Payload exploration

Cargo.toml

@@ -17,7 +17,8 @@ members = [
     "single_offer_router",
     "events",
     "timelock",
-    "token"
+    "token",
+    "token_with_payload"
 ]
 
 [profile.release]
@@ -35,10 +36,10 @@ soroban-sdk = { git = "https://github.com/stellar/rs-soroban-sdk", rev = "3b2994
 soroban-spec = { git = "https://github.com/stellar/rs-soroban-sdk", rev = "3b299468" }
 soroban-auth = { git = "https://github.com/stellar/rs-soroban-sdk", rev = "3b299468" }
 soroban-sdk-macros = { git = "https://github.com/stellar/rs-soroban-sdk", rev = "3b299468" }
-soroban-env-common = { git = "https://github.com/stellar/rs-soroban-env", rev = "a51888cf" }
-soroban-env-guest = { git = "https://github.com/stellar/rs-soroban-env", rev = "a51888cf" }
-soroban-env-host = { git = "https://github.com/stellar/rs-soroban-env", rev = "a51888cf" }
-soroban-env-macros = { git = "https://github.com/stellar/rs-soroban-env", rev = "a51888cf" }
-soroban-native-sdk-macros = { git = "https://github.com/stellar/rs-soroban-env", rev = "a51888cf" }
+soroban-env-common = { git = "https://github.com/stellar/rs-soroban-env", rev = "5d57d88" }
+soroban-env-guest = { git = "https://github.com/stellar/rs-soroban-env", rev = "5d57d88" }
+soroban-env-host = { git = "https://github.com/stellar/rs-soroban-env", rev = "5d57d88" }
+soroban-env-macros = { git = "https://github.com/stellar/rs-soroban-env", rev = "5d57d88" }
+soroban-native-sdk-macros = { git = "https://github.com/stellar/rs-soroban-env", rev = "5d57d88" }
 stellar-xdr = { git = "https://github.com/stellar/rs-stellar-xdr", rev = "469efc9" }
 wasmi = { package = "soroban-wasmi", git = "https://github.com/stellar/wasmi", rev = "a61b6df" }

token_with_payload/Cargo.toml

@@ -0,0 +1,25 @@
+[package]
+name = "soroban-token-with-payload"
+description = "Soroban token with payloads"
+version = "0.0.4"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "rlib"]
+
+[features]
+default = ["export"]
+export = []
+testutils = ["soroban-sdk/testutils", "soroban-auth/testutils", "dep:ed25519-dalek"]
+
+[dependencies]
+ed25519-dalek = { version = "1.0.1", optional = true }
+num-bigint = { version = "0.4", optional = true }
+soroban-sdk = { version = "0.0.4" }
+soroban-auth = { version = "0.0.4" }
+
+[dev-dependencies]
+soroban-sdk = { version = "0.0.4", features = ["testutils"] }
+soroban-auth = { version = "0.0.4", features = ["testutils"] }
+ed25519-dalek = { version = "1.0.1" }
+rand = { version = "0.7.3" }

token_with_payload/src/admin.rs

@@ -0,0 +1,25 @@
+use crate::storage_types::DataKey;
+use soroban_auth::{Identifier, Signature};
+use soroban_sdk::Env;
+
+pub fn has_administrator(e: &Env) -> bool {
+    let key = DataKey::Admin;
+    e.contract_data().has(key)
+}
+
+fn read_administrator(e: &Env) -> Identifier {
+    let key = DataKey::Admin;
+    e.contract_data().get_unchecked(key).unwrap()
+}
+
+pub fn write_administrator(e: &Env, id: Identifier) {
+    let key = DataKey::Admin;
+    e.contract_data().set(key, id);
+}
+
+pub fn check_admin(e: &Env, auth: &Signature) {
+    let auth_id = auth.get_identifier(&e);
+    if auth_id != read_administrator(&e) {
+        panic!("not authorized by admin")
+    }
+}

token_with_payload/src/allowance.rs

@@ -0,0 +1,25 @@
+use crate::storage_types::{AllowanceDataKey, DataKey};
+use soroban_auth::Identifier;
+use soroban_sdk::{BigInt, Env};
+
+pub fn read_allowance(e: &Env, from: Identifier, spender: Identifier) -> BigInt {
+    let key = DataKey::Allowance(AllowanceDataKey { from, spender });
+    if let Some(allowance) = e.contract_data().get(key) {
+        allowance.unwrap()
+    } else {
+        BigInt::zero(e)
+    }
+}
+
+pub fn write_allowance(e: &Env, from: Identifier, spender: Identifier, amount: BigInt) {
+    let key = DataKey::Allowance(AllowanceDataKey { from, spender });
+    e.contract_data().set(key, amount);
+}
+
+pub fn spend_allowance(e: &Env, from: Identifier, spender: Identifier, amount: BigInt) {
+    let allowance = read_allowance(e, from.clone(), spender.clone());
+    if allowance < amount {
+        panic!("insufficient allowance");
+    }
+    write_allowance(e, from, spender, allowance - amount);
+}