Add Mevshare protocol

README.md

@@ -39,3 +39,27 @@ contract Example {
     }
 }
 ```
+
+### protocols/MevShare.sol
+
+Helper library to send bundle requests with the Mev-Share protocol.
+
+#### Example usage
+
+```solidity
+import "suave-std/protocols/MevShare.sol";
+
+contract Example {
+    function example() {
+        Transactions.Legacy memory legacyTxn0 = Transactions.Legacy({});
+        bytes memory rlp = Transactions.encodeRLP(legacyTxn0);
+
+        MevShare.Bundle memory bundle;
+        bundle.bodies = new bytes[](1);
+        bundle.bodies[0] = rlp;
+        // ...
+
+        MevShare.sendBundle(bundle);
+    }
+}
+```

src/protocols/MevShare.sol

@@ -0,0 +1,78 @@
+// SPDX-License-Identifier: Unlicense
+pragma solidity ^0.8.13;
+
+import "../suavelib/Suave.sol";
+import "solady/src/utils/LibString.sol";
+import "solady/src/utils/JSONParserLib.sol";
+
+// https://github.com/flashbots/mev-share/blob/main/specs/bundles/v0.1.md#json-rpc-request-scheme
+library MevShare {
+    struct Bundle {
+        string version;
+        uint64 inclusionBlock;
+        bytes[] bodies;
+        bool[] canRevert;
+        uint8[] refundPercents;
+    }
+
+    function encodeBundle(Bundle memory bundle) internal pure returns (bytes memory) {
+        require(bundle.bodies.length == bundle.canRevert.length, "MevShare: bodies and canRevert length mismatch");
+        bytes memory body = abi.encodePacked('{"jsonrpc":"2.0","method":"mev_sendBundle","params":[{');
+
+        // -> inclusion
+        body =
+            abi.encodePacked(body, '"inclusion":{"block":"', LibString.toMinimalHexString(bundle.inclusionBlock), '"},');
+
+        // -> body
+        body = abi.encodePacked(body, '"body":[');
+
+        for (uint256 i = 0; i < bundle.bodies.length; i++) {
+            body = abi.encodePacked(
+                body,
+                '{"tx":"',
+                LibString.toHexString(bundle.bodies[i]),
+                '","canRevert":',
+                bundle.canRevert[i] ? "true" : "false",
+                "}"
+            );
+
+            if (i < bundle.bodies.length - 1) {
+                body = abi.encodePacked(body, ",");
+            }
+        }
+
+        body = abi.encodePacked(body, "],");
+
+        // -> validity
+        body = abi.encodePacked(body, '"validity":{"refund":[');
+
+        for (uint256 i = 0; i < bundle.refundPercents.length; i++) {
+            body = abi.encodePacked(
+                body,
+                '{"bodyIdx":',
+                LibString.toString(i),
+                ',"percent":',
+                LibString.toString(bundle.refundPercents[i]),
+                "}"
+            );
+
+            if (i < bundle.refundPercents.length - 1) {
+                body = abi.encodePacked(body, ",");
+            }
+        }
+
+        body = abi.encodePacked(body, "]}");
+        return body;
+    }
+
+    function sendBundle(string memory url, Bundle memory bundle) internal view {
+        Suave.HttpRequest memory request;
+        request.url = url;
+        request.headers = new string[](1);
+        request.headers[0] = "Content-Type:application/json";
+        request.body = encodeBundle(bundle);
+        // TODO: Add Flashbots signature
+
+        Suave.doHTTPRequest(request);
+    }
+}

test/protocols/MevShare.t.sol

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: UNLICENSED
+pragma solidity ^0.8.13;
+
+import "forge-std/Test.sol";
+import "src/protocols/MevShare.sol";
+
+contract MevShareTest is Test {
+    function testEncodeMevShare() public {
+        MevShare.Bundle memory bundle;
+        bundle.version = "";
+        bundle.inclusionBlock = 1;
+
+        bundle.bodies = new bytes[](1);
+        bundle.bodies[0] = abi.encode(1234);
+
+        bundle.canRevert = new bool[](1);
+        bundle.canRevert[0] = true;
+
+        bundle.refundPercents = new uint8[](1);
+        bundle.refundPercents[0] = 10;
+
+        bytes memory res = MevShare.encodeBundle(bundle);
+        assertEq(
+            string(res),
+            '{"jsonrpc":"2.0","method":"mev_sendBundle","params":[{"inclusion":{"block":"0x1"},"body":[{"tx":"0x00000000000000000000000000000000000000000000000000000000000004d2","canRevert":true}],"validity":{"refund":[{"bodyIdx":0,"percent":10}]}'
+        );
+    }
+}