Files
pezkuwi-subxt/substrate/frame/contracts/fixtures/data/crypto_hashes.wat
T
PG Herveou 64effd0e6f Contracts move fixtures to new crate (#2246)
Small PR that introduce a new crate that will host RISC-V & wasm
fixtures for testing pallet-contracts
2023-11-10 13:22:47 +02:00

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(module
(import "seal0" "seal_input" (func $seal_input (param i32 i32)))
(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
(import "seal0" "seal_hash_sha2_256" (func $seal_hash_sha2_256 (param i32 i32 i32)))
(import "seal0" "seal_hash_keccak_256" (func $seal_hash_keccak_256 (param i32 i32 i32)))
(import "seal0" "seal_hash_blake2_256" (func $seal_hash_blake2_256 (param i32 i32 i32)))
(import "seal0" "seal_hash_blake2_128" (func $seal_hash_blake2_128 (param i32 i32 i32)))
(import "env" "memory" (memory 1 1))
(type $hash_fn_sig (func (param i32 i32 i32)))
(table 8 funcref)
(elem (i32.const 1)
$seal_hash_sha2_256
$seal_hash_keccak_256
$seal_hash_blake2_256
$seal_hash_blake2_128
)
(data (i32.const 1) "20202010201008") ;; Output sizes of the hashes in order in hex.
;; Not in use by the tests besides instantiating the contract.
(func (export "deploy"))
;; Called by the tests.
;;
;; The `call` function expects data in a certain format in the input buffer.
;;
;; 1. The first byte encodes an identifier for the crypto hash function
;; under test. (*)
;; 2. The rest encodes the input data that is directly fed into the
;; crypto hash function chosen in 1.
;;
;; The `deploy` function then computes the chosen crypto hash function
;; given the input and puts the result into the output buffer.
;; After contract execution the test driver then asserts that the returned
;; values are equal to the expected bytes for the input and chosen hash
;; function.
;;
;; (*) The possible value for the crypto hash identifiers can be found below:
;;
;; | value | Algorithm | Bit Width |
;; |-------|-----------|-----------|
;; | 0 | SHA2 | 256 |
;; | 1 | KECCAK | 256 |
;; | 2 | BLAKE2 | 256 |
;; | 3 | BLAKE2 | 128 |
;; ---------------------------------
(func (export "call")
(local $chosen_hash_fn i32)
(local $input_len_ptr i32)
(local $input_ptr i32)
(local $input_len i32)
(local $output_ptr i32)
(local $output_len i32)
(local.set $input_len_ptr (i32.const 256))
(local.set $input_ptr (i32.const 10))
(i32.store (local.get $input_len_ptr) (i32.const 246))
(call $seal_input (local.get $input_ptr) (local.get $input_len_ptr))
(local.set $chosen_hash_fn (i32.load8_u (local.get $input_ptr)))
(if (i32.gt_u (local.get $chosen_hash_fn) (i32.const 7))
;; We check that the chosen hash fn identifier is within bounds: [0,7]
(unreachable)
)
(local.set $input_ptr (i32.add (local.get $input_ptr) (i32.const 1)))
(local.set $input_len (i32.sub (i32.load (local.get $input_len_ptr)) (i32.const 1)))
(local.set $output_len (i32.load8_u (local.get $chosen_hash_fn)))
(call_indirect (type $hash_fn_sig)
(local.get $input_ptr)
(local.get $input_len)
(local.get $input_ptr)
(local.get $chosen_hash_fn) ;; Which crypto hash function to execute.
)
(call $seal_return
(i32.const 0)
(local.get $input_ptr) ;; Linear memory location of the output buffer.
(local.get $output_len) ;; Number of output buffer bytes.
)
(unreachable)
)
)