Add transferStakeFrom and approve functions to staking precompile

contract-tests/src/contracts/staking.ts

@@ -454,5 +454,141 @@ export const IStakingV2ABI = [
         "outputs": [],
         "stateMutability": "payable",
         "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "bytes32",
+                "name": "spenderColdkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "uint256",
+                "name": "netuid",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "absoluteAmount",
+                "type": "uint256"
+            }
+        ],
+        "name": "approve",
+        "outputs": [],
+        "stateMutability": "",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "bytes32",
+                "name": "sourceColdkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "spenderColdkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "uint256",
+                "name": "netuid",
+                "type": "uint256"
+            }
+        ],
+        "name": "allowance",
+        "outputs": [
+            {
+                "internalType": "uint256",
+                "name": "",
+                "type": "uint256"
+            }
+        ],
+        "stateMutability": "view",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "bytes32",
+                "name": "spenderColdkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "uint256",
+                "name": "netuid",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "increaseAmount",
+                "type": "uint256"
+            }
+        ],
+        "name": "increaseAllowance",
+        "outputs": [],
+        "stateMutability": "",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "bytes32",
+                "name": "spenderColdkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "uint256",
+                "name": "netuid",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "decreaseAmount",
+                "type": "uint256"
+            }
+        ],
+        "name": "decreaseAllowance",
+        "outputs": [],
+        "stateMutability": "",
+        "type": "function"
+    },
+    {
+        "inputs": [
+            {
+                "internalType": "bytes32",
+                "name": "source_coldkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "destination_coldkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "bytes32",
+                "name": "hotkey",
+                "type": "bytes32"
+            },
+            {
+                "internalType": "uint256",
+                "name": "origin_netuid",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "destination_netuid",
+                "type": "uint256"
+            },
+            {
+                "internalType": "uint256",
+                "name": "amount",
+                "type": "uint256"
+            }
+        ],
+        "name": "transferStakeFrom",
+        "outputs": [],
+        "stateMutability": "",
+        "type": "function"
     }
-];
+];

contract-tests/test/staking.precompile.approval.test.ts

@@ -0,0 +1,241 @@
+import * as assert from "assert";
+import { getDevnetApi, getRandomSubstrateKeypair } from "../src/substrate"
+import { devnet } from "@polkadot-api/descriptors"
+import { PolkadotSigner, TypedApi } from "polkadot-api";
+import { convertPublicKeyToSs58, convertH160ToSS58 } from "../src/address-utils"
+import { raoToEth, tao } from "../src/balance-math"
+import { ethers } from "ethers"
+import { generateRandomEthersWallet, getPublicClient } from "../src/utils"
+import { convertH160ToPublicKey } from "../src/address-utils"
+import {
+    forceSetBalanceToEthAddress, forceSetBalanceToSs58Address, addNewSubnetwork, burnedRegister,
+    sendProxyCall,
+    startCall,
+} from "../src/subtensor"
+import { ETH_LOCAL_URL } from "../src/config";
+import { ISTAKING_ADDRESS, ISTAKING_V2_ADDRESS, IStakingABI, IStakingV2ABI } from "../src/contracts/staking"
+import { PublicClient } from "viem";
+
+describe("Test approval in staking precompile", () => {
+    // init eth part
+    const wallet1 = generateRandomEthersWallet();
+    const wallet2 = generateRandomEthersWallet();
+    let publicClient: PublicClient;
+    // init substrate part
+    const hotkey = getRandomSubstrateKeypair();
+    const coldkey = getRandomSubstrateKeypair();
+    const proxy = getRandomSubstrateKeypair();
+
+    let api: TypedApi<typeof devnet>
+    let stakeNetuid: number;
+
+    let expectedAllowance = BigInt(0);
+
+    // sudo account alice as signer
+    let alice: PolkadotSigner;
+    before(async () => {
+        publicClient = await getPublicClient(ETH_LOCAL_URL)
+        // init variables got from await and async
+        api = await getDevnetApi()
+
+        // await forceSetBalanceToSs58Address(api, convertPublicKeyToSs58(alice.publicKey))
+        await forceSetBalanceToSs58Address(api, convertPublicKeyToSs58(hotkey.publicKey))
+        await forceSetBalanceToSs58Address(api, convertPublicKeyToSs58(coldkey.publicKey))
+        await forceSetBalanceToSs58Address(api, convertPublicKeyToSs58(proxy.publicKey))
+        await forceSetBalanceToEthAddress(api, wallet1.address)
+        await forceSetBalanceToEthAddress(api, wallet2.address)
+        let netuid = await addNewSubnetwork(api, hotkey, coldkey)
+        await startCall(api, netuid, coldkey)
+
+        console.log("test the case on subnet ", netuid)
+
+        await burnedRegister(api, netuid, convertH160ToSS58(wallet1.address), coldkey)
+        await burnedRegister(api, netuid, convertH160ToSS58(wallet2.address), coldkey)
+
+        // add stake as wallet1
+        {
+            stakeNetuid = (await api.query.SubtensorModule.TotalNetworks.getValue()) - 1
+            // the unit in V2 is RAO, not ETH
+            let stakeBalance = tao(20)
+            const stakeBefore = await api.query.SubtensorModule.Alpha.getValue(convertPublicKeyToSs58(hotkey.publicKey), convertH160ToSS58(wallet1.address), stakeNetuid)
+            const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet1);
+            const tx = await contract.addStake(hotkey.publicKey, stakeBalance.toString(), stakeNetuid)
+            await tx.wait()
+
+            const stakeFromContract = BigInt(
+                await contract.getStake(hotkey.publicKey, convertH160ToPublicKey(wallet1.address), stakeNetuid)
+            );
+
+            assert.ok(stakeFromContract > stakeBefore)
+            const stakeAfter = await api.query.SubtensorModule.Alpha.getValue(convertPublicKeyToSs58(hotkey.publicKey), convertH160ToSS58(wallet1.address), stakeNetuid)
+            assert.ok(stakeAfter > stakeBefore)
+        }
+    })
+
+    it("Can't transfer from account without approval", async () => {
+        try {
+            // wallet2 tries to transfer from wallet1
+            const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet2);
+            const tx = await contract.transferStakeFrom(
+                convertH160ToPublicKey(wallet1.address), // source
+                convertH160ToPublicKey(wallet2.address), // distination
+                hotkey.publicKey,
+                stakeNetuid,
+                stakeNetuid,
+                1
+            )
+            await tx.wait();
+
+            assert.fail("should have reverted due to missing allowance");
+        } catch (e) {
+            assert.equal(e.reason, "trying to spend more than allowed", "wrong revert message");
+        }
+    })
+
+    it("Can approve some amount", async () => {
+        const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet1);
+
+        {
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "default allowance should be 0");
+        }
+
+        {
+            const tx = await contract.approve(
+                convertH160ToPublicKey(wallet2.address), // destination
+                stakeNetuid,
+                tao(10)
+            )
+            await tx.wait();
+
+            expectedAllowance += BigInt(tao(10));
+
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "should have set allowance");
+        }
+    })
+
+    it("Can now use transfer from", async () => {
+        const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet2);
+
+        // wallet2 transfer from wallet1
+        const tx = await contract.transferStakeFrom(
+            convertH160ToPublicKey(wallet1.address), // source
+            convertH160ToPublicKey(wallet2.address), // distination
+            hotkey.publicKey,
+            stakeNetuid,
+            stakeNetuid,
+            tao(5)
+        )
+        await tx.wait();
+
+        expectedAllowance -= BigInt(tao(5));
+
+        {
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "allowance should now be 500");
+        }
+    })
+
+    it("Can't use transfer from with amount too high", async () => {
+        try {
+            // wallet2 tries to transfer from wallet1
+            const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet2);
+            const tx = await contract.transferStakeFrom(
+                convertH160ToPublicKey(wallet1.address), // source
+                convertH160ToPublicKey(wallet2.address), // distination
+                hotkey.publicKey,
+                stakeNetuid,
+                stakeNetuid,
+                expectedAllowance + BigInt(1)
+            )
+            await tx.wait();
+
+            assert.fail("should have reverted due to missing allowance");
+        } catch (e) {
+            assert.equal(e.reason, "trying to spend more than allowed", "wrong revert message");
+        }
+    })
+
+    it("Approval functions works as expected", async () => {
+        const contract = new ethers.Contract(ISTAKING_V2_ADDRESS, IStakingV2ABI, wallet1);
+
+        {
+            const tx = await contract.increaseAllowance(
+                convertH160ToPublicKey(wallet2.address), // destination
+                stakeNetuid,
+                tao(10)
+            )
+            await tx.wait();
+
+            expectedAllowance += BigInt(tao(10));
+
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "allowance have been increased correctly");
+        }
+
+        {
+            const tx = await contract.decreaseAllowance(
+                convertH160ToPublicKey(wallet2.address), // destination
+                stakeNetuid,
+                tao(2)
+            )
+            await tx.wait();
+
+            expectedAllowance -= BigInt(tao(2));
+
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "allowance have been decreased correctly");
+        }
+
+        {
+            const tx = await contract.approve(
+                convertH160ToPublicKey(wallet2.address), // destination
+                stakeNetuid,
+                0
+            )
+            await tx.wait();
+
+            expectedAllowance = BigInt(0);
+
+            let allowance = BigInt(
+                await contract.allowance(
+                    convertH160ToPublicKey(wallet1.address), // source
+                    convertH160ToPublicKey(wallet2.address), // destination
+                    stakeNetuid,
+                )
+            );
+            assert.equal(allowance, expectedAllowance, "allowance have been overwritten correctly");
+        }
+    })
+})