Comm_Read

Env::Comm_Read

uint32_t Comm_Read(void* pBuf, uint32_t nSize, uint32_t* pCookie, uint8_t bKeep);

Loads the value of the contract variable denoted by {nType, [pKey, nKey]} into buffer pointed to by pVal.

Parameters

• pKey : pointer to the key. Key could be any kind of data
• nKey : the size of the key
• pVal : pointer to the value buffer
• nVal : the size of the buffer
• nType : can be anything. Means - the contract can read the auxiliary variables (such as total locked funds) that BVM uses for it.

Return value

• the actual (non-truncated) value size or 0 if such a variable doesn't exist.

Notes

• none

Example