Vesting Smart Contract

This is an implementation of a vesting smart contract for Casperlabs including a vesting smart contract separated into the smart contract and logic layers.

Testing in an Online IDE

You can follow the above link to open this project in an online IDE, to build/test the contract.

Available methods

• Deploy
• Pause
• Unpause
• Admin Release
• Withdraw

After deployment, an additional smart contract is saved under the vesting_proxy key. Pause, Unpause, Admin Release and Withdraw methods have to call this contract and specify the vesting contract hash as a first argument.

Deploy

When deploying, the following parameters have to be specified in the given order.

Parameters

Name	Type	Description
method	string	Has to be deploy.
contract_name	string	Name of the key the contract is save under.
admin	bytes	Account base16 address, that will act as an administrator. Admin can pause, unpause the contract and release remaining amount when conditions are met.
recipient	bytes	Account base16 address, that is eligible to withdraw the funds from the contract when conditions are met.
cliff_timestamp	U512	At this time, recipient is eligible to withdraw the cliff_amount from the contract.
cliff_amount	U512	The amount the recipient can withdraw after at cliff_timestamp time.
drip_duration	U512	After the cliff_timestamp is reached, evertime this period of time elapses, recipient is eligible to withdraw addtional drip_amount from the contract.
drip_amount	U512	The additiona amount the recipient can withdraw after every drip_duration period.
total_amount	U512	Total amount of CLX tokens locked in the smart contract at the deploy.
admin_release_duration	U512	The time on pause, that has to elapse for the Admin to be able to withdraw all of the remainig balance from the contract.

Pause

Pausing stops the internal contract's clock. Only the Admin can pause the contract.

Parameters

Name	Type	Description
vesting_contract_address	bytes	Address of the vesting contract.
method	string	Has to be 'pause'.

Unpause

Unpausing resumes the internal contract's clock. Only the Admin can unpause the contract.

Parameters

Name	Type	Description
vesting_contract_address	bytes	Address of the vesting contract.
method	string	Has to be 'unpause'.

Admin Release

Parameters

If the contract was paused without unpausing an admin_release_duration ago, then the Admin can call this method to withdraw all CLX tokens from the account to the Admin's main purse.

Name	Type	Description
vesting_contract_address	bytes	Address of the vesting contract.
method	string	Has to be 'admin_release_proxy'.

Withdraw

Parameters

The Recipient account can withdraw the available CLX amount from the smart contract. This is transferred to the main purse of the recipient.

Name	Type	Description
vesting_contract_address	bytes	Address of the vesting contract.
method	string	Has to be 'withdraw_release'.
amount	U512	The amount to withdraw from the contract.

Error codes

Code	Message
65537	UnknownApiCommand
65538	UnknownDeployCommand
65539	UnknownProxyCommand
65540	UnknownConstructorCommand
65541	UnknownVestingCallCommand
65542	AlreadyPaused
65543	AlreadyUnpaused
65544	NotTheAdminAccount
65545	NotTheRecipientAccount
65546	UnexpectedVestingError
65547	NotEnoughBalance
65548	PurseTransferError
65549	PurseBalanceCheckError
65550	NotPaused
65551	NothingToWithdraw
65552	NotEnoughTimeElapsed
65553	LocalPurseKeyMissing
65554	UnexpectedType
65555	MissingKey
65556	MissingArgument0
65557	MissingArgument1
65558	MissingArgument2
65559	MissingArgument3
65560	MissingArgument4
65561	MissingArgument5
65562	MissingArgument6
65563	MissingArgument7
65564	MissingArgument8
65565	MissingArgument9
65566	InvalidArgument0
65567	InvalidArgument1
65568	InvalidArgument2
65569	InvalidArgument3
65570	InvalidArgument4
65571	InvalidArgument5
65572	InvalidArgument6
65573	InvalidArgument7
65574	InvalidArgument8
65575	InvalidArgument9
65576	UnsupportedNumberOfArguments

Example of deploy

CLIFF_TIMESTAMP=1583024523 # 2020/03/01 @ 1:02am (UTC)
CLIFF_AMOUNT=100
DRIP_DURATION=86400 # 1 day
DRIP_AMOUNT=20
TOTAL_AMOUNT=500
ADMIN_RELEASE_DURATION=432000 # 5 days

ARGS='[
    {"name": "method", "value": {"string_value": "deploy"}}, 
    {"name": "contract_name", "value": {"string_value": "vault_01"}}, 
    {"name": "admin", "value": {"bytes_value": "'$ADMIN_PUB'"}}, 
    {"name": "recipient", "value": {"bytes_value": "'$RECIPIENT_PUB'"}}, 
    {"name": "cliff_timestamp", "value": {"big_int": {"value": "'$CLIFF_TIMESTAMP'", "bit_width": 512}}}, 
    {"name": "cliff_amount", "value": {"big_int": {"value": "'$CLIFF_AMOUNT'", "bit_width": 512}}}, 
    {"name": "drip_timestamp", "value": {"big_int": {"value": "'$DRIP_DURATION'", "bit_width": 512}}}, 
    {"name": "drip_duration", "value": {"big_int": {"value": "'$DRIP_AMOUNT'", "bit_width": 512}}}, 
    {"name": "total_amount", "value": {"big_int": {"value": "'$TOTAL_AMOUNT'", "bit_width": 512}}}, 
    {"name": "admin_relase_duration", "value": {"big_int": {"value": "'$ADMIN_RELEASE_DURATION'", "bit_width": 512}}} 
]'

casperlabs_client --host deploy.casperlabs.io deploy \
    --private-key $SENDER_PRIVATE_KEY \
    --payment-amount 10000000 \
    --session $VESTING_WASM \
    --session-args "$ARGS"

Testing in an Online IDE

You can follow the above link to open this project in an online IDE, to build/test the contract.