[feat] add soroban chain

Cargo.toml

@@ -49,7 +49,15 @@ serde_bytes = "0.11.19"
 serde_with = { version = "3.17.0", features = ["hex"] }
 p256 = { version = "0.13", features = ["ecdsa"] }
 ecdsa = "0.16.9"
+ed25519-dalek = "2"
 elliptic-curve = "0.13.8"
+bip39 = "2"
+hmac = "0.12"
+sha2 = "0.10"
+stellar-strkey = "0.0.16"
+stellar-xdr = { version = "26.0.0", features = ["curr", "base64"] }
+reqwest = { version = "0.12", default-features = false, features = ["json", "rustls-tls"] }
+base32 = "0.5.1"
 
 [build-dependencies]
 tonic-build = { version = "0.13.1", features = ["prost"] }

proto/fkms/v1/signer.proto

@@ -7,6 +7,7 @@ service FkmsService {
   rpc SignXrpl(SignXrplRequest) returns (SignXrplResponse);
   rpc SignIcon(SignIconRequest) returns (SignIconResponse);
   rpc SignFlow(SignFlowRequest) returns (SignFlowResponse);
+  rpc SignSoroban(SignSorobanRequest) returns (SignSorobanResponse);
   rpc GetSignerAddresses(GetSignerAddressesRequest) returns (GetSignerAddressesResponse);
 }
 
@@ -46,6 +47,16 @@ message SignFlowResponse {
   bytes tx_blob = 1;
 }
 
+message SignSorobanRequest {
+  SorobanSignerPayload signer_payload = 1;
+  Tss tss = 2;
+}
+
+message SignSorobanResponse {
+  // Soroban transaction envelope in base64 format
+  string tx_blob = 1;
+}
+
 message GetSignerAddressesRequest {}
 
 message GetSignerAddressesResponse {
@@ -75,6 +86,15 @@ message FlowSignerPayload {
   bytes script = 6;
 }
 
+message SorobanSignerPayload {
+  string source_account = 1;
+  string contract_address = 2;
+  string fee = 3;
+  int64 sequence = 4;
+  string network_passphrase = 5;
+  repeated string rpc_urls = 6;
+}
+
 message Tss {
   bytes message = 1;
   bytes random_addr = 2;
@@ -91,4 +111,5 @@ enum ChainType {
   XRPL = 1;
   ICON = 2;
   FLOW = 3;
+  SOROBAN = 4;
 }

src/codec.rs

@@ -1,5 +1,6 @@
 pub mod evm;
 pub mod flow;
 pub mod icon;
+pub mod soroban;
 pub mod tss;
 pub mod xrpl;