Trait Env

pub trait Env: EnvBase {
    // Required methods
    fn log_from_linear_memory(
        &self,
        msg_pos: U32Val,
        msg_len: U32Val,
        vals_pos: U32Val,
        vals_len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn obj_cmp(&self, a: Val, b: Val) -> Result<i64, Self::Error>;
    fn contract_event(
        &self,
        topics: VecObject,
        data: Val,
    ) -> Result<Void, Self::Error>;
    fn get_ledger_version(&self) -> Result<U32Val, Self::Error>;
    fn get_ledger_sequence(&self) -> Result<U32Val, Self::Error>;
    fn get_ledger_timestamp(&self) -> Result<U64Val, Self::Error>;
    fn fail_with_error(&self, error: Error) -> Result<Void, Self::Error>;
    fn get_ledger_network_id(&self) -> Result<BytesObject, Self::Error>;
    fn get_current_contract_address(&self) -> Result<AddressObject, Self::Error>;
    fn get_max_live_until_ledger(&self) -> Result<U32Val, Self::Error>;
    fn obj_from_u64(&self, v: u64) -> Result<U64Object, Self::Error>;
    fn obj_to_u64(&self, obj: U64Object) -> Result<u64, Self::Error>;
    fn obj_from_i64(&self, v: i64) -> Result<I64Object, Self::Error>;
    fn obj_to_i64(&self, obj: I64Object) -> Result<i64, Self::Error>;
    fn obj_from_u128_pieces(
        &self,
        hi: u64,
        lo: u64,
    ) -> Result<U128Object, Self::Error>;
    fn obj_to_u128_lo64(&self, obj: U128Object) -> Result<u64, Self::Error>;
    fn obj_to_u128_hi64(&self, obj: U128Object) -> Result<u64, Self::Error>;
    fn obj_from_i128_pieces(
        &self,
        hi: i64,
        lo: u64,
    ) -> Result<I128Object, Self::Error>;
    fn obj_to_i128_lo64(&self, obj: I128Object) -> Result<u64, Self::Error>;
    fn obj_to_i128_hi64(&self, obj: I128Object) -> Result<i64, Self::Error>;
    fn obj_from_u256_pieces(
        &self,
        hi_hi: u64,
        hi_lo: u64,
        lo_hi: u64,
        lo_lo: u64,
    ) -> Result<U256Object, Self::Error>;
    fn u256_val_from_be_bytes(
        &self,
        bytes: BytesObject,
    ) -> Result<U256Val, Self::Error>;
    fn u256_val_to_be_bytes(
        &self,
        val: U256Val,
    ) -> Result<BytesObject, Self::Error>;
    fn obj_to_u256_hi_hi(&self, obj: U256Object) -> Result<u64, Self::Error>;
    fn obj_to_u256_hi_lo(&self, obj: U256Object) -> Result<u64, Self::Error>;
    fn obj_to_u256_lo_hi(&self, obj: U256Object) -> Result<u64, Self::Error>;
    fn obj_to_u256_lo_lo(&self, obj: U256Object) -> Result<u64, Self::Error>;
    fn obj_from_i256_pieces(
        &self,
        hi_hi: i64,
        hi_lo: u64,
        lo_hi: u64,
        lo_lo: u64,
    ) -> Result<I256Object, Self::Error>;
    fn i256_val_from_be_bytes(
        &self,
        bytes: BytesObject,
    ) -> Result<I256Val, Self::Error>;
    fn i256_val_to_be_bytes(
        &self,
        val: I256Val,
    ) -> Result<BytesObject, Self::Error>;
    fn obj_to_i256_hi_hi(&self, obj: I256Object) -> Result<i64, Self::Error>;
    fn obj_to_i256_hi_lo(&self, obj: I256Object) -> Result<u64, Self::Error>;
    fn obj_to_i256_lo_hi(&self, obj: I256Object) -> Result<u64, Self::Error>;
    fn obj_to_i256_lo_lo(&self, obj: I256Object) -> Result<u64, Self::Error>;
    fn u256_add(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_sub(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_mul(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_div(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_rem_euclid(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_pow(
        &self,
        lhs: U256Val,
        rhs: U32Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_shl(
        &self,
        lhs: U256Val,
        rhs: U32Val,
    ) -> Result<U256Val, Self::Error>;
    fn u256_shr(
        &self,
        lhs: U256Val,
        rhs: U32Val,
    ) -> Result<U256Val, Self::Error>;
    fn i256_add(
        &self,
        lhs: I256Val,
        rhs: I256Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_sub(
        &self,
        lhs: I256Val,
        rhs: I256Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_mul(
        &self,
        lhs: I256Val,
        rhs: I256Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_div(
        &self,
        lhs: I256Val,
        rhs: I256Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_rem_euclid(
        &self,
        lhs: I256Val,
        rhs: I256Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_pow(
        &self,
        lhs: I256Val,
        rhs: U32Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_shl(
        &self,
        lhs: I256Val,
        rhs: U32Val,
    ) -> Result<I256Val, Self::Error>;
    fn i256_shr(
        &self,
        lhs: I256Val,
        rhs: U32Val,
    ) -> Result<I256Val, Self::Error>;
    fn timepoint_obj_from_u64(
        &self,
        v: u64,
    ) -> Result<TimepointObject, Self::Error>;
    fn timepoint_obj_to_u64(
        &self,
        obj: TimepointObject,
    ) -> Result<u64, Self::Error>;
    fn duration_obj_from_u64(
        &self,
        v: u64,
    ) -> Result<DurationObject, Self::Error>;
    fn duration_obj_to_u64(
        &self,
        obj: DurationObject,
    ) -> Result<u64, Self::Error>;
    fn map_new(&self) -> Result<MapObject, Self::Error>;
    fn map_put(
        &self,
        m: MapObject,
        k: Val,
        v: Val,
    ) -> Result<MapObject, Self::Error>;
    fn map_get(&self, m: MapObject, k: Val) -> Result<Val, Self::Error>;
    fn map_del(&self, m: MapObject, k: Val) -> Result<MapObject, Self::Error>;
    fn map_len(&self, m: MapObject) -> Result<U32Val, Self::Error>;
    fn map_has(&self, m: MapObject, k: Val) -> Result<Bool, Self::Error>;
    fn map_key_by_pos(
        &self,
        m: MapObject,
        i: U32Val,
    ) -> Result<Val, Self::Error>;
    fn map_val_by_pos(
        &self,
        m: MapObject,
        i: U32Val,
    ) -> Result<Val, Self::Error>;
    fn map_keys(&self, m: MapObject) -> Result<VecObject, Self::Error>;
    fn map_values(&self, m: MapObject) -> Result<VecObject, Self::Error>;
    fn map_new_from_linear_memory(
        &self,
        keys_pos: U32Val,
        vals_pos: U32Val,
        len: U32Val,
    ) -> Result<MapObject, Self::Error>;
    fn map_unpack_to_linear_memory(
        &self,
        map: MapObject,
        keys_pos: U32Val,
        vals_pos: U32Val,
        len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn vec_new(&self) -> Result<VecObject, Self::Error>;
    fn vec_put(
        &self,
        v: VecObject,
        i: U32Val,
        x: Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_get(&self, v: VecObject, i: U32Val) -> Result<Val, Self::Error>;
    fn vec_del(&self, v: VecObject, i: U32Val) -> Result<VecObject, Self::Error>;
    fn vec_len(&self, v: VecObject) -> Result<U32Val, Self::Error>;
    fn vec_push_front(
        &self,
        v: VecObject,
        x: Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_pop_front(&self, v: VecObject) -> Result<VecObject, Self::Error>;
    fn vec_push_back(
        &self,
        v: VecObject,
        x: Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_pop_back(&self, v: VecObject) -> Result<VecObject, Self::Error>;
    fn vec_front(&self, v: VecObject) -> Result<Val, Self::Error>;
    fn vec_back(&self, v: VecObject) -> Result<Val, Self::Error>;
    fn vec_insert(
        &self,
        v: VecObject,
        i: U32Val,
        x: Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_append(
        &self,
        v1: VecObject,
        v2: VecObject,
    ) -> Result<VecObject, Self::Error>;
    fn vec_slice(
        &self,
        v: VecObject,
        start: U32Val,
        end: U32Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_first_index_of(
        &self,
        v: VecObject,
        x: Val,
    ) -> Result<Val, Self::Error>;
    fn vec_last_index_of(
        &self,
        v: VecObject,
        x: Val,
    ) -> Result<Val, Self::Error>;
    fn vec_binary_search(
        &self,
        v: VecObject,
        x: Val,
    ) -> Result<u64, Self::Error>;
    fn vec_new_from_linear_memory(
        &self,
        vals_pos: U32Val,
        len: U32Val,
    ) -> Result<VecObject, Self::Error>;
    fn vec_unpack_to_linear_memory(
        &self,
        vec: VecObject,
        vals_pos: U32Val,
        len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn put_contract_data(
        &self,
        k: Val,
        v: Val,
        t: StorageType,
    ) -> Result<Void, Self::Error>;
    fn has_contract_data(
        &self,
        k: Val,
        t: StorageType,
    ) -> Result<Bool, Self::Error>;
    fn get_contract_data(
        &self,
        k: Val,
        t: StorageType,
    ) -> Result<Val, Self::Error>;
    fn del_contract_data(
        &self,
        k: Val,
        t: StorageType,
    ) -> Result<Void, Self::Error>;
    fn create_contract(
        &self,
        deployer: AddressObject,
        wasm_hash: BytesObject,
        salt: BytesObject,
    ) -> Result<AddressObject, Self::Error>;
    fn create_asset_contract(
        &self,
        serialized_asset: BytesObject,
    ) -> Result<AddressObject, Self::Error>;
    fn upload_wasm(&self, wasm: BytesObject) -> Result<BytesObject, Self::Error>;
    fn update_current_contract_wasm(
        &self,
        hash: BytesObject,
    ) -> Result<Void, Self::Error>;
    fn extend_contract_data_ttl(
        &self,
        k: Val,
        t: StorageType,
        threshold: U32Val,
        extend_to: U32Val,
    ) -> Result<Void, Self::Error>;
    fn extend_current_contract_instance_and_code_ttl(
        &self,
        threshold: U32Val,
        extend_to: U32Val,
    ) -> Result<Void, Self::Error>;
    fn extend_contract_instance_and_code_ttl(
        &self,
        contract: AddressObject,
        threshold: U32Val,
        extend_to: U32Val,
    ) -> Result<Void, Self::Error>;
    fn get_contract_id(
        &self,
        deployer: AddressObject,
        salt: BytesObject,
    ) -> Result<AddressObject, Self::Error>;
    fn get_asset_contract_id(
        &self,
        serialized_asset: BytesObject,
    ) -> Result<AddressObject, Self::Error>;
    fn extend_contract_instance_ttl(
        &self,
        contract: AddressObject,
        threshold: U32Val,
        extend_to: U32Val,
    ) -> Result<Void, Self::Error>;
    fn extend_contract_code_ttl(
        &self,
        contract: AddressObject,
        threshold: U32Val,
        extend_to: U32Val,
    ) -> Result<Void, Self::Error>;
    fn create_contract_with_constructor(
        &self,
        deployer: AddressObject,
        wasm_hash: BytesObject,
        salt: BytesObject,
        constructor_args: VecObject,
    ) -> Result<AddressObject, Self::Error>;
    fn call(
        &self,
        contract: AddressObject,
        func: Symbol,
        args: VecObject,
    ) -> Result<Val, Self::Error>;
    fn try_call(
        &self,
        contract: AddressObject,
        func: Symbol,
        args: VecObject,
    ) -> Result<Val, Self::Error>;
    fn serialize_to_bytes(&self, v: Val) -> Result<BytesObject, Self::Error>;
    fn deserialize_from_bytes(&self, b: BytesObject) -> Result<Val, Self::Error>;
    fn bytes_copy_to_linear_memory(
        &self,
        b: BytesObject,
        b_pos: U32Val,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn bytes_copy_from_linear_memory(
        &self,
        b: BytesObject,
        b_pos: U32Val,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_new_from_linear_memory(
        &self,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_new(&self) -> Result<BytesObject, Self::Error>;
    fn bytes_put(
        &self,
        b: BytesObject,
        i: U32Val,
        u: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_get(
        &self,
        b: BytesObject,
        i: U32Val,
    ) -> Result<U32Val, Self::Error>;
    fn bytes_del(
        &self,
        b: BytesObject,
        i: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_len(&self, b: BytesObject) -> Result<U32Val, Self::Error>;
    fn bytes_push(
        &self,
        b: BytesObject,
        u: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_pop(&self, b: BytesObject) -> Result<BytesObject, Self::Error>;
    fn bytes_front(&self, b: BytesObject) -> Result<U32Val, Self::Error>;
    fn bytes_back(&self, b: BytesObject) -> Result<U32Val, Self::Error>;
    fn bytes_insert(
        &self,
        b: BytesObject,
        i: U32Val,
        u: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_append(
        &self,
        b1: BytesObject,
        b2: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bytes_slice(
        &self,
        b: BytesObject,
        start: U32Val,
        end: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn string_copy_to_linear_memory(
        &self,
        s: StringObject,
        s_pos: U32Val,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn symbol_copy_to_linear_memory(
        &self,
        s: SymbolObject,
        s_pos: U32Val,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<Void, Self::Error>;
    fn string_new_from_linear_memory(
        &self,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<StringObject, Self::Error>;
    fn symbol_new_from_linear_memory(
        &self,
        lm_pos: U32Val,
        len: U32Val,
    ) -> Result<SymbolObject, Self::Error>;
    fn string_len(&self, s: StringObject) -> Result<U32Val, Self::Error>;
    fn symbol_len(&self, s: SymbolObject) -> Result<U32Val, Self::Error>;
    fn symbol_index_in_linear_memory(
        &self,
        sym: Symbol,
        slices_pos: U32Val,
        len: U32Val,
    ) -> Result<U32Val, Self::Error>;
    fn compute_hash_sha256(
        &self,
        x: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn verify_sig_ed25519(
        &self,
        k: BytesObject,
        x: BytesObject,
        s: BytesObject,
    ) -> Result<Void, Self::Error>;
    fn compute_hash_keccak256(
        &self,
        x: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn recover_key_ecdsa_secp256k1(
        &self,
        msg_digest: BytesObject,
        signature: BytesObject,
        recovery_id: U32Val,
    ) -> Result<BytesObject, Self::Error>;
    fn verify_sig_ecdsa_secp256r1(
        &self,
        public_key: BytesObject,
        msg_digest: BytesObject,
        signature: BytesObject,
    ) -> Result<Void, Self::Error>;
    fn bls12_381_check_g1_is_in_subgroup(
        &self,
        point: BytesObject,
    ) -> Result<Bool, Self::Error>;
    fn bls12_381_g1_add(
        &self,
        point1: BytesObject,
        point2: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_g1_mul(
        &self,
        point: BytesObject,
        scalar: U256Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_g1_msm(
        &self,
        vp: VecObject,
        vs: VecObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_map_fp_to_g1(
        &self,
        fp: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_hash_to_g1(
        &self,
        msg: BytesObject,
        dst: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_check_g2_is_in_subgroup(
        &self,
        point: BytesObject,
    ) -> Result<Bool, Self::Error>;
    fn bls12_381_g2_add(
        &self,
        point1: BytesObject,
        point2: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_g2_mul(
        &self,
        point: BytesObject,
        scalar: U256Val,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_g2_msm(
        &self,
        vp: VecObject,
        vs: VecObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_map_fp2_to_g2(
        &self,
        fp2: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_hash_to_g2(
        &self,
        msg: BytesObject,
        dst: BytesObject,
    ) -> Result<BytesObject, Self::Error>;
    fn bls12_381_multi_pairing_check(
        &self,
        vp1: VecObject,
        vp2: VecObject,
    ) -> Result<Bool, Self::Error>;
    fn bls12_381_fr_add(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn bls12_381_fr_sub(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn bls12_381_fr_mul(
        &self,
        lhs: U256Val,
        rhs: U256Val,
    ) -> Result<U256Val, Self::Error>;
    fn bls12_381_fr_pow(
        &self,
        lhs: U256Val,
        rhs: U64Val,
    ) -> Result<U256Val, Self::Error>;
    fn bls12_381_fr_inv(&self, lhs: U256Val) -> Result<U256Val, Self::Error>;
    fn require_auth_for_args(
        &self,
        address: AddressObject,
        args: VecObject,
    ) -> Result<Void, Self::Error>;
    fn require_auth(&self, address: AddressObject) -> Result<Void, Self::Error>;
    fn strkey_to_address(
        &self,
        strkey: Val,
    ) -> Result<AddressObject, Self::Error>;
    fn address_to_strkey(
        &self,
        address: AddressObject,
    ) -> Result<StringObject, Self::Error>;
    fn authorize_as_curr_contract(
        &self,
        auth_entires: VecObject,
    ) -> Result<Void, Self::Error>;
    fn dummy0(&self) -> Result<Val, Self::Error>;
    fn protocol_gated_dummy(&self) -> Result<Val, Self::Error>;
    fn prng_reseed(&self, seed: BytesObject) -> Result<Void, Self::Error>;
    fn prng_bytes_new(&self, length: U32Val) -> Result<BytesObject, Self::Error>;
    fn prng_u64_in_inclusive_range(
        &self,
        lo: u64,
        hi: u64,
    ) -> Result<u64, Self::Error>;
    fn prng_vec_shuffle(&self, vec: VecObject) -> Result<VecObject, Self::Error>;
}

This trait represents the interface between Host and Guest, used by client contract code and implemented (via Env) by the host. It consists of functions that take or return only 64-bit values such as Val or u64.

Required Methods

fn log_from_linear_memory( &self, msg_pos: U32Val, msg_len: U32Val, vals_pos: U32Val, vals_len: U32Val, ) -> Result<Void, Self::Error>

Emit a diagnostic event containing a message and sequence of Vals.

fn obj_cmp(&self, a: Val, b: Val) -> Result<i64, Self::Error>

Compare two objects, or at least one object to a non-object, structurally. Returns -1 if a<b, 1 if a>b, or 0 if a==b.

fn contract_event( &self, topics: VecObject, data: Val, ) -> Result<Void, Self::Error>

Records a contract event. topics is expected to be a SCVec with length <= 4 that cannot contain Vec, Map, or Bytes with length > 32.

fn get_ledger_version(&self) -> Result<U32Val, Self::Error>

Return the protocol version of the current ledger as a u32.

fn get_ledger_sequence(&self) -> Result<U32Val, Self::Error>

Return the sequence number of the current ledger as a u32.

fn get_ledger_timestamp(&self) -> Result<U64Val, Self::Error>

Return the timestamp number of the current ledger as a u64.

fn fail_with_error(&self, error: Error) -> Result<Void, Self::Error>

Causes the currently executing contract to fail immediately with a provided error code, which must be of error-type ScErrorType::Contract. Does not actually return.

fn get_ledger_network_id(&self) -> Result<BytesObject, Self::Error>

Return the network id (sha256 hash of network passphrase) of the current ledger as Bytes. The value is always 32 bytes in length.

fn get_current_contract_address(&self) -> Result<AddressObject, Self::Error>

Get the Address object for the current contract.

fn get_max_live_until_ledger(&self) -> Result<U32Val, Self::Error>

Returns the max ledger sequence that an entry can live to (inclusive).

fn obj_from_u64(&self, v: u64) -> Result<U64Object, Self::Error>

Convert a u64 to an object containing a u64.

fn obj_to_u64(&self, obj: U64Object) -> Result<u64, Self::Error>

Convert an object containing a u64 to a u64.

fn obj_from_i64(&self, v: i64) -> Result<I64Object, Self::Error>

Convert an i64 to an object containing an i64.

fn obj_to_i64(&self, obj: I64Object) -> Result<i64, Self::Error>

Convert an object containing an i64 to an i64.

fn obj_from_u128_pieces( &self, hi: u64, lo: u64, ) -> Result<U128Object, Self::Error>

Convert the high and low 64-bit words of a u128 to an object containing a u128.

fn obj_to_u128_lo64(&self, obj: U128Object) -> Result<u64, Self::Error>

Extract the low 64 bits from an object containing a u128.

fn obj_to_u128_hi64(&self, obj: U128Object) -> Result<u64, Self::Error>

Extract the high 64 bits from an object containing a u128.

fn obj_from_i128_pieces( &self, hi: i64, lo: u64, ) -> Result<I128Object, Self::Error>

Convert the high and low 64-bit words of an i128 to an object containing an i128.

fn obj_to_i128_lo64(&self, obj: I128Object) -> Result<u64, Self::Error>

Extract the low 64 bits from an object containing an i128.

fn obj_to_i128_hi64(&self, obj: I128Object) -> Result<i64, Self::Error>

Extract the high 64 bits from an object containing an i128.

fn obj_from_u256_pieces( &self, hi_hi: u64, hi_lo: u64, lo_hi: u64, lo_lo: u64, ) -> Result<U256Object, Self::Error>

Convert the four 64-bit words of a u256 (big-endian) to an object containing a u256.

fn u256_val_from_be_bytes( &self, bytes: BytesObject, ) -> Result<U256Val, Self::Error>

Create a U256 Val from its representation as a byte array in big endian.

fn u256_val_to_be_bytes(&self, val: U256Val) -> Result<BytesObject, Self::Error>

Return the memory representation of this U256 Val as a byte array in big endian byte order.

fn obj_to_u256_hi_hi(&self, obj: U256Object) -> Result<u64, Self::Error>

Extract the highest 64-bits (bits 192-255) from an object containing a u256.

fn obj_to_u256_hi_lo(&self, obj: U256Object) -> Result<u64, Self::Error>

Extract bits 128-191 from an object containing a u256.

fn obj_to_u256_lo_hi(&self, obj: U256Object) -> Result<u64, Self::Error>

Extract bits 64-127 from an object containing a u256.

fn obj_to_u256_lo_lo(&self, obj: U256Object) -> Result<u64, Self::Error>

Extract the lowest 64-bits (bits 0-63) from an object containing a u256.

fn obj_from_i256_pieces( &self, hi_hi: i64, hi_lo: u64, lo_hi: u64, lo_lo: u64, ) -> Result<I256Object, Self::Error>

Convert the four 64-bit words of an i256 (big-endian) to an object containing an i256.

fn i256_val_from_be_bytes( &self, bytes: BytesObject, ) -> Result<I256Val, Self::Error>

Create a I256 Val from its representation as a byte array in big endian.

fn i256_val_to_be_bytes(&self, val: I256Val) -> Result<BytesObject, Self::Error>

Return the memory representation of this I256 Val as a byte array in big endian byte order.

fn obj_to_i256_hi_hi(&self, obj: I256Object) -> Result<i64, Self::Error>

Extract the highest 64-bits (bits 192-255) from an object containing an i256.

fn obj_to_i256_hi_lo(&self, obj: I256Object) -> Result<u64, Self::Error>

Extract bits 128-191 from an object containing an i256.

fn obj_to_i256_lo_hi(&self, obj: I256Object) -> Result<u64, Self::Error>

Extract bits 64-127 from an object containing an i256.

fn obj_to_i256_lo_lo(&self, obj: I256Object) -> Result<u64, Self::Error>

Extract the lowest 64-bits (bits 0-63) from an object containing an i256.

fn u256_add(&self, lhs: U256Val, rhs: U256Val) -> Result<U256Val, Self::Error>

Performs checked integer addition. Computes lhs + rhs, returning ScError if overflow occurred.

fn u256_sub(&self, lhs: U256Val, rhs: U256Val) -> Result<U256Val, Self::Error>

Performs checked integer subtraction. Computes lhs - rhs, returning ScError if overflow occurred.

fn u256_mul(&self, lhs: U256Val, rhs: U256Val) -> Result<U256Val, Self::Error>

Performs checked integer multiplication. Computes lhs * rhs, returning ScError if overflow occurred.

fn u256_div(&self, lhs: U256Val, rhs: U256Val) -> Result<U256Val, Self::Error>

Performs checked integer division. Computes lhs / rhs, returning ScError if rhs == 0 or overflow occurred.

fn u256_rem_euclid( &self, lhs: U256Val, rhs: U256Val, ) -> Result<U256Val, Self::Error>

Performs checked Euclidean modulo. Computes lhs % rhs, returning ScError if rhs == 0 or overflow occurred.

fn u256_pow(&self, lhs: U256Val, rhs: U32Val) -> Result<U256Val, Self::Error>

Performs checked exponentiation. Computes lhs.exp(rhs), returning ScError if overflow occurred.

fn u256_shl(&self, lhs: U256Val, rhs: U32Val) -> Result<U256Val, Self::Error>

Performs checked shift left. Computes lhs << rhs, returning ScError if rhs is larger than or equal to the number of bits in lhs.

fn u256_shr(&self, lhs: U256Val, rhs: U32Val) -> Result<U256Val, Self::Error>

Performs checked shift right. Computes lhs >> rhs, returning ScError if rhs is larger than or equal to the number of bits in lhs.

fn i256_add(&self, lhs: I256Val, rhs: I256Val) -> Result<I256Val, Self::Error>

Performs checked integer addition. Computes lhs + rhs, returning ScError if overflow occurred.

fn i256_sub(&self, lhs: I256Val, rhs: I256Val) -> Result<I256Val, Self::Error>

Performs checked integer subtraction. Computes lhs - rhs, returning ScError if overflow occurred.

fn i256_mul(&self, lhs: I256Val, rhs: I256Val) -> Result<I256Val, Self::Error>

Performs checked integer multiplication. Computes lhs * rhs, returning ScError if overflow occurred.

fn i256_div(&self, lhs: I256Val, rhs: I256Val) -> Result<I256Val, Self::Error>

Performs checked integer division. Computes lhs / rhs, returning ScError if rhs == 0 or overflow occurred.

fn i256_rem_euclid( &self, lhs: I256Val, rhs: I256Val, ) -> Result<I256Val, Self::Error>

Performs checked Euclidean modulo. Computes lhs % rhs, returning ScError if rhs == 0 or overflow occurred.

fn i256_pow(&self, lhs: I256Val, rhs: U32Val) -> Result<I256Val, Self::Error>

Performs checked exponentiation. Computes lhs.exp(rhs), returning ScError if overflow occurred.

fn i256_shl(&self, lhs: I256Val, rhs: U32Val) -> Result<I256Val, Self::Error>

Performs checked shift left. Computes lhs << rhs, returning ScError if rhs is larger than or equal to the number of bits in lhs.

fn i256_shr(&self, lhs: I256Val, rhs: U32Val) -> Result<I256Val, Self::Error>

Performs checked shift right. Computes lhs >> rhs, returning ScError if rhs is larger than or equal to the number of bits in lhs.

fn timepoint_obj_from_u64(&self, v: u64) -> Result<TimepointObject, Self::Error>

Convert a u64 to a Timepoint object.

fn timepoint_obj_to_u64(&self, obj: TimepointObject) -> Result<u64, Self::Error>

Convert a Timepoint object to a u64.

fn duration_obj_from_u64(&self, v: u64) -> Result<DurationObject, Self::Error>

Convert a u64 to a Duration object.

fn duration_obj_to_u64(&self, obj: DurationObject) -> Result<u64, Self::Error>

Convert a Duration object a u64.

fn map_new(&self) -> Result<MapObject, Self::Error>

Create an empty new map.

fn map_put( &self, m: MapObject, k: Val, v: Val, ) -> Result<MapObject, Self::Error>

Insert a key/value mapping into an existing map, and return the map object handle. If the map already has a mapping for the given key, the previous value is overwritten.

fn map_get(&self, m: MapObject, k: Val) -> Result<Val, Self::Error>

Get the value for a key from a map. Traps if key is not found.

fn map_del(&self, m: MapObject, k: Val) -> Result<MapObject, Self::Error>

Remove a key/value mapping from a map if it exists, traps if doesn’t.

fn map_len(&self, m: MapObject) -> Result<U32Val, Self::Error>

Get the size of a map.

fn map_has(&self, m: MapObject, k: Val) -> Result<Bool, Self::Error>

Test for the presence of a key in a map. Returns Bool.

fn map_key_by_pos(&self, m: MapObject, i: U32Val) -> Result<Val, Self::Error>

Get the key from a map at position i. If i is an invalid position, return ScError.

fn map_val_by_pos(&self, m: MapObject, i: U32Val) -> Result<Val, Self::Error>

Get the value from a map at position i. If i is an invalid position, return ScError.

fn map_keys(&self, m: MapObject) -> Result<VecObject, Self::Error>

Return a new vector containing all the keys in a map. The new vector is ordered in the original map’s key-sorted order.

fn map_values(&self, m: MapObject) -> Result<VecObject, Self::Error>

Return a new vector containing all the values in a map. The new vector is ordered in the original map’s key-sorted order.

fn map_new_from_linear_memory( &self, keys_pos: U32Val, vals_pos: U32Val, len: U32Val, ) -> Result<MapObject, Self::Error>

Return a new map initialized from a pair of equal-length arrays, one for keys and one for values, given by a pair of linear-memory addresses and a length in Vals.

fn map_unpack_to_linear_memory( &self, map: MapObject, keys_pos: U32Val, vals_pos: U32Val, len: U32Val, ) -> Result<Void, Self::Error>

Copy Vals from map to the array vals_pos, selecting only the keys identified by the array keys_pos. Both arrays have len elements and are identified by linear-memory addresses.

fn vec_new(&self) -> Result<VecObject, Self::Error>

Creates an empty new vector.

fn vec_put( &self, v: VecObject, i: U32Val, x: Val, ) -> Result<VecObject, Self::Error>

Update the value at index i in the vector. Return the new vector. Trap if the index is out of bounds.

fn vec_get(&self, v: VecObject, i: U32Val) -> Result<Val, Self::Error>

Returns the element at index i of the vector. Traps if the index is out of bound.

fn vec_del(&self, v: VecObject, i: U32Val) -> Result<VecObject, Self::Error>

Delete an element in a vector at index i, shifting all elements after it to the left. Return the new vector. Traps if the index is out of bound.

fn vec_len(&self, v: VecObject) -> Result<U32Val, Self::Error>

Returns length of the vector.

fn vec_push_front(&self, v: VecObject, x: Val) -> Result<VecObject, Self::Error>

Push a value to the front of a vector.

fn vec_pop_front(&self, v: VecObject) -> Result<VecObject, Self::Error>

Removes the first element from the vector and returns the new vector. Traps if original vector is empty.

fn vec_push_back(&self, v: VecObject, x: Val) -> Result<VecObject, Self::Error>

Appends an element to the back of the vector.

fn vec_pop_back(&self, v: VecObject) -> Result<VecObject, Self::Error>

Removes the last element from the vector and returns the new vector. Traps if original vector is empty.

fn vec_front(&self, v: VecObject) -> Result<Val, Self::Error>

Return the first element in the vector. Traps if the vector is empty

fn vec_back(&self, v: VecObject) -> Result<Val, Self::Error>

Return the last element in the vector. Traps if the vector is empty

fn vec_insert( &self, v: VecObject, i: U32Val, x: Val, ) -> Result<VecObject, Self::Error>

Inserts an element at index i within the vector, shifting all elements after it to the right. Traps if the index is out of bound

fn vec_append( &self, v1: VecObject, v2: VecObject, ) -> Result<VecObject, Self::Error>

Clone the vector v1, then moves all the elements of vector v2 into it. Return the new vector. Traps if number of elements in the vector overflows a u32.

fn vec_slice( &self, v: VecObject, start: U32Val, end: U32Val, ) -> Result<VecObject, Self::Error>

Copy the elements from start index until end index, exclusive, in the vector and create a new vector from it. Return the new vector. Traps if the index is out of bound.

fn vec_first_index_of(&self, v: VecObject, x: Val) -> Result<Val, Self::Error>

Get the index of the first occurrence of a given element in the vector. Returns the u32 index of the value if it’s there. Otherwise, it returns Void.

fn vec_last_index_of(&self, v: VecObject, x: Val) -> Result<Val, Self::Error>

Get the index of the last occurrence of a given element in the vector. Returns the u32 index of the value if it’s there. Otherwise, it returns Void.

fn vec_binary_search(&self, v: VecObject, x: Val) -> Result<u64, Self::Error>

Binary search a sorted vector for a given element. If it exists, the high 32 bits of the return value is 0x0000_0001 and the low 32 bits contain the u32 index of the element. If it does not exist, the high 32 bits of the return value is 0x0000_0000 and the low-32 bits contain the u32 index at which the element would need to be inserted into the vector to maintain sorted order.

fn vec_new_from_linear_memory( &self, vals_pos: U32Val, len: U32Val, ) -> Result<VecObject, Self::Error>

Return a new vec initialized from an input slice of Vals given by a linear-memory address and length in Vals.

fn vec_unpack_to_linear_memory( &self, vec: VecObject, vals_pos: U32Val, len: U32Val, ) -> Result<Void, Self::Error>

Copy the Vals of a vec into an array at a given linear-memory address and length in Vals.

fn put_contract_data( &self, k: Val, v: Val, t: StorageType, ) -> Result<Void, Self::Error>

fn has_contract_data(&self, k: Val, t: StorageType) -> Result<Bool, Self::Error>

fn get_contract_data(&self, k: Val, t: StorageType) -> Result<Val, Self::Error>

fn del_contract_data(&self, k: Val, t: StorageType) -> Result<Void, Self::Error>

fn create_contract( &self, deployer: AddressObject, wasm_hash: BytesObject, salt: BytesObject, ) -> Result<AddressObject, Self::Error>

Creates the contract instance on behalf of deployer. deployer must authorize this call via Soroban auth framework, i.e. this calls deployer.require_auth with respective arguments. wasm_hash must be a hash of the contract code that has already been uploaded on this network. salt is used to create a unique contract id. Returns the address of the created contract.

fn create_asset_contract( &self, serialized_asset: BytesObject, ) -> Result<AddressObject, Self::Error>

Creates the instance of Stellar Asset contract corresponding to the provided asset. serialized_asset is stellar::Asset XDR serialized to bytes format. Returns the address of the created contract.

fn upload_wasm(&self, wasm: BytesObject) -> Result<BytesObject, Self::Error>

Uploads provided wasm bytecode to the network and returns its identifier (SHA-256 hash). No-op in case if the same Wasm object already exists.

fn update_current_contract_wasm( &self, hash: BytesObject, ) -> Result<Void, Self::Error>

Replaces the executable of the current contract with the provided Wasm code identified by a hash. Wasm entry corresponding to the hash has to already be present in the ledger. The update happens only after the current contract invocation has successfully finished, so this can be safely called in the middle of a function.

fn extend_contract_data_ttl( &self, k: Val, t: StorageType, threshold: U32Val, extend_to: U32Val, ) -> Result<Void, Self::Error>

If the entry’s TTL is below threshold ledgers, extend live_until_ledger_seq such that TTL == extend_to, where TTL is defined as live_until_ledger_seq - current ledger. If attempting to extend the entry past the maximum allowed value (defined as the current ledger + max_entry_ttl - 1), and the entry is Persistent, its new live_until_ledger_seq will be clamped to the max; if the entry is Temporary, the function traps.

fn extend_current_contract_instance_and_code_ttl( &self, threshold: U32Val, extend_to: U32Val, ) -> Result<Void, Self::Error>

If the TTL for the current contract instance and code (if applicable) is below threshold ledgers, extend live_until_ledger_seq such that TTL == extend_to, where TTL is defined as live_until_ledger_seq - current ledger. If attempting to extend past the maximum allowed value (defined as the current ledger + max_entry_ttl - 1), the new live_until_ledger_seq will be clamped to the max.

fn extend_contract_instance_and_code_ttl( &self, contract: AddressObject, threshold: U32Val, extend_to: U32Val, ) -> Result<Void, Self::Error>

If the TTL for the provided contract instance and code (if applicable) is below threshold ledgers, extend live_until_ledger_seq such that TTL == extend_to, where TTL is defined as live_until_ledger_seq - current ledger. If attempting to extend past the maximum allowed value (defined as the current ledger + max_entry_ttl - 1), the new live_until_ledger_seq will be clamped to the max.

fn get_contract_id( &self, deployer: AddressObject, salt: BytesObject, ) -> Result<AddressObject, Self::Error>

Get the id of a contract without creating it. deployer is address of the contract deployer. salt is used to create a unique contract id. Returns the address of the would-be contract.

fn get_asset_contract_id( &self, serialized_asset: BytesObject, ) -> Result<AddressObject, Self::Error>

Get the id of the Stellar Asset contract corresponding to the provided asset without creating the instance. serialized_asset is stellar::Asset XDR serialized to bytes format. Returns the address of the would-be asset contract.

fn extend_contract_instance_ttl( &self, contract: AddressObject, threshold: U32Val, extend_to: U32Val, ) -> Result<Void, Self::Error>

If the TTL for the provided contract instance is below threshold ledgers, extend live_until_ledger_seq such that TTL == extend_to, where TTL is defined as live_until_ledger_seq - current ledger. If attempting to extend past the maximum allowed value (defined as the current ledger + max_entry_ttl - 1), the new live_until_ledger_seq will be clamped to the max.

fn extend_contract_code_ttl( &self, contract: AddressObject, threshold: U32Val, extend_to: U32Val, ) -> Result<Void, Self::Error>

If the TTL for the provided contract’s code (if applicable) is below threshold ledgers, extend live_until_ledger_seq such that TTL == extend_to, where TTL is defined as live_until_ledger_seq - current ledger. If attempting to extend past the maximum allowed value (defined as the current ledger + max_entry_ttl - 1), the new live_until_ledger_seq will be clamped to the max.

fn create_contract_with_constructor( &self, deployer: AddressObject, wasm_hash: BytesObject, salt: BytesObject, constructor_args: VecObject, ) -> Result<AddressObject, Self::Error>

Creates the contract instance on behalf of deployer. Created contract must be created from a Wasm that has a constructor. deployer must authorize this call via Soroban auth framework, i.e. this calls deployer.require_auth with respective arguments. wasm_hash must be a hash of the contract code that has already been uploaded on this network. salt is used to create a unique contract id. constructor_args are forwarded into created contract’s constructor (__constructor) function. Returns the address of the created contract.

fn call( &self, contract: AddressObject, func: Symbol, args: VecObject, ) -> Result<Val, Self::Error>

Calls a function in another contract with arguments contained in vector args. If the call is successful, returns the result of the called function. Traps otherwise.

fn try_call( &self, contract: AddressObject, func: Symbol, args: VecObject, ) -> Result<Val, Self::Error>

Calls a function in another contract with arguments contained in vector args, returning either the result of the called function or an Error if the called function failed. The returned error is either a custom ContractError that the called contract returns explicitly, or an error with type Context and code InvalidAction in case of any other error in the called contract (such as a host function failure that caused a trap). try_call might trap in a few scenarios where the error can’t be meaningfully recovered from, such as running out of budget.

fn serialize_to_bytes(&self, v: Val) -> Result<BytesObject, Self::Error>

Serializes an (SC)Val into XDR opaque Bytes object.

fn deserialize_from_bytes(&self, b: BytesObject) -> Result<Val, Self::Error>

Deserialize a Bytes object to get back the (SC)Val.

fn bytes_copy_to_linear_memory( &self, b: BytesObject, b_pos: U32Val, lm_pos: U32Val, len: U32Val, ) -> Result<Void, Self::Error>

Copies a slice of bytes from a Bytes object specified at offset b_pos with length len into the linear memory at position lm_pos. Traps if either the Bytes object or the linear memory doesn’t have enough bytes.

fn bytes_copy_from_linear_memory( &self, b: BytesObject, b_pos: U32Val, lm_pos: U32Val, len: U32Val, ) -> Result<BytesObject, Self::Error>

Copies a segment of the linear memory specified at position lm_pos with length len, into a Bytes object at offset b_pos. The Bytes object may grow in size to accommodate the new bytes. Traps if the linear memory doesn’t have enough bytes.

fn bytes_new_from_linear_memory( &self, lm_pos: U32Val, len: U32Val, ) -> Result<BytesObject, Self::Error>

Constructs a new Bytes object initialized with bytes copied from a linear memory slice specified at position lm_pos with length len.

fn bytes_new(&self) -> Result<BytesObject, Self::Error>

Create an empty new Bytes object.

fn bytes_put( &self, b: BytesObject, i: U32Val, u: U32Val, ) -> Result<BytesObject, Self::Error>

Update the value at index i in the Bytes object. Return the new Bytes. Trap if the index is out of bounds.

fn bytes_get(&self, b: BytesObject, i: U32Val) -> Result<U32Val, Self::Error>

Returns the element at index i of the Bytes object. Traps if the index is out of bound.

fn bytes_del( &self, b: BytesObject, i: U32Val, ) -> Result<BytesObject, Self::Error>

Delete an element in a Bytes object at index i, shifting all elements after it to the left. Return the new Bytes. Traps if the index is out of bound.

fn bytes_len(&self, b: BytesObject) -> Result<U32Val, Self::Error>

Returns length of the Bytes object.

fn bytes_push( &self, b: BytesObject, u: U32Val, ) -> Result<BytesObject, Self::Error>

Appends an element to the back of the Bytes object.

fn bytes_pop(&self, b: BytesObject) -> Result<BytesObject, Self::Error>

Removes the last element from the Bytes object and returns the new Bytes. Traps if original Bytes is empty.

fn bytes_front(&self, b: BytesObject) -> Result<U32Val, Self::Error>

Return the first element in the Bytes object. Traps if the Bytes is empty

fn bytes_back(&self, b: BytesObject) -> Result<U32Val, Self::Error>

Return the last element in the Bytes object. Traps if the Bytes is empty

fn bytes_insert( &self, b: BytesObject, i: U32Val, u: U32Val, ) -> Result<BytesObject, Self::Error>

Inserts an element at index i within the Bytes object, shifting all elements after it to the right. Traps if the index is out of bound

fn bytes_append( &self, b1: BytesObject, b2: BytesObject, ) -> Result<BytesObject, Self::Error>

Clone the Bytes object b1, then moves all the elements of Bytes object b2 into it. Return the new Bytes. Traps if its length overflows a u32.

fn bytes_slice( &self, b: BytesObject, start: U32Val, end: U32Val, ) -> Result<BytesObject, Self::Error>

Copies the elements from start index until end index, exclusive, in the Bytes object and creates a new Bytes from it. Returns the new Bytes. Traps if the index is out of bound.

fn string_copy_to_linear_memory( &self, s: StringObject, s_pos: U32Val, lm_pos: U32Val, len: U32Val, ) -> Result<Void, Self::Error>

Copies a slice of bytes from a String object specified at offset s_pos with length len into the linear memory at position lm_pos. Traps if either the String object or the linear memory doesn’t have enough bytes.

fn symbol_copy_to_linear_memory( &self, s: SymbolObject, s_pos: U32Val, lm_pos: U32Val, len: U32Val, ) -> Result<Void, Self::Error>

Copies a slice of bytes from a Symbol object specified at offset s_pos with length len into the linear memory at position lm_pos. Traps if either the String object or the linear memory doesn’t have enough bytes.

fn string_new_from_linear_memory( &self, lm_pos: U32Val, len: U32Val, ) -> Result<StringObject, Self::Error>

Constructs a new String object initialized with bytes copied from a linear memory slice specified at position lm_pos with length len.

fn symbol_new_from_linear_memory( &self, lm_pos: U32Val, len: U32Val, ) -> Result<SymbolObject, Self::Error>

Constructs a new Symbol object initialized with bytes copied from a linear memory slice specified at position lm_pos with length len.

fn string_len(&self, s: StringObject) -> Result<U32Val, Self::Error>

Returns length of the String object.

fn symbol_len(&self, s: SymbolObject) -> Result<U32Val, Self::Error>

Returns length of the Symbol object.

fn symbol_index_in_linear_memory( &self, sym: Symbol, slices_pos: U32Val, len: U32Val, ) -> Result<U32Val, Self::Error>

Return the index of a Symbol in an array of linear-memory byte-slices, or trap if not found.

fn compute_hash_sha256( &self, x: BytesObject, ) -> Result<BytesObject, Self::Error>

fn verify_sig_ed25519( &self, k: BytesObject, x: BytesObject, s: BytesObject, ) -> Result<Void, Self::Error>

fn compute_hash_keccak256( &self, x: BytesObject, ) -> Result<BytesObject, Self::Error>

Returns the keccak256 hash of given input bytes.

fn recover_key_ecdsa_secp256k1( &self, msg_digest: BytesObject, signature: BytesObject, recovery_id: U32Val, ) -> Result<BytesObject, Self::Error>

Recovers the SEC-1-encoded ECDSA secp256k1 public key that produced a given 64-byte signature over a given 32-byte msg_digest for a given recovery_id byte. Warning: The msg_digest must be produced by a secure cryptographic hash function on the message, otherwise the attacker can potentially forge signatures. The signature is the ECDSA signature (r, s) serialized as fixed-size big endian scalar values, both r, s must be non-zero and s must be in the lower range. Returns a BytesObject containing 65-bytes representing SEC-1 encoded point in uncompressed format. The recovery_id is an integer value 0, 1, 2, or 3, the low bit (0/1) indicates the parity of the y-coordinate of the public_key (even/odd) and the high bit (3/4) indicate if the r (x-coordinate of k x G) has overflown during its computation.

fn verify_sig_ecdsa_secp256r1( &self, public_key: BytesObject, msg_digest: BytesObject, signature: BytesObject, ) -> Result<Void, Self::Error>

Verifies the signature using an ECDSA secp256r1 public_key on a 32-byte msg_digest. Warning: The msg_digest must be produced by a secure cryptographic hash function on the message, otherwise the attacker can potentially forge signatures. The public_key is expected to be 65 bytes in length, representing a SEC-1 encoded point in uncompressed format. The signature is the ECDSA signature (r, s) serialized as fixed-size big endian scalar values, both r, s must be non-zero and s must be in the lower range.

fn bls12_381_check_g1_is_in_subgroup( &self, point: BytesObject, ) -> Result<Bool, Self::Error>

Checks if the input G1 point is in the correct subgroup.

fn bls12_381_g1_add( &self, point1: BytesObject, point2: BytesObject, ) -> Result<BytesObject, Self::Error>

Adds two BLS12-381 G1 points given in bytes format and returns the resulting G1 point in bytes format. G1 serialization format: concat(be_bytes(X), be_bytes(Y)) and the most significant three bits of X encodes flags, i.e. bits(X) = [compression_flag, infinity_flag, sort_flag, bit_3, .. bit_383]. This function does NOT perform subgroup check on the inputs.

fn bls12_381_g1_mul( &self, point: BytesObject, scalar: U256Val, ) -> Result<BytesObject, Self::Error>

Multiplies a BLS12-381 G1 point by a scalar (Fr), and returns the resulting G1 point in bytes format.

fn bls12_381_g1_msm( &self, vp: VecObject, vs: VecObject, ) -> Result<BytesObject, Self::Error>

Performs multi-scalar-multiplication (inner product) on a vector of BLS12-381 G1 points (Vec<BytesObject>) by a vector of scalars (Vec<U256Val>), and returns the resulting G1 point in bytes format.

fn bls12_381_map_fp_to_g1( &self, fp: BytesObject, ) -> Result<BytesObject, Self::Error>

Maps a BLS12-381 field element (Fp) to G1 point. The input is a BytesObject containing Fp serialized in big-endian order

fn bls12_381_hash_to_g1( &self, msg: BytesObject, dst: BytesObject, ) -> Result<BytesObject, Self::Error>

Hashes a message to a BLS12-381 G1 point, with implementation following the specification in Hashing to Elliptic Curves (ciphersuite ‘BLS12381G1_XMD:SHA-256_SSWU_RO_’). dst is the domain separation tag that will be concatenated with the msg during hashing, it is intended to keep hashing inputs of different applications separate. It is required 0 < len(dst_bytes) < 256. DST must be chosen with care to avoid compromising the application’s security properties. Refer to section 3.1 in the RFC on requirements of DST.

fn bls12_381_check_g2_is_in_subgroup( &self, point: BytesObject, ) -> Result<Bool, Self::Error>

Checks if the input G2 point is in the correct subgroup.

fn bls12_381_g2_add( &self, point1: BytesObject, point2: BytesObject, ) -> Result<BytesObject, Self::Error>

Adds two BLS12-381 G2 points given in bytes format and returns the resulting G2 point in bytes format. G2 serialization format: concat(be_bytes(X_c1), be_bytes(X_c0), be_bytes(Y_c1), be_bytes(Y_c0)), and the most significant three bits of X_c1 are flags i.e. bits(X_c1) = [compression_flag, infinity_flag, sort_flag, bit_3, .. bit_383]. This function does NOT perform subgroup check on the inputs.

fn bls12_381_g2_mul( &self, point: BytesObject, scalar: U256Val, ) -> Result<BytesObject, Self::Error>

Multiplies a BLS12-381 G2 point by a scalar (Fr), and returns the resulting G2 point in bytes format.

fn bls12_381_g2_msm( &self, vp: VecObject, vs: VecObject, ) -> Result<BytesObject, Self::Error>

Performs multi-scalar-multiplication (inner product) on a vector of BLS12-381 G2 points (Vec<BytesObject>) by a vector of scalars (Vec<U256Val>) , and returns the resulting G2 point in bytes format.

fn bls12_381_map_fp2_to_g2( &self, fp2: BytesObject, ) -> Result<BytesObject, Self::Error>

Maps a BLS12-381 quadratic extension field element (Fp2) to G2 point. Fp2 serialization format: concat(be_bytes(c1), be_bytes(c0))

fn bls12_381_hash_to_g2( &self, msg: BytesObject, dst: BytesObject, ) -> Result<BytesObject, Self::Error>

Hashes a message to a BLS12-381 G2 point, with implementation following the specification in Hashing to Elliptic Curves (ciphersuite ‘BLS12381G2_XMD:SHA-256_SSWU_RO_’). dst is the domain separation tag that will be concatenated with the msg during hashing, it is intended to keep hashing inputs of different applications separate. It is required 0 < len(dst_bytes) < 256. DST must be chosen with care to avoid compromising the application’s security properties. Refer to section 3.1 in the RFC on requirements of DST.

fn bls12_381_multi_pairing_check( &self, vp1: VecObject, vp2: VecObject, ) -> Result<Bool, Self::Error>

performs pairing operation on a vector of G1 (Vec<BytesObject>) and a vector of G2 points (Vec<BytesObject>) , return true if the result equals 1_fp12

fn bls12_381_fr_add( &self, lhs: U256Val, rhs: U256Val, ) -> Result<U256Val, Self::Error>

performs addition (lhs + rhs) mod r between two BLS12-381 scalar elements (Fr), where r is the subgroup order

fn bls12_381_fr_sub( &self, lhs: U256Val, rhs: U256Val, ) -> Result<U256Val, Self::Error>

performs subtraction (lhs - rhs) mod r between two BLS12-381 scalar elements (Fr), where r is the subgroup order

fn bls12_381_fr_mul( &self, lhs: U256Val, rhs: U256Val, ) -> Result<U256Val, Self::Error>

performs multiplication (lhs * rhs) mod r between two BLS12-381 scalar elements (Fr), where r is the subgroup order

fn bls12_381_fr_pow( &self, lhs: U256Val, rhs: U64Val, ) -> Result<U256Val, Self::Error>

performs exponentiation of a BLS12-381 scalar element (Fr) with a u64 exponent i.e. lhs.exp(rhs) mod r, where r is the subgroup order

fn bls12_381_fr_inv(&self, lhs: U256Val) -> Result<U256Val, Self::Error>

performs inversion of a BLS12-381 scalar element (Fr) modulo r (the subgroup order)

fn require_auth_for_args( &self, address: AddressObject, args: VecObject, ) -> Result<Void, Self::Error>

Checks if the address has authorized the invocation of the current contract function with the provided arguments. Traps if the invocation hasn’t been authorized.

fn require_auth(&self, address: AddressObject) -> Result<Void, Self::Error>

Checks if the address has authorized the invocation of the current contract function with all the arguments of the invocation. Traps if the invocation hasn’t been authorized.

fn strkey_to_address(&self, strkey: Val) -> Result<AddressObject, Self::Error>

Converts a provided Stellar strkey address of an account or a contract (‘G…’ or ‘C…’ respectively) to an address object. strkey can be either BytesObject or StringObject (the contents should represent the G.../C... string in both cases). Any other valid or invalid strkey (e.g. ‘S…’) will trigger an error. Prefer directly using the Address objects whenever possible. This is only useful in the context of custom messaging protocols (e.g. cross-chain).

fn address_to_strkey( &self, address: AddressObject, ) -> Result<StringObject, Self::Error>

Converts a provided address to Stellar strkey format (‘G…’ for account or ‘C…’ for contract). Prefer directly using the Address objects whenever possible. This is only useful in the context of custom messaging protocols (e.g. cross-chain).

fn authorize_as_curr_contract( &self, auth_entires: VecObject, ) -> Result<Void, Self::Error>

Authorizes sub-contract calls for the next contract call on behalf of the current contract. Every entry in the argument vector corresponds to InvokerContractAuthEntry contract type that authorizes a tree of require_auth calls on behalf of the current contract. The entries must not contain any authorizations for the direct contract call, i.e. if current contract needs to call contract function F1 that calls function F2 both of which require auth, only F2 should be present in auth_entries.

fn dummy0(&self) -> Result<Val, Self::Error>

A dummy function taking 0 arguments and performs no-op. This function is for test purpose only, for measuring the roundtrip cost of invoking a host function, i.e. host->Vm->host.

fn protocol_gated_dummy(&self) -> Result<Val, Self::Error>

A dummy function for testing the protocol gating. Takes 0 arguments and performs no-op. Essentially this function is always protocol-gated out since it has min_supported_protocol == max_supported_protocol == 19, thus having no effect on any protocol (Soroban starts at protocol 20). This is required for testing the scenario where ledger protocol version > host function max supported version, and the ledger protocol version must be <= the env version (which starts at 20, and is a compile-time, non-overridable constant).

fn prng_reseed(&self, seed: BytesObject) -> Result<Void, Self::Error>

Reseed the frame-local PRNG with a given BytesObject, which should be 32 bytes long.

fn prng_bytes_new(&self, length: U32Val) -> Result<BytesObject, Self::Error>

Construct a new BytesObject of the given length filled with bytes drawn from the frame-local PRNG.

fn prng_u64_in_inclusive_range( &self, lo: u64, hi: u64, ) -> Result<u64, Self::Error>

Return a u64 uniformly sampled from the inclusive range [lo,hi] by the frame-local PRNG.

fn prng_vec_shuffle(&self, vec: VecObject) -> Result<VecObject, Self::Error>

Return a (Fisher-Yates) shuffled clone of a given vector, using the frame-local PRNG.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T: VmCallerEnv> Env for T