Want to _really_ know Ethereum down to the lowest bits? Read the technical specification! For a gentler introduction than the 'yellow paper' , check out the ' Ethereum beige paper'
buff.ly/2GbbpLz#ETHEREUM
#Blockchain can get pretty technical, even for our technical writer @MicahDameron. He recalls how he first made sense of the #Ethereum Yellow Paper and explains his motives for the Beige Paper––a more approachable version for the larger crypto community. media.consensys.net/rediscovering-…
events can have at most three parameters designated as 'indexed'. This allows us to search for these parameter values. It is also possible to filter for specific values via web3.
#ETHEREUM#smartcontracts
events are declared using the 'Event' keyword. Create many different events for debugging, or just to keep an eye on your contracts :)
event Deposit (
address indexed _from,
bytes32 indexed _id,
uint _value
);
#ETHEREUM#smartcontracts
Parents - is your teen texting about price action?
Watch out for these commonly used terms:
LOL - Lots Of Liquidity
WTF - What Time Frame
ASL - Asian Session Lows
LMAO - Lows Made Above Orderblock
STFU - Support Tested From Underneath
ROFL - Retail Orders Forming Lows
Events are defined within the smart contract, and can be emitted when something important happens.
Define:
event LogDepositMade(address accountAddress, uint amount);
Fire within a function:
LogDepositMade(msg.sender, msg.value);
#Ethereum
Solidity maps can contain other maps.
"A map to a map" is used within the ERC20 token standard:
mapping(address => mapping (address => uint256)) allowed;
#Ethereum
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