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Example contracts
wemeetagain
Member Posts: 30 ✭
For me, examples are always very helpful. I feel like I haven't seen that many contract examples...
Lets try to make some basic examples.
I'll start.
A nameserver, where only the sender can edit the data created by that sender:
Lets try to make some basic examples.
I'll start.
A nameserver, where only the sender can edit the data created by that sender:
// input: tx.data[0] = name, tx.data[1] = name data
// stores: key: name, value: [owner address, name data]
// if the fee isn't large enough to run the contract, stop
if tx.value < 100 * block.basefee:
stop
// if the name can overwrite the contract code, stop
if tx.data[0] < 100:
stop
// if name already exists and the sender isn't the name owner, stop
if contract.storage[tx.data[0]]:
if contract.storage[tx.data[0]][0] != tx.sender:
stop
// set name owner and associated data
a = array()
a[0] = tx.sender
a[1] = tx.data[1]
contract.storage[tx.data[0]] = a
Post edited by wemeetagain on
Comments
// input: tx.data[0] = name, tx.data[1] = name data, tx.data[2] = new owner (optional) // stores: key: name, value: [owner address (or new owner), name data] // if the fee isn't large enough to run the contract, stop if tx.value < 100 * block.basefee: stop // if the name can overwrite the contract code, stop if tx.data[0] < 100: stop // if name already exists and the sender isn't the name owner, stop if contract.storage[tx.data[0]]: if contract.storage[tx.data[0]][0] != tx.sender: stop // set name owner and associated data a = array() // if the new owner has been specified, store as owner if tx.data[2] != 0: a[0] = tx.data[2] else: a[0] = tx.sender a[1] = tx.data[1] contract.storage[tx.data[0]] = a