fix(test): making tests type-safe (#318)

packages/protocol/contracts/bridge/libs/LibBridgeProcess.sol

@@ -95,6 +95,7 @@ library LibBridgeProcess {
             uint256 gasLimit = msg.sender == message.owner
                 ? gasleft()
                 : message.gasLimit;
+
             bool success = LibBridgeInvoke.invokeMessageCall({
                 state: state,
                 message: message,

packages/protocol/tasks/utils.ts

@@ -1,5 +1,7 @@
 import * as fs from "fs"
 import * as log from "./log"
+import { Block, BlockHeader, EthGetProofResponse } from "../test/utils/rpc"
+import RLP from "rlp"
 
 async function deployContract(
     hre: any,
@@ -84,6 +86,67 @@ const MessageStatus = {
     FAILED: 3,
 }
 
+async function getLatestBlockHeader(hre: any) {
+    const block: Block = await hre.ethers.provider.send(
+        "eth_getBlockByNumber",
+        ["latest", false]
+    )
+
+    const logsBloom = block.logsBloom.toString().substring(2)
+
+    const blockHeader: BlockHeader = {
+        parentHash: block.parentHash,
+        ommersHash: block.sha3Uncles,
+        beneficiary: block.miner,
+        stateRoot: block.stateRoot,
+        transactionsRoot: block.transactionsRoot,
+        receiptsRoot: block.receiptsRoot,
+        logsBloom: logsBloom.match(/.{1,64}/g)!.map((s: string) => "0x" + s),
+        difficulty: block.difficulty,
+        height: block.number,
+        gasLimit: block.gasLimit,
+        gasUsed: block.gasUsed,
+        timestamp: block.timestamp,
+        extraData: block.extraData,
+        mixHash: block.mixHash,
+        nonce: block.nonce,
+        baseFeePerGas: block.baseFeePerGas ? parseInt(block.baseFeePerGas) : 0,
+    }
+
+    return { block, blockHeader }
+}
+
+async function getSignalProof(
+    hre: any,
+    contractAddress: string,
+    key: string,
+    blockNumber: number,
+    blockHeader: BlockHeader
+) {
+    const proof: EthGetProofResponse = await hre.ethers.provider.send(
+        "eth_getProof",
+        [contractAddress, [key], blockNumber]
+    )
+
+    // RLP encode the proof together for LibTrieProof to decode
+    const encodedProof = hre.ethers.utils.defaultAbiCoder.encode(
+        ["bytes", "bytes"],
+        [
+            RLP.encode(proof.accountProof),
+            RLP.encode(proof.storageProof[0].proof),
+        ]
+    )
+    // encode the SignalProof struct from LibBridgeSignal
+    const signalProof = hre.ethers.utils.defaultAbiCoder.encode(
+        [
+            "tuple(tuple(bytes32 parentHash, bytes32 ommersHash, address beneficiary, bytes32 stateRoot, bytes32 transactionsRoot, bytes32 receiptsRoot, bytes32[8] logsBloom, uint256 difficulty, uint128 height, uint64 gasLimit, uint64 gasUsed, uint64 timestamp, bytes extraData, bytes32 mixHash, uint64 nonce, uint256 baseFeePerGas) header, bytes proof)",
+        ],
+        [{ header: blockHeader, proof: encodedProof }]
+    )
+
+    return signalProof
+}
+
 export {
     deployContract,
     getDeployer,
@@ -94,4 +157,6 @@ export {
     getSlot,
     decode,
     MessageStatus,
+    getLatestBlockHeader,
+    getSignalProof,
 }