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seal: Rework contracts API (#6573)

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* Transition getter functions to not use scratch buffer

* Remove scratch buffer from ext_get_storage

* Remove scratch buffer from ext_call

* Remove scratch buffer from ext_instantiate

* Add ext_input and remove scratch buffer

* Rework error handling (changes RPC exposed data)

* ext_return passes a flags field instead of a return code
	* Flags is only for seal and not for the caller
	* flags: u32 replaced status_code: u8 in RPC exposed type
* API functions use a unified error type (ReturnCode)
* ext_transfer now traps on error to be consistent with call and instantiate

* Remove the no longer used `Dispatched` event

* Updated inline documentation

* Prevent skipping of copying the output for getter API

* Return gas_consumed from the RPC contracts call interface

* Updated COMPLEXTITY.md

* Rename ext_gas_price to ext_weight_to_fee

* Align comments with spaces

* Removed no longer used `ExecError`

* Remove possible panic in `from_typed_value`

* Use a struct as associated data for SpecialTrap::Return

* Fix nits in COMPLEXITY.md

* Renamed SpecialTrap to TrapReason

* Fix test

* Finish renaming special_trap -> trap_reason

* Remove no longer used get_runtime_storage

* fixup! Remove no longer used get_runtime_storage

* Removed tabs for comment aligment
This commit is contained in:
Alexander Theißen
2020-07-09 15:07:02 +02:00
committed by GitHub
parent a4427f3635
commit 25de5b5c78
26 changed files with 1116 additions and 1256 deletions
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substrate/frame/contracts/fixtures/drain.wat
+15 -15
View File
@@ -1,10 +1,15 @@
(module
(import "env" "ext_scratch_size" (func $ext_scratch_size (result i32)))
(import "env" "ext_scratch_read" (func $ext_scratch_read (param i32 i32 i32)))
(import "env" "ext_balance" (func $ext_balance))
(import "env" "ext_call" (func $ext_call (param i32 i32 i64 i32 i32 i32 i32) (result i32)))
(import "env" "ext_balance" (func $ext_balance (param i32 i32)))
(import "env" "ext_call" (func $ext_call (param i32 i32 i64 i32 i32 i32 i32 i32 i32) (result i32)))
(import "env" "memory" (memory 1 1))
;; [0, 8) reserved for $ext_balance output
;; [8, 16) length of the buffer
(data (i32.const 8) "\08")
;; [16, inf) zero initialized
(func $assert (param i32)
(block $ok
(br_if $ok
@@ -18,34 +23,29 @@
(func (export "call")
;; Send entire remaining balance to the 0 address.
(call $ext_balance)
(call $ext_balance (i32.const 0) (i32.const 8))
;; Balance should be encoded as a u64.
(call $assert
(i32.eq
(call $ext_scratch_size)
(i32.load (i32.const 8))
(i32.const 8)
)
)
;; Read balance into memory.
(call $ext_scratch_read
(i32.const 8) ;; Pointer to write balance to
(i32.const 0) ;; Offset into scratch buffer
(i32.const 8) ;; Length of encoded balance
)
;; Self-destruct by sending full balance to the 0 address.
(call $assert
(i32.eq
(call $ext_call
(i32.const 0) ;; Pointer to destination address
(i32.const 16) ;; Pointer to destination address
(i32.const 8) ;; Length of destination address
(i64.const 0) ;; How much gas to devote for the execution. 0 = all.
(i32.const 8) ;; Pointer to the buffer with value to transfer
(i32.const 0) ;; Pointer to the buffer with value to transfer
(i32.const 8) ;; Length of the buffer with value to transfer
(i32.const 0) ;; Pointer to input data buffer address
(i32.const 0) ;; Length of input data buffer
(i32.const 4294967295) ;; u32 max sentinel value: do not copy output
(i32.const 0) ;; Length is ignored in this case
)
(i32.const 0)
)