ALL CHANGES

.env.example

@@ -0,0 +1,3 @@
+RPC_URL=http://127.0.0.1:5050
+ADDRESS=0x000000000000000000000000000000000000000000000000000000000000000
+PRIVATE_KEY=0x000000000000000000000000000000000000000000000000000000000000000

.eslintrc.json

@@ -0,0 +1,12 @@
+{
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "extends": ["plugin:@typescript-eslint/recommended"],
+  "env": {
+    "node": true
+  },
+  "ignorePatterns": ["dist", "cairo"]
+}

.github/workflows/cairo-ci.yml

@@ -0,0 +1,26 @@
+name: Cairo CI
+
+on: push
+
+jobs:
+  tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Step 1 - Check out main branch
+        uses: actions/checkout@v3
+      - name: Step 2 - Getting scarb
+        uses: software-mansion/[email protected]
+      - name: Step 3 - Setting up snfoundry
+        uses: foundry-rs/setup-snfoundry@v3
+      - name: Step 4 - Running tests
+        run: scarb test
+
+  format:
+    runs-on:  ubuntu-latest
+    steps:
+      - name: Step 1 - Check out main branch
+        uses: actions/checkout@v3
+      - name: Step 2 - Getting scarb
+        uses: software-mansion/[email protected]
+      - name: Step 3 - Checking format
+        run: scarb fmt --check

.github/workflows/integration-ci.yml

@@ -0,0 +1,46 @@
+name: Integration CI
+
+on: push
+
+jobs:
+  integration-tests:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out main branch
+        uses: actions/checkout@v3
+
+      - name: Setup Scarb
+        uses: software-mansion/[email protected]
+
+      - name: Install project
+        run: yarn install --frozen-lockfile
+
+      - name: Start devnet in background
+        run: scarb run start-devnet
+
+      - name: Run integration tests
+        run: scarb --release build && tsc && yarn mocha tests-integration/*.test.ts --forbid-only --forbid-pending
+
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Step 1 - Check out main branch
+        uses: actions/checkout@v3
+
+      - name: Step 2 - Install project
+        run: yarn install --frozen-lockfile
+
+      - name: Step 3 - Check correct formatting
+        run: yarn prettier --check .
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Step 1 - Check out main branch
+        uses: actions/checkout@v3
+
+      - name: Step 2 - Install project
+        run: yarn install --frozen-lockfile
+
+      - name: Step 3 - Check correct linting
+        run: yarn eslint .

.gitignore

@@ -0,0 +1,45 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules
+jspm_packages
+
+# Optional npm cache directory
+.npm
+
+# Optional REPL history
+.node_repl_history
+.next
+
+# Cairo
+target
+.snfoundry_cache/
+
+.env
+dist

.mocharc.json

@@ -0,0 +1,7 @@
+{
+  "extensions": ["ts"],
+  "test": ["tests/**.ts"],
+  "node-option": ["loader=ts-node/esm"],
+  "slow": 5000,
+  "timeout": 300000
+}

.nvmrc

@@ -0,0 +1 @@
+18

.prettierignore

@@ -0,0 +1,8 @@
+cairo
+venv
+target
+deployments/artifacts
+dist
+.github
+tests-integration/fixtures
+starknet-devnet-rs

.prettierrc

@@ -0,0 +1,9 @@
+{
+  "arrowParens": "always",
+  "useTabs": false,
+  "trailingComma": "all",
+  "singleQuote": false,
+  "semi": true,
+  "printWidth": 120,
+  "plugins": ["prettier-plugin-organize-imports"]
+}

.tool-versions

@@ -0,0 +1,2 @@
+scarb 2.6.3
+starknet-foundry 0.24.0

Dockerfile

@@ -0,0 +1,8 @@
+# Use the base image
+FROM shardlabs/starknet-devnet-rs:c4185522228f61ba04619151eb5706d4610fb00f
+
+# Expose port 5050
+EXPOSE 5050
+
+# Set default command to run the container
+CMD ["--gas-price", "36000000000", "--data-gas-price", "1", "--timeout", "320", "--seed", "0"]

README.md

@@ -0,0 +1,53 @@
+// TODO This is outdated
+
+# Starknet Gifting
+
+The protocol implemented in this repository can be used for gifting tokens to a recipient without giving custody of the tokens to a third party. But it can also be used to transfer tokens to a repicient identified by an email or a phone number. Both products are supported by the same smart-contract and depends solely on the client being built on top.
+
+## High level Flow
+
+- The sender creates a key pair `claim_key` locally and deposits the tokens to transfer to the escrow account together with a small amount of fee token (ETH or STRK) to cover the claim. He provides the public key `claim_key.pub` as an identifier for the transfer.
+- The sender shares the private key `claim_key.priv` with the recipient over an external channel such as email or phone.
+- The recipient claims the tokens by transferring them from the escrow to an account he controls using `claim_key.priv` to sign the transaction.
+
+## Fee
+
+Because the escrow is an account, it can pay for its own transactions and the recipient doesn't need to have funds to initiate the claim. This makes it great to onboard new users that can claim a gift to a newly created and undeployed account.
+
+The Escrow contract can operate in 2 modes depending on the value of the `use_fee` flag.
+
+When `use_fee = false` the sender doesn't need to cover the fee for the claim because the operator of the escrow sponsors the transfers by depositing sufficient ETH or STRK on the escrow contract.
+
+When `use_fee = true` the fee of the claim must be covered by the sender, and he is required to deposit some ETH or STRK together with the token being gifted. The amount of fee token he provides must be sufficient to cover the claim. The recipient of the claim can use up to that value as specified in the max fee of the claim transaction.
+
+If the max fee of the claim transaction is less than the max fee allocated to the claim, the difference is added to a counter and can be later retrieved by the operator of the escrow contract as a paiement for his operation of the protocol. However, the difference between the max fee of the claim transaction and the actual fee of the transaction cannot be acounted for in the contract and will be stuck. We can imagine using that dust later by setting `use_fee = true` and sponsoring gifts for a limited period.
+
+## Canceling Gifts
+
+Gifts can be canceled by the sender provided that they have not been claimed yet. If the gift covers the claim fee the sender can recover both the gift and the claim fee he provided.
+
+In the unlikely event that the recipient tried to claim a gift but the transaction failed in execution, some of the claim fee will have been used. The gift can no longer be claimed but can be canceled by the sender. Canceling the gift will only recover the gift but not the remaining claim fee.
+
+## Development
+
+### asdf
+
+Install asdf following [instructions](https://asdf-vm.com/guide/getting-started.html) and run this
+
+```
+asdf plugin add scarb
+asdf plugin add starknet-foundry
+asdf install
+```
+
+### Setup scarb and foundry
+
+Thanks to the [.tool-versions file](./.tool-versions), you don't need to install a specific scarb or starknet foundry version. The correct one will be automatically downloaded and installed.
+
+### Build the contracts
+
+`scarb build`
+
+### Test the contracts
+
+`snforge test`

Scarb.lock

@@ -0,0 +1,54 @@
+# Code generated by scarb DO NOT EDIT.
+version = 1
+
+[[package]]
+name = "alexandria_data_structures"
+version = "0.2.0"
+source = "git+https://github.com/keep-starknet-strange/alexandria.git?rev=cairo-v2.6.0#946e6e2f9d390ad9f345882a352c0dd6f02ef3ad"
+dependencies = [
+ "alexandria_encoding",
+]
+
+[[package]]
+name = "alexandria_encoding"
+version = "0.1.0"
+source = "git+https://github.com/keep-starknet-strange/alexandria.git?rev=cairo-v2.6.0#946e6e2f9d390ad9f345882a352c0dd6f02ef3ad"
+dependencies = [
+ "alexandria_math",
+ "alexandria_numeric",
+]
+
+[[package]]
+name = "alexandria_math"
+version = "0.2.0"
+source = "git+https://github.com/keep-starknet-strange/alexandria.git?rev=cairo-v2.6.0#946e6e2f9d390ad9f345882a352c0dd6f02ef3ad"
+dependencies = [
+ "alexandria_data_structures",
+]
+
+[[package]]
+name = "alexandria_numeric"
+version = "0.1.0"
+source = "git+https://github.com/keep-starknet-strange/alexandria.git?rev=cairo-v2.6.0#946e6e2f9d390ad9f345882a352c0dd6f02ef3ad"
+dependencies = [
+ "alexandria_math",
+]
+
+[[package]]
+name = "openzeppelin"
+version = "0.13.0"
+source = "git+https://github.com/OpenZeppelin/cairo-contracts.git?tag=v0.13.0#978b4e75209da355667d8954d2450e32bd71fe49"
+
+[[package]]
+name = "snforge_std"
+version = "0.24.0"
+source = "git+https://github.com/foundry-rs/starknet-foundry?tag=v0.24.0#95e9fb09cb91b3c05295915179ee1b55bf923653"
+
+[[package]]
+name = "starknet_gifting"
+version = "0.1.0"
+dependencies = [
+ "alexandria_math",
+ "openzeppelin",
+ "snforge_std",
+]

Scarb.toml

@@ -0,0 +1,27 @@
+[package]
+name = "starknet_gifting"
+version = "0.1.0"
+edition = "2023_10"
+
+
+[dependencies]
+starknet = "2.6.3"
+snforge_std = { git = "https://github.com/foundry-rs/starknet-foundry", tag = "v0.24.0" }
+openzeppelin = { git = "https://github.com/OpenZeppelin/cairo-contracts.git", tag = "v0.13.0" }
+alexandria_math = { git = "https://github.com/keep-starknet-strange/alexandria.git", rev = "cairo-v2.6.0" }
+
+[[target.starknet-contract]]
+sierra = true
+casm = true
+
+[tool.fmt]
+max-line-length = 120
+sort-module-level-items = true
+
+[scripts]
+test = "snforge test"
+start-devnet = "docker build -t devnet . && docker run -d -p 127.0.0.1:5050:5050 devnet"
+kill-devnet = "docker ps -q --filter 'ancestor=devnet' | xargs docker stop"
+test-ts = "scarb --profile release build && yarn tsc && yarn mocha tests-integration/*.test.ts"
+profile = "scarb --profile release build && node --loader ts-node/esm scripts/profile.ts"
+format = "scarb fmt && yarn prettier --write ."

deployments.md

@@ -0,0 +1,4 @@
+## Sepolia
+
+classhash: 0x5908a9e0785fe551d52413f2289c5c1436a8a7086d569829d0ff10443bf790
+Escrow: 0x1748e6a718e66dd6602be9424fc206988cf8ff807d0a5922bbc2ad4253a2a2f

gas-report.txt

@@ -0,0 +1,18 @@
+Summary:
+┌───────────────────────┬─────────────────────┬─────────┬────────────────┬────────────────┬─────────────────┬───────────┬──────────────┬──────────────────────────────┬───────────────┬────────┬─────────┐
+│        (index)        │     Actual fee      │ Fee usd │ Fee without DA │ Gas without DA │ Computation gas │ Event gas │ Calldata gas │ Max computation per Category │ Storage diffs │ DA fee │ DA mode │
+├───────────────────────┼─────────────────────┼─────────┼────────────────┼────────────────┼─────────────────┼───────────┼──────────────┼──────────────────────────────┼───────────────┼────────┼─────────┤
+│ Deposit (txV3: false) │ '1.152.000.000.352' │ 0.0046  │ 1152000000000  │       32       │       31        │     4     │      1       │           'steps'            │       4       │  352   │ 'BLOB'  │
+│  Claim (txV3: false)  │ '1.260.000.000.192' │  0.005  │ 1260000000000  │       35       │       34        │     2     │      1       │           'steps'            │       3       │  192   │ 'BLOB'  │
+│ Deposit (txV3: true)  │ '1.152.000.000.480' │ 0.0046  │ 1152000000000  │       32       │       31        │     4     │      1       │           'steps'            │       5       │  480   │ 'BLOB'  │
+│  Claim (txV3: true)   │ '1.260.000.000.192' │    0    │ 1260000000000  │       35       │       34        │     2     │      1       │           'steps'            │       3       │  192   │ 'BLOB'  │
+└───────────────────────┴─────────────────────┴─────────┴────────────────┴────────────────┴─────────────────┴───────────┴──────────────┴──────────────────────────────┴───────────────┴────────┴─────────┘
+Resources:
+┌───────────────────────┬─────────┬───────┬───────┬────────┬──────────┬──────────┬─────────────┬───────┐
+│        (index)        │ bitwise │ ec_op │ ecdsa │ keccak │ pedersen │ poseidon │ range_check │ steps │
+├───────────────────────┼─────────┼───────┼───────┼────────┼──────────┼──────────┼─────────────┼───────┤
+│ Deposit (txV3: false) │    0    │   3   │   0   │   0    │    38    │    0     │     277     │ 12098 │
+│  Claim (txV3: false)  │    0    │   3   │   0   │   0    │    71    │    0     │     456     │ 13231 │
+│ Deposit (txV3: true)  │    0    │   3   │   0   │   0    │    38    │    0     │     277     │ 12099 │
+│  Claim (txV3: true)   │    0    │   3   │   0   │   0    │    71    │    0     │     490     │ 13429 │
+└───────────────────────┴─────────┴───────┴───────┴────────┴──────────┴──────────┴─────────────┴───────┘