70 lines
2.3 KiB
Markdown
70 lines
2.3 KiB
Markdown
Support Functions are inbuilt functions which provide some functionality or expose internals for speed and technical reasons.
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LOAD(variable)
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==============
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LOAD loads a variable which was previously stored in the blockchain using STORE function. Return type will be Uint64/String depending on what is stored.
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It will panic if the value does NOT exists
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Uint64 EXISTS(variable)
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=======================
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EXISTS return 1 if the variable is store in DB and 0 otherwise
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STORE(key variable, value variable)
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===================================
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STORE stores key and value in the DB. All storage state of the SC is accessible only from the SC which created it.
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Uint64 RANDOM()
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Uint64 RANDOM(limit Uin64)
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============================
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RANDOM returns a random using a PRNG seeded on BLID,SCID,TXID. First form gives a uint64, second form returns
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random number in the range 0 - (limit), 0 is inclusive, limit is exclusive
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String SCID()
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==============
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Returns SMART CONTRACT ID which is currently running
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String BLID()
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Returns current BLOCK ID which contains current execution-in-progress TXID
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String TXID()
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=============
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Returns current TXID which is execution-in-progress.
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Uint64 BLOCK_HEIGHT()
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=====================
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Returns current chain height of BLID()
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Uint64 BLOCK_TOPOHEIGHT()
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===========================
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Returns current topoheight of BLID()
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String SIGNER()
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=================
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Returns address of who signed this transaction
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Uint64 IS_ADDRESS_VALID(p String)
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=================================
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Returns 1 if address is valid, 0 otherwise
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String ADDRESS_RAW(p String)
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============================
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Returns address in RAW form as 33 byte keys, stripping away textual/presentation form. 2 address should always be compared in RAW form
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SEND_DERO_TO_ADDRESS(a String, amount Uint64)
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==============================================
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Sends amount DERO from SC DERO balance to a address which should be raw form. address must in string form DERO/DETO form
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If the SC does not have enough balance, it will panic
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ADD_VALUE(a String, amount Uint64)
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====================================
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Send specific number of token to specific account.
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If account is bring touched for the first time, it is done simply.
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If account is already initialized ( it already has some balance, but SC does not know how much). So, it gives additional balance homomorphically
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