          assetInfo(ByteVector): Asset|Unit Gets the information about a token 15
          blockInfoByHeight(Int): BlockInfo|Unit Gets the information about a block by the block height 5
          calculateAssetId(Issue): ByteVector Calculates ID of the token formed by the Issue structure when executing the callable function 10
          calculateLeaseId(Lease): ByteVector Calculates ID of the lease formed by the Lease structure when executing the callable function 1
          scriptHash(Address|Alias): ByteVector|Unit Returns BLAKE2b-256 (opens new window) hash of the script assigned to a given account 200
          transactionHeightById(ByteVector): Int|Unit Gets the block height of a transaction 20
          transferTransactionById(ByteVector): TransferTransaction|Unit Gets the data of a transfer transaction 60
          wavesBalance(Address|Alias): BalanceDetails Gets account balance in WAVES 10

          # addressFromRecipient(Address|Alias): Address

          Gets the corresponding address of the alias.

          addressFromRecipient(AddressOrAlias: Address|Alias): Address
          

          For a description of the return value, see the Address article.

          # Parameters

          Parameter Description
          AddressOrAlias: Address|Alias
          Address or alias, usually tx.recipient

          # Examples

          let address =Address(base58'3NADPfTVhGvVvvRZuqQjhSU4trVqYHwnqjF')
          addressFromRecipient(address)
          

          # assetBalance

          Gets account balance by token ID.

          assetBalance(addressOrAlias: Address|Alias, assetId: ByteVector): Int
          

          # Parameters

          Parameter Description
          addressOrAlias: Address|Alias Address or alias of the account
          assetId: ByteVector Token ID

          # assetInfo

          Gets the information about a token.

          assetInfo(id: ByteVector): Asset|Unit
          

          For a description of the return value, see the Asset article.

          # Parameters

          Parameter Description
          id: ByteVector ID of the token

          # Example

          let bitcoinId = base58'8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS'
          let x = match assetInfo(bitcoinId) {
              case asset:Asset =>
                  asset.decimals # 8
              case _ => throw("Can't find asset")
          }
          

          # blockInfoByHeight

          Gets the information about a block by the block height.

          blockInfoByHeight(height: Int): BlockInfo|Unit
          

          For a description of the return value, see the BlockInfo article.

          # Parameters

          Parameter Description
          height: Int Block height

          # Example

          let x = match blockInfoByHeight(1234567) {
              case block:BlockInfo =>
                  block.generator.toString() # "3P38Z9aMhGKAWnCiyMW4T3PcHcRaTAmTztH"
              case _ => throw("Can't find block")
          }
          

          # calculateAssetId

          Calculates ID of the token formed by the Issue structure when executing the callable function.

          calculateAssetId(issue: Issue): ByteVector
          

          # Parameters

          Parameter Description
          issue: Issue Structure that sets the parameters of the token issue

          # Example

          {-# STDLIB_VERSION 5 #-}
          {-# CONTENT_TYPE DAPP #-}
          {-# SCRIPT_TYPE ACCOUNT #-}
            
          @Callable(inv)
          func issueAndId() = {
            let issue = Issue("CryptoRouble", "Description", 1000, 2, true)
            let id = calculateAssetId(issue)
            (
              [
                issue,
                BinaryEntry("id", id)
              ],
              unit
            )
          }
          

          # calculateLeaseId

          Calculates ID of the lease formed by the Lease structure when executing the callable function.

          calculateLeaseId(lease: Lease): ByteVector
          

          # Parameters

          Parameter Description
          lease: Lease Structure that sets the lease parameters

          # Example

          {-# STDLIB_VERSION 5 #-}
          {-# CONTENT_TYPE DAPP #-}
          {-# SCRIPT_TYPE ACCOUNT #-}
            
          @Callable(i)
          func foo() = {
            let lease = Lease(Alias("merry"),100000000)
            let id = calculateLeaseId(lease)
            (
              [
                lease,
                BinaryEntry("lease", id)
              ],
              unit
            )
          }
          

          # scriptHash

          Returns BLAKE2b-256 (opens new window) hash of the script assigned to a given account. Returns unit if there is no script.

          The function can be used to verify that the script is exactly the same as expected.

          scriptHash(addressOrAlias: Address|Alias): ByteVector|Unit
          

          # Parameters

          Parameter Description
          addressOrAlias: Address|Alias Address or alias of the account

          # Example

          let addr = Address(base58'3MxBZbnN8Z8sbYjjL5N3oG5C8nWq9NMeCEm')
          
          scriptHash(addr) # Returns base58'G6ihnWN5mMedauCgNa8TDrSKWACPJKGQyYagmMQhPuja'
          

          # transactionHeightById

          Gets the block height of a transaction.

          transactionHeightById(id: ByteVector): Int|Unit
          

          # Parameters

          Parameter Description
          id: ByteVector ID of the transaction

          # Example

          let bitcoinId = base58'8LQW8f7P5d5PZM7GtZEBgaqRPGSzS3DfPuiXrURJ4AJS'
          let x = match transactionHeightById(bitcoinId) {
              case h:Int => h # 257457
              case _ => throw("Can't find transaction")
          }
          

          # transferTransactionById

          Gets the data of a transfer transaction.

          transferTransactionById(id: ByteVector): TransferTransaction|Unit
          

          For a description of the return value, see the TransferTransaction article.

          # Parameters

          Parameter Description
          id: ByteVector ID of the transfer transaction

          # Example

          let transferId = base58'J2rcMzCWCZ1P3SFZzvz9PR2NtBjomDh57HTcqptaAJHK'
          let x = match transferTransactionById(transferId) {
              case ttx:TransferTransaction =>
                  ttx.amount # 3500000000
              case _ => throw("Can't find transaction")
          }
          

          # wavesBalance

          Gets all types of WAVES balances. For description of balance types, see the Account Balance article.

          wavesBalance(addressOrAlias: Address|Alias): BalanceDetails
          

          For a description of the return value, see the BalanceDetails article.

          # Parameters

          Parameter Description
          addressOrAlias: Address|Alias Address or alias of the account
          Account Data Storage Functions
          Byte Array Functions
          Account Data Storage Functions
          Byte Array Functions