SC CODE: /* DEROMultisig
Multisig concept implementation on DVM-BASIC
by @plrspro
Structure:
There are three main logical units in this contract
wallet, transaction and signer
1. wallet internal account wich hold amount that belongs to this wallet from overall sc balance
2. each wallet contains on one ore more signers
3. any signer can create a transaction from asociated with him internal wallet to DERO address
4. all signers withing the wallet must sign the transaction
5. when last signer signs a transaction it eather sending dero to adress or become invalid if amount is larger the wallet balance
Full detailed discussion: https://forum.dero.io/t/wip-dero-multisig-smart-contract/942
User Flow Example:
1. Create Wallet
2. Add another participants
3. Lock wallet
4. Deposit some funds
5. Create a transaction
6. All wallet participants should sign this transaction
* When last signer succsessfully signs funds will be sent over
*/
/* Service Functions and Utility */
Function Initialize() Uint64
999 RETURN Info("Contract Successfully Deployed")
End Function
Function Info(info_message String) Uint64
01 DIM txid as String
02 LET txid = TXID()
10 PRINTF " +-------------------+ "
20 PRINTF " | `DEROMultisig | "
30 PRINTF " | | "
40 PRINTF " | %s" info_message
50 PRINTF " | | "
60 PRINTF " +-------------------+ "
70 PRINTF " + TXID: %s" txid
80 PRINTF " +-------------------+ "
999 RETURN 0
End Function
Function Error(error_message String) Uint64
01 DIM txid as String
02 LET txid = TXID()
10 PRINTF " +-----[ ERROR ]-----+ "
20 PRINTF " | `DEROMultisig | "
30 PRINTF " | | "
40 PRINTF " | %s" error_message
50 PRINTF " | | "
60 PRINTF " +-----[ ERROR ]-----+ "
70 PRINTF " + TXID: %s" txid
80 PRINTF " +-------------------+ "
999 RETURN 1
End Function
/* `DEROMultisig Wallet` Specific Functions */
// Creates unlocked `DEROMultisig Wallet` instance (txid represents your wallet id inside of a contract scope)
Function WalletCreate() Uint64
01 DIM wallet, creator as String
02 LET wallet = TXID()
03 LET creator = SIGNER()
20 STORE(wallet, creator) // Your `DEROMultisig Wallet` id, where key is txid and value is signer address
21 STORE(wallet+"_locked", 0) // Flag that locks wallet wich allow deposits and disables adding another signers
22 STORE(wallet+"_balance", 0) // Defines a balance of a wallet
23 STORE(wallet+"_signer_index", 0) // First signer list index represents creator
24 STORE(wallet+"_signer_0", creator) //First signer will be executors address
999 RETURN Info("New `DEROMultisig Wallet` ("+wallet+") successfully created.")
End Function
// Add signer to `DEROMultisig Wallet`
Function WalletAddSigner(wallet String, signer String) Uint64
// Check if given DERO address (signer) is valid
10 IF IS_ADDRESS_VALID(signer) == 1 THEN GOTO 20
11 RETURN Error("Given signer address ("+signer+") is not a valid DERO address.")
// Check if given `DEROMultisig Wallet` instance exists in database
20 IF EXISTS(wallet) == 1 THEN GOTO 30
21 RETURN Error("Given `DEROMultisig Wallet` ("+wallet+") instance does not exists in database.")
// Check if contract executor have permission to interact with given `DEROMultisig Wallet` instance
30 IF ADDRESS_RAW(LOAD(wallet)) == ADDRESS_RAW(SIGNER()) THEN GOTO 40
31 RETURN Error("You have no permission to add signers to this `DEROMultisig Wallet` instance.")
// In order to add additional signer `DEROMultisig Wallet` instance should be unlocked
40 IF LOAD(wallet+"_locked") == 0 THEN GOTO 50
41 RETURN Error("You are not able to add additional signer to locked `DEROMultisig Wallet` instance.")
// Prevent adding same signer twice
50 DIM signer_iterator as Uint64
51 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
52 LET signer_iterator = signer_iterator - 1
53 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(signer) THEN GOTO 55
54 RETURN Error("You cannot add the same signer to `DEROMultisig Wallet` instance twice.")
55 IF signer_iterator > 0 THEN GOTO 52
60 PRINTF " --------------------- "
100 DIM next_signer_index as Uint64
101 LET next_signer_index = LOAD(wallet+"_signer_index") + 1
110 STORE(wallet+"_signer_"+next_signer_index, signer)
111 STORE(wallet+"_signer_index", next_signer_index)
999 RETURN Info("New signer ("+signer+") added to `DEROMultisig Wallet` ("+wallet+") successfully.")
End Function
//Locks `DEROMultisig Wallet` preventing new signers to be added to this wallet and allows deposits
Function WalletLock(wallet String) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` instance does not exists in database.")
// Check if contract executor have permission to interact with given `DEROMultisig Wallet` instance
20 IF ADDRESS_RAW(LOAD(wallet)) == ADDRESS_RAW(SIGNER()) THEN GOTO 30
21 RETURN Error("You have no permission to lock this `DEROMultisig Wallet` instance.")
// In order to lock `DEROMultisig Wallet` instance should be unlocked
30 IF LOAD(wallet+"_locked") == 0 THEN GOTO 40
31 RETURN Error("You are not able to lock an already locked `DEROMultisig Wallet` instance.")
40 PRINTF " --------------------- "
100 STORE(wallet+"_locked", 1)
999 RETURN Info("`DEROMultisig Wallet` ("+wallet+") is now locked.")
End Function
//Deposits are only allowed in locked wallets (If wallet is unlocked value will be transfered back)
Function WalletDeposit(wallet String, value Uint64) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` instance does not exists in database.")
// In order to deposit to `DEROMultisig Wallet` instance it should be locked
20 IF LOAD(wallet+"_locked") == 1 THEN GOTO 30
21 RETURN Error("You are not able deposit into unlocked `DEROMultisig Wallet` instance.")
30 PRINTF " --------------------- "
100 DIM new_balance as Uint64
101 LET new_balance = LOAD(wallet+"_balance") + value
102 STORE(wallet+"_balance", new_balance)
999 RETURN Info("`DEROMultisig Wallet` ("+wallet+") succsesfully credited with "+(value/1000000000000)+" DERO. Total equals to "+(new_balance/1000000000000)+" DERO.")
End Function
/* Wallet Creation Aliases */
//Alias to instantly Create, Add 3 Signers and Lock within 1 transaction
Function WalletCreateAndLockWithThreeAdditionalSigners(signer1 String, signer2 String, signer3 String) Uint64
01 DIM wallet as String
02 LET wallet = TXID()
10 IF WalletCreate() == 0 THEN GOTO 20
11 RETURN 1
20 IF WalletAddSigner(wallet, signer1) == 0 THEN GOTO 30
21 RETURN 1
30 IF WalletAddSigner(wallet, signer2) == 0 THEN GOTO 40
31 RETURN 1
40 IF WalletAddSigner(wallet, signer3) == 0 THEN GOTO 50
41 RETURN 1
// 50 IF WalletLock(wallet) == 0 THEN GOTO 60
// 51 RETURN 1
// 60 IF WalletDeposit(wallet, value) == 0 THEN GOTO 70
// 61 RETURN 1
70 PRINTF " --------------------- "
999 RETURN 0
End Function
/* `DEROMultisig Transaction` Specific Functions */
//Creates a `DEROMultisig Transaction` instance ready for signing
Function TransactionCreateSend(wallet String, destination String, amount Uint64) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` does not exists")
// Check if destination wallet is valid DERO address
20 IF IS_ADDRESS_VALID(destination) == 1 THEN GOTO 30
21 RETURN Error("Destiantion address is not a valid DERO address.")
// Check if amount is larger then zero
30 IF amount > 0 THEN GOTO 40
31 RETURN Error("Amount should be greater then zero.")
// Check if amount exist on `DEROMultisig Wallet` balance
40 DIM wallet_balance as Uint64
41 LET wallet_balance = LOAD(wallet+"_balance")
42 IF wallet_balance >= amount THEN GOTO 50 // Thanks @Nelbert442#5433 for this line
43 RETURN Error("The amount of DERO you requested to send ("+(amount/1000000000000)+") exceeding amount in `DEROMultisig Wallet` ("+(wallet_balance/1000000000000)+") instance balance.")
// Check if signer is valid member of a given `DEROMultisig Wallet`, so he can create transactions
50 DIM signer_iterator as Uint64
51 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
52 LET signer_iterator = signer_iterator - 1
53 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(SIGNER()) THEN GOTO 55
54 GOTO 60
55 IF signer_iterator > 0 THEN GOTO 52
56 RETURN Error("You are not a valid member (signer) of this `DEROMultisig Wallet` instance.")
60 PRINTF " --------------------- "
100 DIM transaction as String
101 LET transaction = TXID()
102 STORE("transaction_"+transaction, destination)
103 STORE("transaction_"+transaction+"_amount", amount)
104 STORE("transaction_"+transaction+"_wallet", wallet)
105 STORE("transaction_"+transaction+"_executed", 0) // 0 - transaction open, 1 - transaction successfully executed, 2 - transaction rejected (insuffisient balance)
106 STORE("transaction_"+transaction+"_signatures_count", 0)
//Presign transaction with your signature to save executions
107 TransactionSign(transaction)
999 RETURN Info("`DEROMultisig Transaction` ("+transaction+") succsesfully created.")
End Function
//Alias to `DEROMultisig Transaction`
Function TransactionCreateWithdraw(wallet String, amount Uint64) Uint64
999 RETURN TransactionCreateSend(wallet, SIGNER(), amount)
End Function
//Alias to `DEROMultisig Transaction` with human readable amount eg 4 Dero instead of 4000000000000
Function TransactionCreateSendHumanReadableAmount(wallet String, destination String, amount Uint64) Uint64
// Converting human readable dero amount into blockchain precise
01 LET amount = amount * 1000000000000
999 RETURN TransactionCreateSend(wallet, destination, amount)
End Function
//Alias to `DEROMultisig Transaction` withdraw with human readable amount
Function TransactionCreateWithdrawHumanReadableAmount(wallet String, amount Uint64) Uint64
999 RETURN TransactionCreateSendHumanReadableAmount(wallet, SIGNER(), amount)
End Function
//Signs a `DEROMultisig Transaction` (when last signer will sign this transaction dero will be withdrawn)
Function TransactionSign(transaction String) Uint64
// Check if given `DEROMultisig Transaction` instance exists in database
10 IF EXISTS("transaction_"+transaction) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Transaction` does not exists.")
// Check if `DEROMultisig Transaction` still open
20 IF LOAD("transaction_"+transaction+"_executed") == 0 THEN GOTO 30
21 RETURN Error("Given `DEROMultisig Transaction` is already executed.")
// Check if amount exist on `DEROMultisig Wallet` balance
30 DIM wallet as String
31 LET wallet = LOAD("transaction_"+transaction+"_wallet")
32 DIM wallet_balance as Uint64
33 LET wallet_balance = LOAD(wallet+"_balance")
34 IF wallet_balance - LOAD("transaction_"+transaction+"_amount") >= 0 THEN GOTO 40
35 STORE("transaction_"+transaction+"_executed", 2)
36 RETURN Error("The amount of DERO you requested exceeding amount in `DEROMultisig Wallet` instance bslsnvr, transaction no longer valid.")
// Check if signer is valid member of a given `DEROMultisig Transaction`
40 DIM signer_iterator as Uint64
41 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
42 LET signer_iterator = signer_iterator - 1
43 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(SIGNER()) THEN GOTO 45
44 GOTO 50
45 IF signer_iterator > 0 THEN GOTO 42
46 RETURN Error("You are not a valid signer of this `DEROMultisig Transaction` instance.")
50 IF EXISTS("transaction_"+transaction+"_signer_"+signer_iterator) == 0 THEN GOTO 60
51 RETURN Error("This `DEROMultisig Transaction` is already signed by you.")
60 PRINTF " --------------------- "
// Previous checkup will find signers index and next operation will set a heigh on wich signer confirmed this transaction
100 STORE("transaction_"+transaction+"_signer_"+signer_iterator, BLOCK_HEIGHT()) //First signer will be executors address
// Check if current signer is the last signer of this `DEROMultisig Transaction`, if so execute and close transaction with status 1 (successfully executed)
110 DIM signed_iterator, signed_count as Uint64
111 LET signed_iterator = LOAD(wallet+"_signer_index") + 1
112 LET signed_count = 0
120 LET signed_iterator = signed_iterator - 1
121 IF EXISTS("transaction_"+transaction+"_signer_"+signed_iterator) == 0 THEN GOTO 123
122 LET signed_count = signed_count + 1
123 IF signed_iterator > 0 THEN GOTO 120
124 STORE("transaction_"+transaction+"_signatures_count", signed_count)
125 IF signed_count != LOAD(wallet+"_signer_index")+1 THEN GOTO 999
126 SEND_DERO_TO_ADDRESS(LOAD("transaction_"+transaction), LOAD("transaction_"+transaction+"_amount")-1) // -1 to fix 'Recovered in function uint64 underflow wraparound attack'
127 STORE("transaction_"+transaction+"_executed", 1)
128 STORE(wallet+"_balance", wallet_balance - LOAD("transaction_"+transaction+"_amount"))
998 RETURN Info("`DEROMultisig Transaction` ("+transaction+") signed by last member and now executed.")
999 RETURN Info("`DEROMultisig Transaction` ("+transaction+") signed successfully.")
End Function
|
| SC Arguments: [Name:SC_ACTION Type:uint64 Value:'1' Name:SC_CODE Type:string Value:'/* DEROMultisig
Multisig concept implementation on DVM-BASIC
by @plrspro
Structure:
There are three main logical units in this contract
wallet, transaction and signer
1. wallet internal account wich hold amount that belongs to this wallet from overall sc balance
2. each wallet contains on one ore more signers
3. any signer can create a transaction from asociated with him internal wallet to DERO address
4. all signers withing the wallet must sign the transaction
5. when last signer signs a transaction it eather sending dero to adress or become invalid if amount is larger the wallet balance
Full detailed discussion: https://forum.dero.io/t/wip-dero-multisig-smart-contract/942
User Flow Example:
1. Create Wallet
2. Add another participants
3. Lock wallet
4. Deposit some funds
5. Create a transaction
6. All wallet participants should sign this transaction
* When last signer succsessfully signs funds will be sent over
*/
/* Service Functions and Utility */
Function Initialize() Uint64
999 RETURN Info("Contract Successfully Deployed")
End Function
Function Info(info_message String) Uint64
01 DIM txid as String
02 LET txid = TXID()
10 PRINTF " +-------------------+ "
20 PRINTF " | `DEROMultisig | "
30 PRINTF " | | "
40 PRINTF " | %s" info_message
50 PRINTF " | | "
60 PRINTF " +-------------------+ "
70 PRINTF " + TXID: %s" txid
80 PRINTF " +-------------------+ "
999 RETURN 0
End Function
Function Error(error_message String) Uint64
01 DIM txid as String
02 LET txid = TXID()
10 PRINTF " +-----[ ERROR ]-----+ "
20 PRINTF " | `DEROMultisig | "
30 PRINTF " | | "
40 PRINTF " | %s" error_message
50 PRINTF " | | "
60 PRINTF " +-----[ ERROR ]-----+ "
70 PRINTF " + TXID: %s" txid
80 PRINTF " +-------------------+ "
999 RETURN 1
End Function
/* `DEROMultisig Wallet` Specific Functions */
// Creates unlocked `DEROMultisig Wallet` instance (txid represents your wallet id inside of a contract scope)
Function WalletCreate() Uint64
01 DIM wallet, creator as String
02 LET wallet = TXID()
03 LET creator = SIGNER()
20 STORE(wallet, creator) // Your `DEROMultisig Wallet` id, where key is txid and value is signer address
21 STORE(wallet+"_locked", 0) // Flag that locks wallet wich allow deposits and disables adding another signers
22 STORE(wallet+"_balance", 0) // Defines a balance of a wallet
23 STORE(wallet+"_signer_index", 0) // First signer list index represents creator
24 STORE(wallet+"_signer_0", creator) //First signer will be executors address
999 RETURN Info("New `DEROMultisig Wallet` ("+wallet+") successfully created.")
End Function
// Add signer to `DEROMultisig Wallet`
Function WalletAddSigner(wallet String, signer String) Uint64
// Check if given DERO address (signer) is valid
10 IF IS_ADDRESS_VALID(signer) == 1 THEN GOTO 20
11 RETURN Error("Given signer address ("+signer+") is not a valid DERO address.")
// Check if given `DEROMultisig Wallet` instance exists in database
20 IF EXISTS(wallet) == 1 THEN GOTO 30
21 RETURN Error("Given `DEROMultisig Wallet` ("+wallet+") instance does not exists in database.")
// Check if contract executor have permission to interact with given `DEROMultisig Wallet` instance
30 IF ADDRESS_RAW(LOAD(wallet)) == ADDRESS_RAW(SIGNER()) THEN GOTO 40
31 RETURN Error("You have no permission to add signers to this `DEROMultisig Wallet` instance.")
// In order to add additional signer `DEROMultisig Wallet` instance should be unlocked
40 IF LOAD(wallet+"_locked") == 0 THEN GOTO 50
41 RETURN Error("You are not able to add additional signer to locked `DEROMultisig Wallet` instance.")
// Prevent adding same signer twice
50 DIM signer_iterator as Uint64
51 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
52 LET signer_iterator = signer_iterator - 1
53 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(signer) THEN GOTO 55
54 RETURN Error("You cannot add the same signer to `DEROMultisig Wallet` instance twice.")
55 IF signer_iterator > 0 THEN GOTO 52
60 PRINTF " --------------------- "
100 DIM next_signer_index as Uint64
101 LET next_signer_index = LOAD(wallet+"_signer_index") + 1
110 STORE(wallet+"_signer_"+next_signer_index, signer)
111 STORE(wallet+"_signer_index", next_signer_index)
999 RETURN Info("New signer ("+signer+") added to `DEROMultisig Wallet` ("+wallet+") successfully.")
End Function
//Locks `DEROMultisig Wallet` preventing new signers to be added to this wallet and allows deposits
Function WalletLock(wallet String) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` instance does not exists in database.")
// Check if contract executor have permission to interact with given `DEROMultisig Wallet` instance
20 IF ADDRESS_RAW(LOAD(wallet)) == ADDRESS_RAW(SIGNER()) THEN GOTO 30
21 RETURN Error("You have no permission to lock this `DEROMultisig Wallet` instance.")
// In order to lock `DEROMultisig Wallet` instance should be unlocked
30 IF LOAD(wallet+"_locked") == 0 THEN GOTO 40
31 RETURN Error("You are not able to lock an already locked `DEROMultisig Wallet` instance.")
40 PRINTF " --------------------- "
100 STORE(wallet+"_locked", 1)
999 RETURN Info("`DEROMultisig Wallet` ("+wallet+") is now locked.")
End Function
//Deposits are only allowed in locked wallets (If wallet is unlocked value will be transfered back)
Function WalletDeposit(wallet String, value Uint64) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` instance does not exists in database.")
// In order to deposit to `DEROMultisig Wallet` instance it should be locked
20 IF LOAD(wallet+"_locked") == 1 THEN GOTO 30
21 RETURN Error("You are not able deposit into unlocked `DEROMultisig Wallet` instance.")
30 PRINTF " --------------------- "
100 DIM new_balance as Uint64
101 LET new_balance = LOAD(wallet+"_balance") + value
102 STORE(wallet+"_balance", new_balance)
999 RETURN Info("`DEROMultisig Wallet` ("+wallet+") succsesfully credited with "+(value/1000000000000)+" DERO. Total equals to "+(new_balance/1000000000000)+" DERO.")
End Function
/* Wallet Creation Aliases */
//Alias to instantly Create, Add 3 Signers and Lock within 1 transaction
Function WalletCreateAndLockWithThreeAdditionalSigners(signer1 String, signer2 String, signer3 String) Uint64
01 DIM wallet as String
02 LET wallet = TXID()
10 IF WalletCreate() == 0 THEN GOTO 20
11 RETURN 1
20 IF WalletAddSigner(wallet, signer1) == 0 THEN GOTO 30
21 RETURN 1
30 IF WalletAddSigner(wallet, signer2) == 0 THEN GOTO 40
31 RETURN 1
40 IF WalletAddSigner(wallet, signer3) == 0 THEN GOTO 50
41 RETURN 1
// 50 IF WalletLock(wallet) == 0 THEN GOTO 60
// 51 RETURN 1
// 60 IF WalletDeposit(wallet, value) == 0 THEN GOTO 70
// 61 RETURN 1
70 PRINTF " --------------------- "
999 RETURN 0
End Function
/* `DEROMultisig Transaction` Specific Functions */
//Creates a `DEROMultisig Transaction` instance ready for signing
Function TransactionCreateSend(wallet String, destination String, amount Uint64) Uint64
// Check if given `DEROMultisig Wallet` instance exists in database
10 IF EXISTS(wallet) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Wallet` does not exists")
// Check if destination wallet is valid DERO address
20 IF IS_ADDRESS_VALID(destination) == 1 THEN GOTO 30
21 RETURN Error("Destiantion address is not a valid DERO address.")
// Check if amount is larger then zero
30 IF amount > 0 THEN GOTO 40
31 RETURN Error("Amount should be greater then zero.")
// Check if amount exist on `DEROMultisig Wallet` balance
40 DIM wallet_balance as Uint64
41 LET wallet_balance = LOAD(wallet+"_balance")
42 IF wallet_balance >= amount THEN GOTO 50 // Thanks @Nelbert442#5433 for this line
43 RETURN Error("The amount of DERO you requested to send ("+(amount/1000000000000)+") exceeding amount in `DEROMultisig Wallet` ("+(wallet_balance/1000000000000)+") instance balance.")
// Check if signer is valid member of a given `DEROMultisig Wallet`, so he can create transactions
50 DIM signer_iterator as Uint64
51 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
52 LET signer_iterator = signer_iterator - 1
53 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(SIGNER()) THEN GOTO 55
54 GOTO 60
55 IF signer_iterator > 0 THEN GOTO 52
56 RETURN Error("You are not a valid member (signer) of this `DEROMultisig Wallet` instance.")
60 PRINTF " --------------------- "
100 DIM transaction as String
101 LET transaction = TXID()
102 STORE("transaction_"+transaction, destination)
103 STORE("transaction_"+transaction+"_amount", amount)
104 STORE("transaction_"+transaction+"_wallet", wallet)
105 STORE("transaction_"+transaction+"_executed", 0) // 0 - transaction open, 1 - transaction successfully executed, 2 - transaction rejected (insuffisient balance)
106 STORE("transaction_"+transaction+"_signatures_count", 0)
//Presign transaction with your signature to save executions
107 TransactionSign(transaction)
999 RETURN Info("`DEROMultisig Transaction` ("+transaction+") succsesfully created.")
End Function
//Alias to `DEROMultisig Transaction`
Function TransactionCreateWithdraw(wallet String, amount Uint64) Uint64
999 RETURN TransactionCreateSend(wallet, SIGNER(), amount)
End Function
//Alias to `DEROMultisig Transaction` with human readable amount eg 4 Dero instead of 4000000000000
Function TransactionCreateSendHumanReadableAmount(wallet String, destination String, amount Uint64) Uint64
// Converting human readable dero amount into blockchain precise
01 LET amount = amount * 1000000000000
999 RETURN TransactionCreateSend(wallet, destination, amount)
End Function
//Alias to `DEROMultisig Transaction` withdraw with human readable amount
Function TransactionCreateWithdrawHumanReadableAmount(wallet String, amount Uint64) Uint64
999 RETURN TransactionCreateSendHumanReadableAmount(wallet, SIGNER(), amount)
End Function
//Signs a `DEROMultisig Transaction` (when last signer will sign this transaction dero will be withdrawn)
Function TransactionSign(transaction String) Uint64
// Check if given `DEROMultisig Transaction` instance exists in database
10 IF EXISTS("transaction_"+transaction) == 1 THEN GOTO 20
11 RETURN Error("Given `DEROMultisig Transaction` does not exists.")
// Check if `DEROMultisig Transaction` still open
20 IF LOAD("transaction_"+transaction+"_executed") == 0 THEN GOTO 30
21 RETURN Error("Given `DEROMultisig Transaction` is already executed.")
// Check if amount exist on `DEROMultisig Wallet` balance
30 DIM wallet as String
31 LET wallet = LOAD("transaction_"+transaction+"_wallet")
32 DIM wallet_balance as Uint64
33 LET wallet_balance = LOAD(wallet+"_balance")
34 IF wallet_balance - LOAD("transaction_"+transaction+"_amount") >= 0 THEN GOTO 40
35 STORE("transaction_"+transaction+"_executed", 2)
36 RETURN Error("The amount of DERO you requested exceeding amount in `DEROMultisig Wallet` instance bslsnvr, transaction no longer valid.")
// Check if signer is valid member of a given `DEROMultisig Transaction`
40 DIM signer_iterator as Uint64
41 LET signer_iterator = LOAD(wallet+"_signer_index") + 1
42 LET signer_iterator = signer_iterator - 1
43 IF ADDRESS_RAW(LOAD(wallet+"_signer_"+signer_iterator)) != ADDRESS_RAW(SIGNER()) THEN GOTO 45
44 GOTO 50
45 IF signer_iterator > 0 THEN GOTO 42
46 RETURN Error("You are not a valid signer of this `DEROMultisig Transaction` instance.")
50 IF EXISTS("transaction_"+transaction+"_signer_"+signer_iterator) == 0 THEN GOTO 60
51 RETURN Error("This `DEROMultisig Transaction` is already signed by you.")
60 PRINTF " --------------------- "
// Previous checkup will find signers index and next operation will set a heigh on wich signer confirmed this transaction
100 STORE("transaction_"+transaction+"_signer_"+signer_iterator, BLOCK_HEIGHT()) //First signer will be executors address
// Check if current signer is the last signer of this `DEROMultisig Transaction`, if so execute and close transaction with status 1 (successfully executed)
110 DIM signed_iterator, signed_count as Uint64
111 LET signed_iterator = LOAD(wallet+"_signer_index") + 1
112 LET signed_count = 0
120 LET signed_iterator = signed_iterator - 1
121 IF EXISTS("transaction_"+transaction+"_signer_"+signed_iterator) == 0 THEN GOTO 123
122 LET signed_count = signed_count + 1
123 IF signed_iterator > 0 THEN GOTO 120
124 STORE("transaction_"+transaction+"_signatures_count", signed_count)
125 IF signed_count != LOAD(wallet+"_signer_index")+1 THEN GOTO 999
126 SEND_DERO_TO_ADDRESS(LOAD("transaction_"+transaction), LOAD("transaction_"+transaction+"_amount")-1) // -1 to fix 'Recovered in function uint64 underflow wraparound attack'
127 STORE("transaction_"+transaction+"_executed", 1)
128 STORE(wallet+"_balance", wallet_balance - LOAD("transaction_"+transaction+"_amount"))
998 RETURN Info("`DEROMultisig Transaction` ("+transaction+") signed by last member and now executed.")
999 RETURN Info("`DEROMultisig Transaction` ("+transaction+") signed successfully.")
End Function
'] |
