PoC Smart Escrows (#5340)

* wasmedge in unittest

* add WashVM.h and cpp

* accountID comparison (vector<u8>) working

* json decode tx and ledger object with two buffers working

* wasm return a buffer working

* add a failure test case to P2P3

* host function return ledger sqn

* instruction gas and host function gas

* basics

* add scaffold

* add amendment check

* working PoC

* get test working

* fix clang-format

* prototype #2

* p2p3

* [WIP] P4

* P5

* add calculateBaseFee

* add FinishFunction preflight checks (+ tests)

* additional reserve for sfFinishFunction

* higher fees for EscrowFinish

* rename amendment to SmartEscrow

* make fee voting changes, add basic tests

* clean up

* clean up

* clean up

* more cleanup

* add subscribe tests

* add more tests

* undo formatting

* undo formatting

* remove bad comment

* more debugging statements

* fix clang-format

* fix rebase issues

* fix more rebase issues

* more rebase fixes

* add source code for wasm

* respond to comments

* add const

---------

Co-authored-by: Peng Wang <pwang200@gmail.com>

conanfile.py

@@ -2,6 +2,7 @@ from conan import ConanFile
 from conan.tools.cmake import CMake, CMakeToolchain, cmake_layout
 import re
 
+
 class Xrpl(ConanFile):
     name = 'xrpl'
 
@@ -32,6 +33,7 @@ class Xrpl(ConanFile):
         'soci/4.0.3',
         'xxhash/0.8.2',
         'zlib/1.3.1',
+        'wasmedge/0.14.1',
     ]
 
     tool_requires = [
@@ -125,6 +127,7 @@ class Xrpl(ConanFile):
         self.folders.generators = 'build/generators'
 
     generators = 'CMakeDeps'
+
     def generate(self):
         tc = CMakeToolchain(self)
         tc.variables['tests'] = self.options.tests