Introduction

See the FA1.2 Quick Start Tutorial for more detail.

You can find the following example on carthagenet here.

Introduction

Contracts

This repo defines two contracts:

A compile-time polymorphic vesting contract, which accepts a token transfer method and implements a vesting schedule for it
A Tez vesting contract, which allows a single admin, set at origination, to delegate its balance.

The following examples use the Tez vesting contract.

Specification

A vesting contract holds some tokens and periodically allows some of its tokens to be transferred to a fixed address, i.e. "flushed":

parameter (or (option %setDelegate key_hash)
              (nat %vest))

We call one period of waiting a tick, i.e. a fixed number of tokens are added to the allowed number every tick.

The number of tokens that may be transferred over time is specified by a "vesting schedule", which includes:

timestamp: when the vesting should begin
nat: the number of seconds per tick
nat: the number of mutez that are allowed per tick

Example

Suppose we originate the contract with 60 Mutez and then set:

timestamp := now
seconds_per_tick := 60
mutez_per_tick := 1

Then we can have the following scenarios:

One minute after origination, anyone may trigger the flush of 1 Mutez.
If no one flushes the contract after origination, 10 minutes later, anyone may trigger the flush of up to 10 Mutez.
If the maximum number is flushed 5 minutes after origination (5 Mutez), anyone may flush up to 10 Mutez 10 minutes later
One hour after origination, the entire balance of the contract may be flushed.

Setting Up

Requirements

Tezos-client

To set up the tezos-client, follow the instructions in the Setup Tezos Client tutorial

Installing Dependencies

stack build

Note that this will take some time.

Originating

Print the `vestingTezContract`

Required Haskell imports:

import qualified Lorentz.Contracts.Vesting
import Tezos.Crypto.Orphans ()
import Text.Read

(Re)generate the contract:

printVestingTezContract (Just "contracts/vesting_tez.tz") False

Generate the initial storage

❯❯❯ echo $ALICE_ADDRESS
tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr

❯❯❯ echo $BOB_ADDRESS
tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm

The invocation is:

printInitVestingTezContract
  targetAddress
  delegateAdminAddress
  secondPerTick
  mutezPerTick

For example:

printInitVestingTezContract (read "tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr") (read "tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm") 30 1

Pair (Pair "tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr" "tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm") (Pair 0 (Pair "2020-09-10T18:57:56Z" (Pair 30 1)))

This will allow 1 Mutez to be flushed every 30 seconds, which is the block time for carthagenet.

Originate the contract

ooa1EPyaoe6Gm8WEzfuRJSqH6VkhWxwPP3HyfH98GZQS5Ej8QpQ

$ tezos-client --wait none originate contract VestingTez \
  transferring 0 from $BOB_ADDRESS running \
  "$(cat contracts/vesting_tez.tz | tr -d '\n')" \
  --init 'Pair (Pair "tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr" "tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm") (Pair 0 (Pair "2020-09-10T18:57:56Z" (Pair 30 1)))' \
  --burn-cap 0.753

Waiting for the node to be bootstrapped before injection...
Current head: BKr17Pt8XfgL (timestamp: 2020-09-10T19:01:14-00:00, validation: 2020-09-10T19:01:32-00:00)
Node is bootstrapped, ready for injecting operations.
Estimated gas: 23273 units (will add 100 for safety)
Estimated storage: 753 bytes added (will add 20 for safety)
Operation successfully injected in the node.
Operation hash is 'ooa1EPyaoe6Gm8WEzfuRJSqH6VkhWxwPP3HyfH98GZQS5Ej8QpQ'
NOT waiting for the operation to be included.
Use command
  tezos-client wait for ooa1EPyaoe6Gm8WEzfuRJSqH6VkhWxwPP3HyfH98GZQS5Ej8QpQ to be included --confirmations 30 --branch BKr17Pt8XfgLJmixB51xsjtR6mgWc4Z5PC2sgumtVNGzMqwpzZ6
and/or an external block explorer to make sure that it has been included.
This sequence of operations was run:
  Manager signed operations:
    From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
    Fee to the baker: ꜩ0.003111
    Expected counter: 624017
    Gas limit: 23373
    Storage limit: 773 bytes
    Balance updates:
      tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ............. -ꜩ0.003111
      fees(tz1Ke2h7sDdakHJQh8WX4Z372du1KChsksyU,348) ... +ꜩ0.003111
    Origination:
      From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
      Credit: ꜩ0
      Script:
        { parameter (or (option %setDelegate key_hash) (nat %vest)) ;
          storage (pair (pair address address) (pair nat (pair timestamp (pair nat nat)))) ;
          code { DUP ;
                 CAR ;
                 DIP { CDR } ;
                 IF_LEFT
                   { SWAP ;
                     DUP ;
                     DIP { CAR ;
                           CDR ;
                           SENDER ;
                           COMPARE ;
                           EQ ;
                           IF { DIP { NIL operation } ; SET_DELEGATE ; CONS } { FAILWITH } } ;
                     SWAP ;
                     PAIR }
                   { PAIR ;
                     DUP ;
                     CAR ;
                     DIP { CDR ;
                           DUP ;
                           DIP { CAR } ;
                           CDR ;
                           DUP ;
                           DIP { CDR } ;
                           DUP ;
                           CDR ;
                           DIP { CAR } } ;
                     DUP ;
                     DIP { DIP { DIP { DUP } ;
                                 DUP ;
                                 CAR ;
                                 NOW ;
                                 SUB ;
                                 DIP { CDR ; CAR } ;
                                 EDIV ;
                                 IF_NONE { FAILWITH } { CAR } ;
                                 SUB ;
                                 ISNAT } ;
                           SWAP ;
                           IF_NONE
                             { FAILWITH }
                             { DIP { DUP } ; SWAP ; COMPARE ; LE ; IF { ADD } { FAILWITH } } ;
                           DIP { DUP } ;
                           SWAP ;
                           DIP { PAIR ; SWAP ; DUP } } ;
                     DIP { CDR ; CDR } ;
                     MUL ;
                     SWAP ;
                     CAR ;
                     CONTRACT unit ;
                     IF_NONE
                       { FAILWITH }
                       { SWAP ;
                         PUSH mutez 1 ;
                         MUL ;
                         UNIT ;
                         TRANSFER_TOKENS ;
                         DIP { NIL operation } ;
                         CONS } ;
                     DIP { PAIR } ;
                     PAIR } } }
        Initial storage:
          (Pair (Pair "tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr" "tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm")
                (Pair 0 (Pair "2020-09-10T18:57:56Z" (Pair 30 1))))
        No delegate for this contract
        This origination was successfully applied
        Originated contracts:
          KT1PvGfa453DkooTHtBumpU9avi2N4Lp1sMH
        Storage size: 496 bytes
        Paid storage size diff: 496 bytes
        Consumed gas: 23273
        Balance updates:
          tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ... -ꜩ0.496
          tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ... -ꜩ0.257

New contract KT1PvGfa453DkooTHtBumpU9avi2N4Lp1sMH originated.
Contract memorized as VestingTez.

To actually use it for vesting, we'll need to transfer some tez to the contract:

onyohn6fJBhqjgjp85iZbMiJFA9HttDxN2YWCcGqHFbtNuRDg8K

$ tezos-client --wait none originate contract VestingTez \
  transferring 10000 from $BOB_ADDRESS running \
  "$(cat contracts/vesting_tez.tz | tr -d '\n')" \
  --init 'Pair (Pair \"$ALICE_ADDRESS\" \"$BOB_ADDRESS\") (Pair 0 (Pair "2020-09-10T18:57:56Z" (Pair 30 1)))' \
  --burn-cap 0.753

Waiting for the node to be bootstrapped before injection...
Current head: BL8n2wxxshUz (timestamp: 2020-09-10T19:03:44-00:00, validation: 2020-09-10T19:04:14-00:00)
Node is bootstrapped, ready for injecting operations.
Estimated gas: 23273 units (will add 100 for safety)
Estimated storage: 753 bytes added (will add 20 for safety)
Operation successfully injected in the node.
Operation hash is 'oniaFn6W7aaMcT7p56dN3N2ve24fr2S9iSdpoQShxdFL98dhq9E'
NOT waiting for the operation to be included.
Use command
  tezos-client wait for oniaFn6W7aaMcT7p56dN3N2ve24fr2S9iSdpoQShxdFL98dhq9E to be included --confirmations 30 --branch BKra754C6iopunJKDJNfqCmqvpPCNz7TD4eFk2ACZhXaNNoPxcf
and/or an external block explorer to make sure that it has been included.
This sequence of operations was run:
  Manager signed operations:
    From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
    Fee to the baker: ꜩ0.003115
    Expected counter: 624018
    Gas limit: 23373
    Storage limit: 773 bytes
    Balance updates:
      tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ............. -ꜩ0.003115
      fees(tz1Ke2h7sDdakHJQh8WX4Z372du1KChsksyU,348) ... +ꜩ0.003115
    Origination:
      From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
      Credit: ꜩ10000
      Script:
        { ... }
        Initial storage:
          (Pair (Pair "tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr" "tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm")
                (Pair 0 (Pair "2020-09-10T18:57:56Z" (Pair 30 1))))
        No delegate for this contract
        This origination was successfully applied
        Originated contracts:
          KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a
        Storage size: 496 bytes
        Paid storage size diff: 496 bytes
        Consumed gas: 23273
        Balance updates:
          tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ... -ꜩ0.496
          tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ... -ꜩ0.257
          tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ... -ꜩ10000
          KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a ... +ꜩ10000

New contract KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a originated.
Contract memorized as VestingTez.

Make a bash variable for the contract:

VESTING_TEZ="KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a"

To vest some tez, submit the number of ticks to the vest entrypoint.

Submitting too many ticks will error:

$ tezos-client --wait none transfer 0 from $BOB_ADDRESS to $VESTING_TEZ \
  --entrypoint vest --arg 100

Waiting for the node to be bootstrapped before injection...
Current head: BKoDiFqSKwRZ (timestamp: 2020-09-10T19:08:24-00:00, validation: 2020-09-10T19:08:27-00:00)
Node is bootstrapped, ready for injecting operations.
This simulation failed:
  Manager signed operations:
    From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
    Fee to the baker: ꜩ0
    Expected counter: 624019
    Gas limit: 1040000
    Storage limit: 60000 bytes
    Transaction:
      Amount: ꜩ0
      From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
      To: KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a
      Entrypoint: vest
      Parameter: 100
      This operation FAILED.

Runtime error in contract KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a:
  01: { parameter (or (option %setDelegate key_hash) (nat %vest)) ;
  02:   storage (pair (pair address address) (pair nat (pair timestamp (pair nat nat)))) ;
  03:   code { DUP ;
  04:          CAR ;
  05:          DIP { CDR } ;
  06:          IF_LEFT
  07:            { SWAP ;
  08:              DUP ;
  09:              DIP { CAR ;
  10:                    CDR ;
  11:                    SENDER ;
  12:                    COMPARE ;
  13:                    EQ ;
  14:                    IF { DIP { NIL operation } ; SET_DELEGATE ; CONS } { FAILWITH } } ;
  15:              SWAP ;
  16:              PAIR }
  17:            { PAIR ;
  18:              DUP ;
  19:              CAR ;
  20:              DIP { CDR ;
  21:                    DUP ;
  22:                    DIP { CAR } ;
  23:                    CDR ;
  24:                    DUP ;
  25:                    DIP { CDR } ;
  26:                    DUP ;
  27:                    CDR ;
  28:                    DIP { CAR } } ;
  29:              DUP ;
  30:              DIP { DIP { DIP { DUP } ;
  31:                          DUP ;
  32:                          CAR ;
  33:                          NOW ;
  34:                          SUB ;
  35:                          DIP { CDR ; CAR } ;
  36:                          EDIV ;
  37:                          IF_NONE { FAILWITH } { CAR } ;
  38:                          SUB ;
  39:                          ISNAT } ;
  40:                    SWAP ;
  41:                    IF_NONE
  42:                      { FAILWITH }
  43:                      { DIP { DUP } ; SWAP ; COMPARE ; LE ; IF { ADD } { FAILWITH } } ;
  44:                    DIP { DUP } ;
  45:                    SWAP ;
  46:                    DIP { PAIR ; SWAP ; DUP } } ;
  47:              DIP { CDR ; CDR } ;
  48:              MUL ;
  49:              SWAP ;
  50:              CAR ;
  51:              CONTRACT unit ;
  52:              IF_NONE
  53:                { FAILWITH }
  54:                { SWAP ;
  55:                  PUSH mutez 1 ;
  56:                  MUL ;
  57:                  UNIT ;
  58:                  TRANSFER_TOKENS ;
  59:                  DIP { NIL operation } ;
  60:                  CONS } ;
  61:              DIP { PAIR } ;
  62:              PAIR } } }
At line 43 characters 72 to 80,
script reached FAILWITH instruction
with 100
Fatal error:
  transfer simulation failed

But it will succeed for a valid number of ticks:

onyohn6fJBhqjgjp85iZbMiJFA9HttDxN2YWCcGqHFbtNuRDg8K

$ tezos-client --wait none transfer 0 from $BOB_ADDRESS to $VESTING_TEZ \
  --entrypoint vest --arg 3

Waiting for the node to be bootstrapped before injection...
Current head: BLuzPvDHnWyW (timestamp: 2020-09-10T19:09:24-00:00, validation: 2020-09-10T19:09:44-00:00)
Node is bootstrapped, ready for injecting operations.
Estimated gas: 42846 units (will add 100 for safety)
Estimated storage: no bytes added
Operation successfully injected in the node.
Operation hash is 'onyohn6fJBhqjgjp85iZbMiJFA9HttDxN2YWCcGqHFbtNuRDg8K'
NOT waiting for the operation to be included.
Use command
  tezos-client wait for onyohn6fJBhqjgjp85iZbMiJFA9HttDxN2YWCcGqHFbtNuRDg8K to be included --confirmations 30 --branch BLuzPvDHnWyWtSGztZXdWnZcXrfnyE5hQUG6bQeukXTRVGpc7H5
and/or an external block explorer to make sure that it has been included.
This sequence of operations was run:
  Manager signed operations:
    From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
    Fee to the baker: ꜩ0.004558
    Expected counter: 624019
    Gas limit: 42946
    Storage limit: 0 bytes
    Balance updates:
      tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm ............. -ꜩ0.004558
      fees(tz1Ke2h7sDdakHJQh8WX4Z372du1KChsksyU,348) ... +ꜩ0.004558
    Transaction:
      Amount: ꜩ0
      From: tz1bDCu64RmcpWahdn9bWrDMi6cu7mXZynHm
      To: KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a
      Entrypoint: vest
      Parameter: 3
      This transaction was successfully applied
      Updated storage:
        (Pair (Pair 0x00003b5d4596c032347b72fb51f688c45200d0cb50db
                    0x0000aad02222472cdf9892a3011c01caf6407f027081)
              (Pair 3 (Pair 1599764276 (Pair 30 1))))
      Storage size: 496 bytes
      Consumed gas: 32639
    Internal operations:
      Transaction:
        Amount: ꜩ0.000003
        From: KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a
        To: tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr
        This transaction was successfully applied
        Consumed gas: 10207
        Balance updates:
          KT1Gkixg9sDd3LE5Rn1RqkiQnAk2xnFVuq7a ... -ꜩ0.000003
          tz1R3vJ5TV8Y5pVj8dicBR23Zv8JArusDkYr ... +ꜩ0.000003

Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
app		app
contracts		contracts
hpack		hpack
ligo		ligo
src		src
test		test
.gitignore		.gitignore
LICENSE		LICENSE
README.md		README.md
README_DELPHI.md		README_DELPHI.md
Setup.hs		Setup.hs
package.yaml		package.yaml
shell.nix		shell.nix
stack.yaml		stack.yaml
stack.yaml.lock		stack.yaml.lock

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