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Diffstat (limited to 'docs/introduction-to-smart-contracts.rst')
| -rw-r--r-- | docs/introduction-to-smart-contracts.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/docs/introduction-to-smart-contracts.rst b/docs/introduction-to-smart-contracts.rst index c297a8ad..11e07292 100644 --- a/docs/introduction-to-smart-contracts.rst +++ b/docs/introduction-to-smart-contracts.rst @@ -80,7 +80,7 @@ registering with username and password - all you need is an Ethereum keypair. :: - pragma solidity ^0.4.0; + pragma solidity ^0.4.20; // should actually be 0.4.21 contract Coin { // The keyword "public" makes those variables @@ -107,7 +107,7 @@ registering with username and password - all you need is an Ethereum keypair. if (balances[msg.sender] < amount) return; balances[msg.sender] -= amount; balances[receiver] += amount; - Sent(msg.sender, receiver, amount); + emit Sent(msg.sender, receiver, amount); } } @@ -157,10 +157,10 @@ single account. .. index:: event The line ``event Sent(address from, address to, uint amount);`` declares -a so-called "event" which is fired in the last line of the function +a so-called "event" which is emitted in the last line of the function ``send``. User interfaces (as well as server applications of course) can -listen for those events being fired on the blockchain without much -cost. As soon as it is fired, the listener will also receive the +listen for those events being emitted on the blockchain without much +cost. As soon as it is emitted, the listener will also receive the arguments ``from``, ``to`` and ``amount``, which makes it easy to track transactions. In order to listen for this event, you would use :: |