From 64ae1d0a30889b3905236144d71287426aba0294 Mon Sep 17 00:00:00 2001
From: Rohit Narurkar <rohit.narurkar@protonmail.com>
Date: Wed, 10 Mar 2021 12:09:03 +0530
Subject: [PATCH] port solana-ffi from multichain

---
 .gitignore         |    8 +
 Makefile           |   20 +
 cgo/cgo.go         |  143 ++
 cgo/cgo_helpers.go |  158 ++
 go.mod             |    3 +
 rust/.gitignore    |    1 +
 rust/Cargo.lock    | 3996 ++++++++++++++++++++++++++++++++++++++++++++
 rust/Cargo.toml    |   24 +
 rust/build.rs      |   15 +
 rust/cbindgen.toml |   18 +
 rust/src/lib.rs    |  377 +++++
 rust/src/util.rs   |   95 ++
 solana-ffi.yml     |   53 +
 13 files changed, 4911 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Makefile
 create mode 100644 cgo/cgo.go
 create mode 100644 cgo/cgo_helpers.go
 create mode 100644 go.mod
 create mode 100644 rust/.gitignore
 create mode 100644 rust/Cargo.lock
 create mode 100644 rust/Cargo.toml
 create mode 100644 rust/build.rs
 create mode 100644 rust/cbindgen.toml
 create mode 100644 rust/src/lib.rs
 create mode 100644 rust/src/util.rs
 create mode 100644 solana-ffi.yml

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..acbdaac
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+**/.install-solana-ffi
+**/*.a
+**/*.h
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..0e3eb58
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,20 @@
+DEPS:=solana-ffi.h libsolana-ffi.a
+
+all: $(DEPS)
+.PHONY: all
+
+$(DEPS): .install-solana-ffi  ;
+
+.install-solana-ffi: rust
+	cd rust && cargo build --release --all; cd ..
+	find ./rust/target/release -type f -name "solana-ffi.h" -print0 | xargs -0 ls -t | head -n 1 | xargs -I {} cp {} ./cgo/solana-ffi.h
+	find ./rust/target/release -type f -name "libsolana_ffi.a" -print0 | xargs -0 ls -t | head -n 1 | xargs -I {} cp {} ./cgo/libsolana_ffi.a
+	c-for-go --ccincl solana-ffi.yml
+	@touch $@
+
+clean:
+	rm -rf $(DEPS) .install-solana-ffi
+	rm -rf cgo/*.go
+	rm -rf cgo/*.h
+	rm -rf cgo/*.a
+.PHONY: clean
diff --git a/cgo/cgo.go b/cgo/cgo.go
new file mode 100644
index 0000000..00860cd
--- /dev/null
+++ b/cgo/cgo.go
@@ -0,0 +1,143 @@
+// WARNING: This file has automatically been generated on Wed, 10 Mar 2021 12:03:59 IST.
+// Code generated by https://git.io/c-for-go. DO NOT EDIT.
+
+package cgo
+
+/*
+#cgo LDFLAGS: -L${SRCDIR} -lsolana_ffi
+#cgo linux LDFLAGS: -lcrypto -ldl -lm -lrt -lssl -ludev
+#cgo darwin LDFLAGS: -F/Library/Frameworks -framework Security -framework CoreServices -framework IOKit -framework IOSurface -framework AppKit
+#include "solana-ffi.h"
+#include <stdlib.h>
+#include "cgo_helpers.h"
+*/
+import "C"
+import (
+	"runtime"
+	"unsafe"
+)
+
+// UniquePubkey function as declared in cgo/solana-ffi.h:17
+func UniquePubkey() string {
+	__ret := C.unique_pubkey()
+	__v := packPCharString(__ret)
+	return __v
+}
+
+// ProgramDerivedAddress function as declared in cgo/solana-ffi.h:19
+func ProgramDerivedAddress(seedsPointer []byte, seedsSize uint32, program string) string {
+	cseedsPointer, cseedsPointerAllocMap := copyPUint8TBytes((*sliceHeader)(unsafe.Pointer(&seedsPointer)))
+	cseedsSize, cseedsSizeAllocMap := (C.size_t)(seedsSize), cgoAllocsUnknown
+	program = safeString(program)
+	cprogram, cprogramAllocMap := unpackPCharString(program)
+	__ret := C.program_derived_address(cseedsPointer, cseedsSize, cprogram)
+	runtime.KeepAlive(program)
+	runtime.KeepAlive(cprogramAllocMap)
+	runtime.KeepAlive(cseedsSizeAllocMap)
+	runtime.KeepAlive(cseedsPointerAllocMap)
+	__v := packPCharString(__ret)
+	return __v
+}
+
+// GatewayInitialize function as declared in cgo/solana-ffi.h:23
+func GatewayInitialize(keypairPath string, rpcUrl string, authorityPointer []byte, selector string) string {
+	keypairPath = safeString(keypairPath)
+	ckeypairPath, ckeypairPathAllocMap := unpackPCharString(keypairPath)
+	rpcUrl = safeString(rpcUrl)
+	crpcUrl, crpcUrlAllocMap := unpackPCharString(rpcUrl)
+	cauthorityPointer, cauthorityPointerAllocMap := copyPUint8TBytes((*sliceHeader)(unsafe.Pointer(&authorityPointer)))
+	selector = safeString(selector)
+	cselector, cselectorAllocMap := unpackPCharString(selector)
+	__ret := C.gateway_initialize(ckeypairPath, crpcUrl, cauthorityPointer, cselector)
+	runtime.KeepAlive(selector)
+	runtime.KeepAlive(cselectorAllocMap)
+	runtime.KeepAlive(cauthorityPointerAllocMap)
+	runtime.KeepAlive(rpcUrl)
+	runtime.KeepAlive(crpcUrlAllocMap)
+	runtime.KeepAlive(keypairPath)
+	runtime.KeepAlive(ckeypairPathAllocMap)
+	__v := packPCharString(__ret)
+	return __v
+}
+
+// GatewayInitializeAccount function as declared in cgo/solana-ffi.h:28
+func GatewayInitializeAccount(keypairPath string, rpcUrl string, selector string) string {
+	keypairPath = safeString(keypairPath)
+	ckeypairPath, ckeypairPathAllocMap := unpackPCharString(keypairPath)
+	rpcUrl = safeString(rpcUrl)
+	crpcUrl, crpcUrlAllocMap := unpackPCharString(rpcUrl)
+	selector = safeString(selector)
+	cselector, cselectorAllocMap := unpackPCharString(selector)
+	__ret := C.gateway_initialize_account(ckeypairPath, crpcUrl, cselector)
+	runtime.KeepAlive(selector)
+	runtime.KeepAlive(cselectorAllocMap)
+	runtime.KeepAlive(rpcUrl)
+	runtime.KeepAlive(crpcUrlAllocMap)
+	runtime.KeepAlive(keypairPath)
+	runtime.KeepAlive(ckeypairPathAllocMap)
+	__v := packPCharString(__ret)
+	return __v
+}
+
+// GatewayGetBurnCount function as declared in cgo/solana-ffi.h:32
+func GatewayGetBurnCount(rpcUrl string) uint64 {
+	rpcUrl = safeString(rpcUrl)
+	crpcUrl, crpcUrlAllocMap := unpackPCharString(rpcUrl)
+	__ret := C.gateway_get_burn_count(crpcUrl)
+	runtime.KeepAlive(rpcUrl)
+	runtime.KeepAlive(crpcUrlAllocMap)
+	__v := (uint64)(__ret)
+	return __v
+}
+
+// GatewayMint function as declared in cgo/solana-ffi.h:34
+func GatewayMint(keypairPath string, rpcUrl string, authoritySecret string, selector string, amount uint64) string {
+	keypairPath = safeString(keypairPath)
+	ckeypairPath, ckeypairPathAllocMap := unpackPCharString(keypairPath)
+	rpcUrl = safeString(rpcUrl)
+	crpcUrl, crpcUrlAllocMap := unpackPCharString(rpcUrl)
+	authoritySecret = safeString(authoritySecret)
+	cauthoritySecret, cauthoritySecretAllocMap := unpackPCharString(authoritySecret)
+	selector = safeString(selector)
+	cselector, cselectorAllocMap := unpackPCharString(selector)
+	camount, camountAllocMap := (C.ulonglong)(amount), cgoAllocsUnknown
+	__ret := C.gateway_mint(ckeypairPath, crpcUrl, cauthoritySecret, cselector, camount)
+	runtime.KeepAlive(camountAllocMap)
+	runtime.KeepAlive(selector)
+	runtime.KeepAlive(cselectorAllocMap)
+	runtime.KeepAlive(authoritySecret)
+	runtime.KeepAlive(cauthoritySecretAllocMap)
+	runtime.KeepAlive(rpcUrl)
+	runtime.KeepAlive(crpcUrlAllocMap)
+	runtime.KeepAlive(keypairPath)
+	runtime.KeepAlive(ckeypairPathAllocMap)
+	__v := packPCharString(__ret)
+	return __v
+}
+
+// GatewayBurn function as declared in cgo/solana-ffi.h:40
+func GatewayBurn(keypairPath string, rpcUrl string, selector string, burnCount uint64, burnAmount uint64, recipientLen uint32, recipientPointer []byte) string {
+	keypairPath = safeString(keypairPath)
+	ckeypairPath, ckeypairPathAllocMap := unpackPCharString(keypairPath)
+	rpcUrl = safeString(rpcUrl)
+	crpcUrl, crpcUrlAllocMap := unpackPCharString(rpcUrl)
+	selector = safeString(selector)
+	cselector, cselectorAllocMap := unpackPCharString(selector)
+	cburnCount, cburnCountAllocMap := (C.ulonglong)(burnCount), cgoAllocsUnknown
+	cburnAmount, cburnAmountAllocMap := (C.ulonglong)(burnAmount), cgoAllocsUnknown
+	crecipientLen, crecipientLenAllocMap := (C.size_t)(recipientLen), cgoAllocsUnknown
+	crecipientPointer, crecipientPointerAllocMap := copyPUint8TBytes((*sliceHeader)(unsafe.Pointer(&recipientPointer)))
+	__ret := C.gateway_burn(ckeypairPath, crpcUrl, cselector, cburnCount, cburnAmount, crecipientLen, crecipientPointer)
+	runtime.KeepAlive(crecipientPointerAllocMap)
+	runtime.KeepAlive(crecipientLenAllocMap)
+	runtime.KeepAlive(cburnAmountAllocMap)
+	runtime.KeepAlive(cburnCountAllocMap)
+	runtime.KeepAlive(selector)
+	runtime.KeepAlive(cselectorAllocMap)
+	runtime.KeepAlive(rpcUrl)
+	runtime.KeepAlive(crpcUrlAllocMap)
+	runtime.KeepAlive(keypairPath)
+	runtime.KeepAlive(ckeypairPathAllocMap)
+	__v := packPCharString(__ret)
+	return __v
+}
diff --git a/cgo/cgo_helpers.go b/cgo/cgo_helpers.go
new file mode 100644
index 0000000..122ded9
--- /dev/null
+++ b/cgo/cgo_helpers.go
@@ -0,0 +1,158 @@
+// WARNING: This file has automatically been generated on Wed, 10 Mar 2021 12:03:59 IST.
+// Code generated by https://git.io/c-for-go. DO NOT EDIT.
+
+package cgo
+
+/*
+#cgo LDFLAGS: -L${SRCDIR} -lsolana_ffi
+#cgo linux LDFLAGS: -lcrypto -ldl -lm -lrt -lssl -ludev
+#cgo darwin LDFLAGS: -F/Library/Frameworks -framework Security -framework CoreServices -framework IOKit -framework IOSurface -framework AppKit
+#include "solana-ffi.h"
+#include <stdlib.h>
+#include "cgo_helpers.h"
+*/
+import "C"
+import (
+	"fmt"
+	"runtime"
+	"sync"
+	"unsafe"
+)
+
+// packPCharString creates a Go string backed by *C.char and avoids copying.
+func packPCharString(p *C.char) (raw string) {
+	if p != nil && *p != 0 {
+		h := (*stringHeader)(unsafe.Pointer(&raw))
+		h.Data = unsafe.Pointer(p)
+		for *p != 0 {
+			p = (*C.char)(unsafe.Pointer(uintptr(unsafe.Pointer(p)) + 1)) // p++
+		}
+		h.Len = int(uintptr(unsafe.Pointer(p)) - uintptr(h.Data))
+	}
+	return
+}
+
+type stringHeader struct {
+	Data unsafe.Pointer
+	Len  int
+}
+
+// RawString reperesents a string backed by data on the C side.
+type RawString string
+
+// Copy returns a Go-managed copy of raw string.
+func (raw RawString) Copy() string {
+	if len(raw) == 0 {
+		return ""
+	}
+	h := (*stringHeader)(unsafe.Pointer(&raw))
+	return C.GoStringN((*C.char)(h.Data), C.int(h.Len))
+}
+
+// cgoAllocMap stores pointers to C allocated memory for future reference.
+type cgoAllocMap struct {
+	mux sync.RWMutex
+	m   map[unsafe.Pointer]struct{}
+}
+
+var cgoAllocsUnknown = new(cgoAllocMap)
+
+func (a *cgoAllocMap) Add(ptr unsafe.Pointer) {
+	a.mux.Lock()
+	if a.m == nil {
+		a.m = make(map[unsafe.Pointer]struct{})
+	}
+	a.m[ptr] = struct{}{}
+	a.mux.Unlock()
+}
+
+func (a *cgoAllocMap) IsEmpty() bool {
+	a.mux.RLock()
+	isEmpty := len(a.m) == 0
+	a.mux.RUnlock()
+	return isEmpty
+}
+
+func (a *cgoAllocMap) Borrow(b *cgoAllocMap) {
+	if b == nil || b.IsEmpty() {
+		return
+	}
+	b.mux.Lock()
+	a.mux.Lock()
+	for ptr := range b.m {
+		if a.m == nil {
+			a.m = make(map[unsafe.Pointer]struct{})
+		}
+		a.m[ptr] = struct{}{}
+		delete(b.m, ptr)
+	}
+	a.mux.Unlock()
+	b.mux.Unlock()
+}
+
+func (a *cgoAllocMap) Free() {
+	a.mux.Lock()
+	for ptr := range a.m {
+		C.free(ptr)
+		delete(a.m, ptr)
+	}
+	a.mux.Unlock()
+}
+
+type sliceHeader struct {
+	Data unsafe.Pointer
+	Len  int
+	Cap  int
+}
+
+// copyPUint8TBytes copies the data from Go slice as *C.uint8_t.
+func copyPUint8TBytes(slice *sliceHeader) (*C.uint8_t, *cgoAllocMap) {
+	allocs := new(cgoAllocMap)
+	defer runtime.SetFinalizer(allocs, func(a *cgoAllocMap) {
+		go a.Free()
+	})
+
+	mem0 := unsafe.Pointer(C.CBytes(*(*[]byte)(unsafe.Pointer(&sliceHeader{
+		Data: slice.Data,
+		Len:  int(sizeOfUint8TValue) * slice.Len,
+		Cap:  int(sizeOfUint8TValue) * slice.Len,
+	}))))
+	allocs.Add(mem0)
+
+	return (*C.uint8_t)(mem0), allocs
+}
+
+// allocUint8TMemory allocates memory for type C.uint8_t in C.
+// The caller is responsible for freeing the this memory via C.free.
+func allocUint8TMemory(n int) unsafe.Pointer {
+	mem, err := C.calloc(C.size_t(n), (C.size_t)(sizeOfUint8TValue))
+	if mem == nil {
+		panic(fmt.Sprintln("memory alloc error: ", err))
+	}
+	return mem
+}
+
+const sizeOfUint8TValue = unsafe.Sizeof([1]C.uint8_t{})
+
+// safeString ensures that the string is NULL-terminated, a NULL-terminated copy is created otherwise.
+func safeString(str string) string {
+	if len(str) > 0 && str[len(str)-1] != '\x00' {
+		str = str + "\x00"
+	} else if len(str) == 0 {
+		str = "\x00"
+	}
+	return str
+}
+
+// unpackPCharString copies the data from Go string as *C.char.
+func unpackPCharString(str string) (*C.char, *cgoAllocMap) {
+	allocs := new(cgoAllocMap)
+	defer runtime.SetFinalizer(allocs, func(a *cgoAllocMap) {
+		go a.Free()
+	})
+
+	str = safeString(str)
+	mem0 := unsafe.Pointer(C.CString(str))
+	allocs.Add(mem0)
+	return (*C.char)(mem0), allocs
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..590f543
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module github.com/renproject/solana-ffi
+
+go 1.14
diff --git a/rust/.gitignore b/rust/.gitignore
new file mode 100644
index 0000000..2f7896d
--- /dev/null
+++ b/rust/.gitignore
@@ -0,0 +1 @@
+target/
diff --git a/rust/Cargo.lock b/rust/Cargo.lock
new file mode 100644
index 0000000..71af68f
--- /dev/null
+++ b/rust/Cargo.lock
@@ -0,0 +1,3996 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+[[package]]
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+dependencies = [
+ "lazy_static",
+ "regex",
+]
+
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+ "serde",
+]
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+]
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+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winreg"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0120db82e8a1e0b9fb3345a539c478767c0048d842860994d96113d5b667bd69"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
+[[package]]
+name = "xattr"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "244c3741f4240ef46274860397c7c74e50eb23624996930e484c16679633a54c"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "zeroize"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81a974bcdd357f0dca4d41677db03436324d45a4c9ed2d0b873a5a360ce41c36"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3f369ddb18862aba61aa49bf31e74d29f0f162dec753063200e1dc084345d16"
+dependencies = [
+ "proc-macro2 1.0.24",
+ "quote 1.0.9",
+ "syn 1.0.63",
+ "synstructure",
+]
+
+[[package]]
+name = "zstd"
+version = "0.5.4+zstd.1.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "69996ebdb1ba8b1517f61387a883857818a66c8a295f487b1ffd8fd9d2c82910"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "2.0.6+zstd.1.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "98aa931fb69ecee256d44589d19754e61851ae4769bf963b385119b1cc37a49e"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "1.4.18+zstd.1.4.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1e6e8778706838f43f771d80d37787cb2fe06dafe89dd3aebaf6721b9eaec81"
+dependencies = [
+ "cc",
+ "glob",
+ "itertools",
+ "libc",
+]
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
new file mode 100644
index 0000000..a956d65
--- /dev/null
+++ b/rust/Cargo.toml
@@ -0,0 +1,24 @@
+[package]
+name = "solana-ffi"
+version = "0.1.0"
+authors = ["Rohit Narurkar <rohit.narurkar@protonmail.com>"]
+edition = "2018"
+
+[lib]
+crate-type = ["staticlib"]
+
+[dependencies]
+arrayref = "0.3.6"
+bincode = "1.3.1"
+digest = "0.9.0"
+libc = "0.2.58"
+gateway = { git = "https://github.com/renproject/ren-solana", branch = "master", features = ["no-entrypoint"] }
+renvm-sig = { git = "https://github.com/roynalnaruto/renvm-sig", branch = "master" }
+sha3 = "0.9.1"
+solana-client = "^1.5.0"
+solana-sdk = "^1.5.0"
+spl-associated-token-account = { version = "1.0.0", features = ["no-entrypoint"] }
+spl-token = { version = "3.0.0", features = ["no-entrypoint"] }
+
+[build-dependencies]
+cbindgen = "= 0.15.0"
diff --git a/rust/build.rs b/rust/build.rs
new file mode 100644
index 0000000..5e12c3b
--- /dev/null
+++ b/rust/build.rs
@@ -0,0 +1,15 @@
+extern crate cbindgen;
+
+use std::env;
+use std::path::Path;
+
+fn main() {
+    println!("cargo:rerun-if-changed=src/");
+
+    let out_dir = env::var("OUT_DIR").unwrap();
+    let hdr_out = Path::new(&out_dir).join("include/solana-ffi.h");
+
+    cbindgen::generate(std::env::var("CARGO_MANIFEST_DIR").unwrap())
+        .expect("Could not generate header")
+        .write_to_file(hdr_out);
+}
diff --git a/rust/cbindgen.toml b/rust/cbindgen.toml
new file mode 100644
index 0000000..998608b
--- /dev/null
+++ b/rust/cbindgen.toml
@@ -0,0 +1,18 @@
+header = """
+/* solana-ffi Header */
+#ifdef __cplusplus
+extern "C" {{
+#endif
+"""
+trailer = """
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+"""
+
+include_guard = "SOLANA_FFI_H"
+include_version = true
+language = "C"
+
+[parse]
+parse_deps = false
diff --git a/rust/src/lib.rs b/rust/src/lib.rs
new file mode 100644
index 0000000..aece1ed
--- /dev/null
+++ b/rust/src/lib.rs
@@ -0,0 +1,377 @@
+extern crate libc;
+use arrayref::array_refs;
+use digest::Digest;
+use gateway::{
+    instruction::{burn, initialize, mint},
+    state::Gateway,
+};
+use renvm_sig::{RenVM, RenVmMsgBuilder};
+use solana_client::{rpc_client::RpcClient, rpc_config::RpcSendTransactionConfig};
+use solana_sdk::{
+    commitment_config::CommitmentConfig,
+    program_pack::Pack,
+    pubkey::Pubkey,
+    signature::{read_keypair_file, Signer},
+    transaction::Transaction,
+};
+use spl_associated_token_account::{create_associated_token_account, get_associated_token_address};
+use spl_token::instruction::burn_checked;
+use std::{
+    ffi::{CStr, CString},
+    str::FromStr,
+};
+
+mod util;
+
+#[no_mangle]
+pub extern "C" fn unique_pubkey() -> *const libc::c_char {
+    let pubkey = Pubkey::new_unique();
+    let pubkey = pubkey.to_string();
+    CString::new(pubkey).unwrap().into_raw()
+}
+
+#[no_mangle]
+pub extern "C" fn program_derived_address(
+    seeds_pointer: *const u8,
+    seeds_size: libc::size_t,
+    program: *const libc::c_char,
+) -> *const libc::c_char {
+    let seeds =
+        unsafe { std::slice::from_raw_parts(seeds_pointer as *const u8, seeds_size as usize) };
+
+    let buf_name = unsafe { CStr::from_ptr(program).to_bytes() };
+    let program_str = String::from_utf8(buf_name.to_vec()).unwrap();
+    let program_id = Pubkey::from_str(&program_str).unwrap();
+
+    let (derived_address, _) = Pubkey::find_program_address(&[seeds], &program_id);
+
+    CString::new(derived_address.to_string())
+        .unwrap()
+        .into_raw()
+}
+
+#[no_mangle]
+pub extern "C" fn gateway_initialize(
+    keypair_path: *const libc::c_char,
+    rpc_url: *const libc::c_char,
+    authority_pointer: *const u8,
+    selector: *const libc::c_char,
+) -> *const libc::c_char {
+    // Solana default signer and fee payer.
+    let buf_name = unsafe { CStr::from_ptr(keypair_path).to_bytes() };
+    let keypair_path = String::from_utf8(buf_name.to_vec()).unwrap();
+    let payer = read_keypair_file(&keypair_path).unwrap();
+
+    // Initialize client.
+    let buf_name = unsafe { CStr::from_ptr(rpc_url).to_bytes() };
+    let rpc_url = String::from_utf8(buf_name.to_vec()).unwrap();
+    let rpc_client = RpcClient::new(rpc_url);
+    let commitment_config = CommitmentConfig::confirmed();
+    let (recent_blockhash, _, _) = rpc_client
+        .get_recent_blockhash_with_commitment(commitment_config)
+        .unwrap()
+        .value;
+
+    // Construct the RenVM authority 20-bytes Ethereum compatible address.
+    let authority_slice =
+        unsafe { std::slice::from_raw_parts(authority_pointer as *const u8, 20usize) };
+    let mut authority = [0u8; 20usize];
+    authority.copy_from_slice(authority_slice);
+
+    // Get selector hash.
+    let buf_name = unsafe { CStr::from_ptr(selector).to_bytes() };
+    let selector = String::from_utf8(buf_name.to_vec()).unwrap();
+    let mut hasher = sha3::Keccak256::new();
+    hasher.update(selector.as_bytes());
+    let selector_hash: [u8; 32] = hasher.finalize().into();
+
+    // Find derived address that will hold Gateway's state.
+    let (gateway_account_id, _) = Pubkey::find_program_address(&[b"GatewayState"], &gateway::id());
+
+    // Derived address that will be the token mint.
+    let (token_mint_id, _) = Pubkey::find_program_address(&[&selector_hash[..]], &gateway::id());
+
+    // Build and sign the initialize transaction.
+    let mut tx = Transaction::new_with_payer(
+        &[initialize(
+            &gateway::id(),
+            &payer.pubkey(),
+            &gateway_account_id,
+            authority,
+            &token_mint_id,
+            &spl_token::id(),
+            selector_hash,
+        )
+        .unwrap()],
+        Some(&payer.pubkey()),
+    );
+    tx.sign(&[&payer], recent_blockhash);
+
+    // Broadcast transaction.
+    let signature = rpc_client
+        .send_transaction_with_config(
+            &tx,
+            RpcSendTransactionConfig {
+                preflight_commitment: Some(commitment_config.commitment),
+                ..RpcSendTransactionConfig::default()
+            },
+        )
+        .unwrap();
+
+    CString::new(signature.to_string()).unwrap().into_raw()
+}
+
+#[no_mangle]
+pub extern "C" fn gateway_initialize_account(
+    keypair_path: *const libc::c_char,
+    rpc_url: *const libc::c_char,
+    selector: *const libc::c_char,
+) -> *const libc::c_char {
+    // Solana default signer and fee payer.
+    let buf_name = unsafe { CStr::from_ptr(keypair_path).to_bytes() };
+    let keypair_path = String::from_utf8(buf_name.to_vec()).unwrap();
+    let payer = read_keypair_file(&keypair_path).unwrap();
+
+    // Initialize client.
+    let buf_name = unsafe { CStr::from_ptr(rpc_url).to_bytes() };
+    let rpc_url = String::from_utf8(buf_name.to_vec()).unwrap();
+    let rpc_client = RpcClient::new(rpc_url);
+    let commitment_config = CommitmentConfig::confirmed();
+    let (recent_blockhash, _, _) = rpc_client
+        .get_recent_blockhash_with_commitment(commitment_config)
+        .unwrap()
+        .value;
+
+    // Get selector hash.
+    let buf_name = unsafe { CStr::from_ptr(selector).to_bytes() };
+    let selector = String::from_utf8(buf_name.to_vec()).unwrap();
+    let mut hasher = sha3::Keccak256::new();
+    hasher.update(selector.as_bytes());
+    let selector_hash: [u8; 32] = hasher.finalize().into();
+
+    // Derived address that will be the token mint.
+    let (token_mint_id, _) = Pubkey::find_program_address(&[&selector_hash[..]], &gateway::id());
+
+    // Build and sign transaction.
+    let mut tx = Transaction::new_with_payer(
+        &[create_associated_token_account(
+            &payer.pubkey(),
+            &payer.pubkey(),
+            &token_mint_id,
+        )],
+        Some(&payer.pubkey()),
+    );
+    tx.sign(&[&payer], recent_blockhash);
+
+    // Broadcast transaction.
+    let signature = rpc_client
+        .send_transaction_with_config(
+            &tx,
+            RpcSendTransactionConfig {
+                preflight_commitment: Some(commitment_config.commitment),
+                ..RpcSendTransactionConfig::default()
+            },
+        )
+        .unwrap();
+
+    CString::new(signature.to_string()).unwrap().into_raw()
+}
+
+#[no_mangle]
+pub extern "C" fn gateway_get_burn_count(rpc_url: *const libc::c_char) -> libc::c_ulonglong {
+    // Initialize client.
+    let buf_name = unsafe { CStr::from_ptr(rpc_url).to_bytes() };
+    let rpc_url = String::from_utf8(buf_name.to_vec()).unwrap();
+    let rpc_client = RpcClient::new(rpc_url);
+
+    // Fetch account data.
+    let (gateway_account_id, _) = Pubkey::find_program_address(&[b"GatewayState"], &gateway::id());
+    let gateway_account_data = rpc_client.get_account_data(&gateway_account_id).unwrap();
+    let gateway_state = Gateway::unpack_unchecked(&gateway_account_data).unwrap();
+
+    gateway_state.burn_count + 1
+}
+
+#[no_mangle]
+pub extern "C" fn gateway_mint(
+    keypair_path: *const libc::c_char,
+    rpc_url: *const libc::c_char,
+    authority_secret: *const libc::c_char,
+    selector: *const libc::c_char,
+    amount: libc::c_ulonglong,
+) -> *const libc::c_char {
+    // Solana default signer and fee payer.
+    let buf_name = unsafe { CStr::from_ptr(keypair_path).to_bytes() };
+    let keypair_path = String::from_utf8(buf_name.to_vec()).unwrap();
+    let payer = read_keypair_file(&keypair_path).unwrap();
+
+    // RenVM authority secret.
+    let buf_name = unsafe { CStr::from_ptr(authority_secret).to_bytes() };
+    let authority_secret = String::from_utf8(buf_name.to_vec()).unwrap();
+    let renvm = RenVM::from_str(&authority_secret).unwrap();
+    let renvm_authority = renvm.address();
+
+    // Initialize client.
+    let buf_name = unsafe { CStr::from_ptr(rpc_url).to_bytes() };
+    let rpc_url = String::from_utf8(buf_name.to_vec()).unwrap();
+    let rpc_client = RpcClient::new(rpc_url);
+    let commitment_config = CommitmentConfig::confirmed();
+    let (recent_blockhash, _, _) = rpc_client
+        .get_recent_blockhash_with_commitment(commitment_config)
+        .unwrap()
+        .value;
+
+    // Get selector hash.
+    let buf_name = unsafe { CStr::from_ptr(selector).to_bytes() };
+    let selector = String::from_utf8(buf_name.to_vec()).unwrap();
+    let mut hasher = sha3::Keccak256::new();
+    hasher.update(selector.as_bytes());
+    let selector_hash: [u8; 32] = hasher.finalize().into();
+
+    // Derived address that will be the token mint.
+    let (gateway_account_id, _) = Pubkey::find_program_address(&[b"GatewayState"], &gateway::id());
+    let (token_mint_id, _) = Pubkey::find_program_address(&[&selector_hash[..]], &gateway::id());
+    let (mint_authority_id, _) =
+        Pubkey::find_program_address(&[&token_mint_id.to_bytes()], &gateway::id());
+    let associated_token_account = get_associated_token_address(&payer.pubkey(), &token_mint_id);
+
+    // Construct RenVM mint message and sign it.
+    let renvm_mint_msg = RenVmMsgBuilder::default()
+        .amount(amount)
+        .to(associated_token_account.to_bytes())
+        .s_hash(selector_hash)
+        .build()
+        .unwrap();
+    let msg_hash = renvm_mint_msg.get_digest().unwrap();
+    let renvm_sig = renvm.sign(&renvm_mint_msg).unwrap();
+    let (sig_r, sig_s, sig_v) = array_refs![&renvm_sig, 32, 32, 1];
+    let (mint_log_account_id, _) = Pubkey::find_program_address(&[&msg_hash[..]], &gateway::id());
+    let mut tx = Transaction::new_with_payer(
+        &[
+            mint(
+                &gateway::id(),
+                &payer.pubkey(),
+                &gateway_account_id,
+                &token_mint_id,
+                &associated_token_account,
+                &mint_log_account_id,
+                &mint_authority_id,
+                &spl_token::id(),
+            )
+            .unwrap(),
+            util::mint_secp_instruction(
+                sig_r,
+                sig_s,
+                u8::from_le_bytes(*sig_v),
+                &util::encode_msg(
+                    renvm_mint_msg.amount,
+                    &renvm_mint_msg.s_hash,
+                    &renvm_mint_msg.to,
+                    &renvm_mint_msg.p_hash,
+                    &renvm_mint_msg.n_hash,
+                ),
+                renvm_authority[..].to_vec(),
+            ),
+        ],
+        Some(&payer.pubkey()),
+    );
+    tx.sign(&[&payer], recent_blockhash);
+
+    // Broadcast transaction.
+    let signature = rpc_client
+        .send_transaction_with_config(
+            &tx,
+            RpcSendTransactionConfig {
+                preflight_commitment: Some(commitment_config.commitment),
+                ..RpcSendTransactionConfig::default()
+            },
+        )
+        .unwrap();
+
+    CString::new(signature.to_string()).unwrap().into_raw()
+}
+
+#[no_mangle]
+pub extern "C" fn gateway_burn(
+    keypair_path: *const libc::c_char,
+    rpc_url: *const libc::c_char,
+    selector: *const libc::c_char,
+    burn_count: libc::c_ulonglong,
+    burn_amount: libc::c_ulonglong,
+    recipient_len: libc::size_t,
+    recipient_pointer: *const u8,
+) -> *const libc::c_char {
+    // Solana default signer and fee payer.
+    let buf_name = unsafe { CStr::from_ptr(keypair_path).to_bytes() };
+    let keypair_path = String::from_utf8(buf_name.to_vec()).unwrap();
+    let payer = read_keypair_file(&keypair_path).unwrap();
+
+    // Initialize client.
+    let buf_name = unsafe { CStr::from_ptr(rpc_url).to_bytes() };
+    let rpc_url = String::from_utf8(buf_name.to_vec()).unwrap();
+    let rpc_client = RpcClient::new(rpc_url);
+    let commitment_config = CommitmentConfig::confirmed();
+    let (recent_blockhash, _, _) = rpc_client
+        .get_recent_blockhash_with_commitment(commitment_config)
+        .unwrap()
+        .value;
+
+    // Get selector hash.
+    let buf_name = unsafe { CStr::from_ptr(selector).to_bytes() };
+    let selector = String::from_utf8(buf_name.to_vec()).unwrap();
+    let mut hasher = sha3::Keccak256::new();
+    hasher.update(selector.as_bytes());
+    let selector_hash: [u8; 32] = hasher.finalize().into();
+
+    // Derived address that will be the token mint.
+    let (gateway_account_id, _) = Pubkey::find_program_address(&[b"GatewayState"], &gateway::id());
+    let (token_mint_id, _) = Pubkey::find_program_address(&[&selector_hash[..]], &gateway::id());
+    let associated_token_account = get_associated_token_address(&payer.pubkey(), &token_mint_id);
+
+    // Construct the 25-bytes address of release recipient of the underlying assets.
+    let recipient_slice = unsafe {
+        std::slice::from_raw_parts(recipient_pointer as *const u8, recipient_len as usize)
+    };
+
+    let (burn_log_account_id, _) =
+        Pubkey::find_program_address(&[&burn_count.to_le_bytes()[..]], &gateway::id());
+    let mut tx = Transaction::new_with_payer(
+        &[
+            burn_checked(
+                &spl_token::id(),
+                &associated_token_account,
+                &token_mint_id,
+                &payer.pubkey(),
+                &[],
+                burn_amount,
+                9u8,
+            )
+            .unwrap(),
+            burn(
+                &gateway::id(),
+                &payer.pubkey(),
+                &associated_token_account,
+                &gateway_account_id,
+                &token_mint_id,
+                &burn_log_account_id,
+                recipient_slice.to_vec(),
+            )
+            .unwrap(),
+        ],
+        Some(&payer.pubkey()),
+    );
+    tx.sign(&[&payer], recent_blockhash);
+
+    // Broadcast transaction.
+    let signature = rpc_client
+        .send_transaction_with_config(
+            &tx,
+            RpcSendTransactionConfig {
+                preflight_commitment: Some(commitment_config.commitment),
+                ..RpcSendTransactionConfig::default()
+            },
+        )
+        .unwrap();
+
+    CString::new(signature.to_string()).unwrap().into_raw()
+}
diff --git a/rust/src/util.rs b/rust/src/util.rs
new file mode 100644
index 0000000..c80202a
--- /dev/null
+++ b/rust/src/util.rs
@@ -0,0 +1,95 @@
+use gateway::types::{
+    RenVmMintMessage, Secp256k1InstructionData, RENVM_MINT_MESSAGE_SIZE, RENVM_MINT_SECP_DATA_SIZE,
+};
+use solana_sdk::{
+    instruction::Instruction,
+    program_pack::Pack,
+    secp256k1_instruction::{
+        SecpSignatureOffsets, HASHED_PUBKEY_SERIALIZED_SIZE, SIGNATURE_OFFSETS_SERIALIZED_SIZE,
+    },
+};
+
+/// Constructs a Secp256k1 instruction for RenVM mint to be verified by Solana Secp256k1 program.
+pub fn mint_secp_instruction(
+    sig_r: &[u8; 32],
+    sig_s: &[u8; 32],
+    sig_v: u8,
+    message_arr: &[u8],
+    eth_addr: Vec<u8>,
+) -> Instruction {
+    // Assert that the data we've received is of the correct size.
+    assert_eq!(message_arr.len(), RENVM_MINT_MESSAGE_SIZE);
+    assert_eq!(
+        eth_addr.len() + sig_r.len() + sig_s.len() + 1 + message_arr.len(),
+        RENVM_MINT_SECP_DATA_SIZE - 1,
+    );
+
+    // Allocate appropriate size for our instruction data.
+    let mut instruction_data = vec![];
+    let data_start = 1 + SIGNATURE_OFFSETS_SERIALIZED_SIZE;
+    let total_size = data_start + RENVM_MINT_SECP_DATA_SIZE;
+    instruction_data.resize(total_size, 0);
+
+    // Calculate the offsets for a single ECDSA signature.
+    let num_signatures = 1;
+    instruction_data[0] = num_signatures;
+    let eth_addr_offset = data_start + 1;
+    let signature_offset = eth_addr_offset + eth_addr.len();
+    let message_data_offset = signature_offset + sig_r.len() + sig_s.len() + 1;
+
+    // Copy data from slice into sized arrays.
+    let mut addr = [0u8; HASHED_PUBKEY_SERIALIZED_SIZE];
+    addr.copy_from_slice(&eth_addr[..]);
+    let mut msg = [0u8; RENVM_MINT_MESSAGE_SIZE];
+    msg.copy_from_slice(message_arr);
+
+    // Write Secp256k1InstructionData data.
+    let secp256k1_instruction_data = Secp256k1InstructionData::MintSignature {
+        eth_addr: addr,
+        sig_r: *sig_r,
+        sig_s: *sig_s,
+        sig_v: sig_v - 27,
+        msg: msg,
+    };
+    let packed_data = secp256k1_instruction_data.pack();
+    instruction_data[data_start..total_size].copy_from_slice(packed_data.as_slice());
+
+    // Write offsets data.
+    let offsets = SecpSignatureOffsets {
+        signature_offset: signature_offset as u16,
+        signature_instruction_index: 1,
+        eth_address_offset: eth_addr_offset as u16,
+        eth_address_instruction_index: 1,
+        message_data_offset: message_data_offset as u16,
+        message_data_size: message_arr.len() as u16,
+        message_instruction_index: 1,
+    };
+    let writer = std::io::Cursor::new(&mut instruction_data[1..data_start]);
+    bincode::serialize_into(writer, &offsets).unwrap();
+
+    Instruction {
+        program_id: solana_sdk::secp256k1_program::id(),
+        accounts: vec![],
+        data: instruction_data,
+    }
+}
+
+/// ABI-encode the values for creating the signature hash.
+pub fn encode_msg(
+    amount: u64,
+    shash: &[u8; 32],
+    to: &[u8; 32],
+    p_hash: &[u8; 32],
+    n_hash: &[u8; 32],
+) -> Vec<u8> {
+    let mut encoded_msg = vec![0u8; RENVM_MINT_MESSAGE_SIZE];
+    let msg = RenVmMintMessage {
+        p_hash: *p_hash,
+        amount: amount,
+        selector_hash: *shash,
+        to: *to,
+        n_hash: *n_hash,
+    };
+    msg.pack_into_slice(encoded_msg.as_mut_slice());
+    encoded_msg
+}
diff --git a/solana-ffi.yml b/solana-ffi.yml
new file mode 100644
index 0000000..832e7d8
--- /dev/null
+++ b/solana-ffi.yml
@@ -0,0 +1,53 @@
+---
+GENERATOR:
+  PackageName: cgo
+  PackageDescription:
+  PackageLicense:
+  Options:
+    SafeStrings: true
+  Includes:
+    - solana-ffi.h
+  FlagGroups:
+    - {name: "LDFLAGS", flags: [
+        "-L${SRCDIR}",
+        "-lsolana_ffi",
+    ]}
+    - {name: "linux LDFLAGS", flags: [
+        "-lcrypto",
+        "-ldl",
+        "-lm",
+        "-lrt",
+        "-lssl",
+        "-ludev",
+    ]}
+    - {name: "darwin LDFLAGS", flags: [
+        "-F/Library/Frameworks",
+        "-framework Security",
+        "-framework CoreServices",
+        "-framework IOKit",
+        "-framework IOSurface",
+        "-framework AppKit",
+    ]}
+
+PARSER:
+  Defines:
+  IncludePaths:
+    - /usr/include
+  SourcesPaths:
+    - ./cgo/solana-ffi.h
+
+TRANSLATOR:
+  Rules:
+    function:
+      - {action: accept, from: "unique_pubkey"}
+      - {action: accept, from: "program_derived_address"}
+      - {action: accept, from: "gateway_initialize"}
+      - {action: accept, from: "gateway_initialize_account"}
+      - {action: accept, from: "gateway_get_burn_count"}
+      - {action: accept, from: "gateway_mint"}
+      - {action: accept, from: "gateway_burn"}
+    private:
+      - {transform: unexport}
+    post-global:
+      - {transform: export}
+      - {load: snakecase}