ืืขืื ืึทืืขืืขื!
ะ ืืืจ ืืึธืื ืืขืงืืงื ืืื ืืขืืึทื ืืื ืฆื ืฉืึทืคึฟื ืืื ืึทืจืืขืื ืืื dApp (ืืืกืขื ืืจืึทืืืืื ืึทืคึผืืึทืงืืืฉืึทื) ืืื .
ืืื ืก ืคึผืจืืืืจื ืื ืืืกืึทืกืขืืืึทืื ืืืื ืขืจ ืึท ืืืกื ืืืฆื .
ืืื ืข 3. ืืขืกืืื ื ืื ืืึทืคึผืคึผ ืืฉืืื
ืืืึธืก ืคึผืจืึธืืืขืืก ืืื ืฉืคึผืจืื ืืขื ืืืืก ืืืึท ืืืจ ืืื ืึทืืืก? ืืึทืคึผ ืืงืืื ื?
ืขืจืฉืืขืจ:
Boob ืืื Cooper ืงืขื ืึทืงืกืึทืืขื ืึทืื ืฉืืงื ืืขืื ืฆื ืื dApp ืึทืืจืขืก ืืื ืจืขืืืืขืจ ืึทืจืืืขืจืคืืจื ืืจืึทื ืืึทืงืฉืึทื ื ืืื ืึทืืื ืืืขื ื ืืฉื ืงืขื ืขื ืฆื ืึทืงืกืขืก ืืื ืฆืืจืืง.ืฆืืืืืื ืก:
ืืืจ ืืึทืืจืขื ืขืฆื ื ืืฉื ืึทืืืก ืืื ืงืืื ืืืขื ืคืื ืฆืืจืืงืฆืืขื ืืขืื ืึธื ืื ืืึทืกืงืึธืืข ืคืื โโืืึธื ืืื / ืึธืืขืจ ืงืืคึผืขืจ. ืืื ื, ืืึทืฆืึธืื ืืคืืขืจืงืืึทืืงืืึทื ืฆื ืืึทืฉืืขืืืงื, ืึทืืข ืืจืึทื ืืึทืงืฉืึทื ื ืคืื ืึทืืืก ืืืขื ืืืื ืขืงืกืึทืงืืืืึทื.
ืืื ืก ืคืึทืจืจืืืื 2 ืืืจื ืคืึทืจืืึธื ืึทืืืก ืึทืจืืืขืจืคืืจื ืืจืึทื ืืึทืงืฉืึทื ื. ืืื ืก ืฆืขืืืืงืืขื ืื ืงืขืจืขืงืืึทื ืฉืจืืคื:
๏ฟผ
ืืืจ ืืขื ืขื ืืจืืื ื ืฆื ืฆืืจืืงืฆืืขื ืงืึธืื ืก ืคืื ืืึทืคึผ ืึทืืืก ืืื ืืืจ ืืกืืืข. ืืืจ ืืึทืงืืืขื ืึท ืืขืืช:
ืืึธืืืจ ืคึผืจืืืืจื ืฆื ืฆืืจืืงืฆืืขื ืืืจื ืฆืืจืืงืฆืืขื:
broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"withdraw",args:[{type:"integer", value: 1000000}]}, payment: []}))ืืขืจ ืฉืจืืคื ืึทืจืืขื ืืื ืืืจ ืคืืืืขืจื ืื 2 ืคืื ื!
ืืื ืข 4. ืฉืึทืคึฟื ืึท ืืึทืึธ ืืื ืึธืคึผืฉืืืืื ื
ืฆืื ืืึทืืืืขืจื, ืื RIDE ืฉืคึผืจืึทื ืืื ื ืึธื ื ืืฉื ืื ืคืืืืงืืื ืฆื ืึทืจืืขืื ืืื ืืึทืืืื ืืขื (ืืืขืจืืขืจืืื ืืืงืฉืึทื ืขืจืื, ืืืขืจืืืืขืจื, ืจืขืืืกืขืจ, ืืื"ื ื). ืึธืืขืจ, ืคึฟืึทืจ ืงืืื ืึทืคึผืขืจืืืฉืึทื ื ืืื ืคืืึทื ืืึทืืืื ืืขื ืฉืืืกื-ืืืขืจื ืืืจ ืงืขื ืขื ืคึผืืึทื ืึท ืกืืกืืขื ืคึฟืึทืจ ืืจืืขืื ืืื ืกืืจืื ืืก, ืึทืงืึธืจืืื ืืื ืืื ืฉืืืกืืขื ืืื ืืืืขืจ ืืขืงืจืืคึผืืืึธื.
ืกืืจืื ืืก ืืขื ืขื ืืืืขืจ ืืจืื ื ืฆื ืงืึทื ืงืึทืืึทื ืืื ืกืืจืื ืืก ืงืขื ืขื ืืืื ืืคืืขืฉืืืื ืืืจื ืื ืืขืงืกืื.
ืืื ืก ืงืืืึทืื ืืื ืคึผืึทืจืก ืึท ืฉืืจืืงื ืืื ืึท ืคึผืจืึธืืข ืืืืฉืคึผืื ืืื ืืฉืขืง ืืื ืืึธืก ืึทืคืขืงืฅ ืื ืึทืืืงืึทื ืคืื ืื ืืจืึทื ืกืึทืงืืืึธื.
ืืืจ ืืขืืขืฆื ืืืืฃ ืื ืคืึทืงื ืึทื ืึทืืืก ืงืขื ื ืืฉื ืฆืืืื ืื ืึทืจืืืขืจืคืืจื ืืจืึทื ืกืึทืงืืืึธื, ืืืืึทื ืื ืคืืืืงืืื ืืื ืืคืืขืฉืืขืื ืืื @verifier ืคึฟืึทืจ ืืขื ืืืคึผ ืคืื ืืจืึทื ืกืึทืงืืืึธื.
ืืื ืก ืคืืจ ืืื ืกืืจืื ืืก ืืื ืืขืืึธืื ืืึทืฉืืืกื ืืขื.
ืคืึธืจ ืกืืจืื ืืก
ืื ืืจืึทื ืกืึทืงืืืึธื ืืื ืืขืืืขื ืืืืืขืจ, ืืืจ ืืืืกื ืืื ืฆื ืึทืจืืขืื ืืื ืกืืจืื ืืก.
๏ฟผ
ืืื ืืึทื ืฅ, ืืืจ ืืึธืื ืึทืืฅ ื ืืืืืง ืฆื ืฉืจืืึทืื ืงืึธืืคึผืืขืงืก ืืึธืืืง DAO dApp.
ืืึทืืึท ืืจืึทื ืืึทืงืฉืึทื ื
ืืึทืืึท ืืจืึทื ืืึทืงืฉืึทื ื:
"ืื ืืึทืงืกืืืื ืืจืืืก ืคึฟืึทืจ ืึท ืฉืืืกื ืืื 100 ืืืชืืืช, ืืื ืึท ืฉืืืกื ืงืขื ืขื ืึทื ืืืึทืืื ืึทืจืืืืจืึทืจืืฉ ืืื ืืงืึธื ืงืึธื, ืึทืจืืึทื ืืขืจืขืื ื ืกืคึผืืืกืึทื ืืื ืื ืืขืจืข ื ืื-ืคึผืจืื ืืึทืืึทื ืกืืืืึธืืก. ืฉืืจืืงื ืืืึทืืืขืก ืืึธืื ืึท ืฉืืขืืจ ืคืื 32,768 ืืืืขืก ืืื ืื ืืึทืงืกืืืื ื ืืืขืจ ืคืื ืืขืืืขื ืืืื ืกื ืืื ืืึทืื ืืจืึทื ืกืึทืงืืืึธื ืืื 100. ืงืืืืขืืืืง, ืื ืืึทืงืกืืืื ืืจืืืก ืคืื ืึท ืืึทืื ืืจืึทื ืกืึทืงืืืึธื ืืื ืึทืจืื 140 ืงื - ืคึฟืึทืจ ืืขืจืืึธื ืขื, ืึผืืขื ืคึผืื ืงื ืื ืืขื ื ืคืื ืฉืืืงืกืคึผืืจ ืก ืฉืคึผืื 'ืจืึธืืขืึธ ืืื ืืืฉืืืืขื. '.
ืืืจ ืืึทืื ืึท DAO ืืื ืื ืคืืืืขื ืืข ืื ืึธืื:
ืืื ืกืืจ ืคึฟืึทืจ ืึท ืกืืึทืจืืึทืคึผ ืฆื ืืึทืงืืืขื ืคืึทื ืืื ื ืืืจื ืจืืคื getFunds() ืื ืฉืืืฆื ืคืื ืืืึท ืืื ืืกืืขืจ 2 ืคึผืึทืจืืืกืึทืคึผืึทื ืฅ - ืืึทืึธ ืื ืืืขืกืืขืจื - ืืื ืคืืจืืื ืื. ืฆืืจืืงืฆืืขื ืขืก ืืืขื ืืืื ืืขืืืขื ืคึผืื ืงื ืืื ืคืื ืืื ืื ืืึทื ืฅ ืื ืืขืืืืื ืืืืฃ ืึธืคึผืฉืืืืื ื ืืึทืึธ ืึธืื ืขืจื.
ืืึธืืืจ ืืึทืื 3 ืืืืคึผืก ืคืื ืฉืืืกืืขื ืืื ืืืืื ืืึธืืืง ืคึฟืึทืจ ืืจืืขืื ืืื ืืึทืืึทื ืกืขืก ืืื 2 ื ืืึท ืคืึทื ืืงืฉืึทื ื ืฉืืืืขื ืืื ืืขืคืึทื ืื:
ืงืงืกื ืืืงืกโฆืงืกื ืืืงืก_ืืื ื = ืื ืืืขืกืืขืจื, ืื ืืืฆื ืืืึธื (ืฉืืืืขื, ืึทืืืขืงืืืืื, ืืืืืืจืึธืึทื)
ืงืงืกื ืืืงืกโฆืงืกื ืืืงืก_sv = ืกืืึทืจืืึทืคึผืก, ื ืืืขืจ ืคืื ืืืึธืืฅ (ืฉืืืืขื, getFunds)
ืงืงืกื ืืืงืกโฆืงืกื ืืืงืก_sf = ืกืืึทืจืืึทืคึผืก, ื ืืืขืจ ืคืื ืืืึธืืฅ (ืฉืืืืขื, getFunds)
xxโฆxx = ืขืคื ืืืขื ืึทืืจืขืก (35 ืืืชืืืช)
ืืืืข ืืึธื ืึทื ืืื ืฉืืืืขื ืืืจ ืืึทืจืคึฟื ืฆื ืืขืจืืืึทื ืืืงื ืขืืืขืืข ืคืขืืืขืจ ืืื ืึทืืึธื:
WriteSet([DataEntry(key1, value1), DataEntry(key2, value2)]),WriteSet ืึทืืึทืื ืืื ืื ืฆื ืืึทืื ืขืืืขืืข ืจืขืงืึธืจืืก ืืื ืืืื ืื ืืืึธืืงืขืกืงืจืืคึผื ืืจืึทื ืืึทืงืฉืึทื ื.
ืืึธืก ืืื ืืื ืขืก ืงืืงื ืืื ืืื ืื ืฉืืืกื-ืืืขืจื ืกืืึธืจืืืืฉ ืคืื ืื DAO dApp, ื ืึธื ืืึธื ืืื ืงืืคึผืขืจ ืจืืคึผืืขื ืืฉื ia- ืึทืืืขืงืืืืื:
ืืื ืืืขืจ ืึทืืืขืงืืืืื ืคืื ืงืฆืืข ืืื ืืขืืืื ืึท ืืืกื:
ืืืฆื ืงืืื ืื ืืขืจืกื ืืืืืืืง ืืึธืืขื ื ืืื ืื ืึทืงืืืืืืืขืื ืคืื ืื DAO - ืฉืืืืขื ืคึฟืึทืจ ืคึผืจืึทืืืฉืขืงืก ืฆื ืืืื ืคืื ืึทื ืกื.
ืืึธื ืฉืืืืขื ืคึฟืึทืจ Neli ืก 500000 ืืืึทืืืึทืืขืฅ ืคึผืจืืืขืงื:
broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"vote",args:[{type:"integer", value: 500000}, {type:"string", value: "3MrXEKJr9nDLNyVZ1d12Mq4jjeUYwxNjMsH"}]}, payment: []}))
ืืื ืื ืืึทืื ืงืจืึธื ืืืจ ืืขื ืึทืืข ืื ื ืืืืืง ืืืื ืกื ืคึฟืึทืจ Neli ืก ืึทืืจืขืก:
ืงืืคืขืจ ืืื ืืืื ืืขืฉืืืื ืคืืจ ืืขื ื ืขืื ืคืจืืืขืงื.
ืืื ืก ื ืขืืขื ืึท ืงืืง ืืื ืื ืคึฟืื ืงืฆืืข ืงืึธื getFunds. ื ืขืื ืืืื ืงืืืึทืื ืึท ืืื ืืืื ืคืื 2 ืืืึธืืฅ ืฆื ืงืขื ืขื ืฆื ืฆืืจืืงืฆืืขื ืืขืื ืคืื ืื DAO.
ื ืขืื ืืืขื ืฆืืจืืงืฆืืขื ืืึทืื ืคืื ืืขืจ ืกืืืข ืืืึธืก ืืืจ ืืึธื ืขื ืืจืึทืกืืื:
broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"getFunds",args:[{type:"integer", value: 500000}]}, payment: []}))
ืื ืืื ืืขืจืึธืื, ืืึธืก ืืื, ืืึทืึธ ืึทืจืืขื!
ืืืจ ืืึธืื ืืขืงืืงื ืืืืฃ ืืขื ืคึผืจืึธืฆืขืก ืคืื ืงืจืืืืืื ื ืึท DAO ืืื ืืขืจ ืฉืคึผืจืึทื RIDE4DAPPS.
ืืื ืื ืคืืืืขื ืืข ืคึผืึทืจืฅ ืืืจ ืืืขืื ื ืขืืขื ืึท ื ืขืขื ืืขืจ ืงืืง ืืื ืงืึธื ืจืขืคืึทืงืืึธืจืื ื ืืื ืคืึทื ืืขืกืืื ื.
ืืึทื ืฅ ืืืขืจืกืืข ืคืื โโืื ืงืึธื ืืื
# In this example multiple accounts can deposit their funds to DAO and safely take them back, no one can interfere with this.
# DAO participants can also vote for particular addresses and let them withdraw invested funds then quorum has reached.
# An inner state is maintained as mapping `address=>waves`.
# https://medium.com/waves-lab/waves-announces-funding-for-ride-for-dapps-developers-f724095fdbe1
# You can try this contract by following commands in the IDE (ide.wavesplatform.com)
# Run commands as listed below
# From account #0:
# deploy()
# From account #1: deposit funds
# broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"deposit",args:[]}, payment: [{amount: 100000000, asset:null }]}))
# From account #2: deposit funds
# broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"deposit",args:[]}, payment: [{amount: 100000000, asset:null }]}))
# From account #1: vote for startup
# broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"vote",args:[{type:"integer", value: 500000}, {type:"string", value: "3MrXEKJr9nDLNyVZ1d12Mq4jjeUYwxNjMsH"}]}, payment: []}))
# From account #2: vote for startup
# broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"vote",args:[{type:"integer", value: 500000}, {type:"string", value: "3MrXEKJr9nDLNyVZ1d12Mq4jjeUYwxNjMsH"}]}, payment: []}))
# From account #3: get invested funds
# broadcast(invokeScript({dappAddress: address(env.accounts[1]), call:{function:"getFunds",args:[{type:"integer", value: 500000}]}, payment: []}))
{-# STDLIB_VERSION 3 #-}
{-# CONTENT_TYPE DAPP #-}
{-# SCRIPT_TYPE ACCOUNT #-}
@Callable(i)
func deposit() = {
let pmt = extract(i.payment)
if (isDefined(pmt.assetId)) then throw("can hodl waves only at the moment")
else {
let currentKey = toBase58String(i.caller.bytes)
let xxxInvestorBalance = currentKey + "_" + "ib"
let currentAmount = match getInteger(this, xxxInvestorBalance) {
case a:Int => a
case _ => 0
}
let newAmount = currentAmount + pmt.amount
WriteSet([DataEntry(xxxInvestorBalance, newAmount)])
}
}
@Callable(i)
func withdraw(amount: Int) = {
let currentKey = toBase58String(i.caller.bytes)
let xxxInvestorBalance = currentKey + "_" + "ib"
let currentAmount = match getInteger(this, xxxInvestorBalance) {
case a:Int => a
case _ => 0
}
let newAmount = currentAmount - amount
if (amount < 0)
then throw("Can't withdraw negative amount")
else if (newAmount < 0)
then throw("Not enough balance")
else ScriptResult(
WriteSet([DataEntry(xxxInvestorBalance, newAmount)]),
TransferSet([ScriptTransfer(i.caller, amount, unit)])
)
}
@Callable(i)
func getFunds(amount: Int) = {
let quorum = 2
let currentKey = toBase58String(i.caller.bytes)
let xxxStartupFund = currentKey + "_" + "sf"
let xxxStartupVotes = currentKey + "_" + "sv"
let currentAmount = match getInteger(this, xxxStartupFund) {
case a:Int => a
case _ => 0
}
let totalVotes = match getInteger(this, xxxStartupVotes) {
case a:Int => a
case _ => 0
}
let newAmount = currentAmount - amount
if (amount < 0)
then throw("Can't withdraw negative amount")
else if (newAmount < 0)
then throw("Not enough balance")
else if (totalVotes < quorum)
then throw("Not enough votes. At least 2 votes required!")
else ScriptResult(
WriteSet([
DataEntry(xxxStartupFund, newAmount)
]),
TransferSet([ScriptTransfer(i.caller, amount, unit)])
)
}
@Callable(i)
func vote(amount: Int, address: String) = {
let currentKey = toBase58String(i.caller.bytes)
let xxxInvestorBalance = currentKey + "_" + "ib"
let xxxStartupFund = address + "_" + "sf"
let xxxStartupVotes = address + "_" + "sv"
let currentAmount = match getInteger(this, xxxInvestorBalance) {
case a:Int => a
case _ => 0
}
let currentVotes = match getInteger(this, xxxStartupVotes) {
case a:Int => a
case _ => 0
}
let currentFund = match getInteger(this, xxxStartupFund) {
case a:Int => a
case _ => 0
}
if (amount <= 0)
then throw("Can't withdraw negative amount")
else if (amount > currentAmount)
then throw("Not enough balance")
else ScriptResult(
WriteSet([
DataEntry(xxxInvestorBalance, currentAmount - amount),
DataEntry(xxxStartupVotes, currentVotes + 1),
DataEntry(xxxStartupFund, currentFund + amount)
]),
TransferSet([ScriptTransfer(i.caller, amount, unit)])
)
}
@Verifier(tx)
func verify() = {
match tx {
case t: TransferTransaction =>false
case _ => true
}
}
ืืงืืจ: www.habr.com
