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contracts: Composable ChainExtension (#11816)

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* Add `RegisteredChainExtension`

* Add tests

* Update frame/contracts/src/chain_extension.rs

Co-authored-by: Michael Müller <michi@parity.io>

* Add more docs

* Remove debugging leftover

* Make ChainExtension-registry lowercase

* Apply suggestions from code review

Co-authored-by: Hernando Castano <HCastano@users.noreply.github.com>

* Improve clarity of test inputs

Co-authored-by: Michael Müller <michi@parity.io>
Co-authored-by: Hernando Castano <HCastano@users.noreply.github.com>
This commit is contained in:
Alexander Theißen
2022-07-14 20:14:28 +02:00
committed by GitHub
parent a98010a889
commit 8dbfcd3928
5 changed files with 216 additions and 30 deletions
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substrate/frame/contracts/fixtures/chain_extension.wat
+5 -5
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@@ -15,12 +15,12 @@
)
;; [0, 4) len of input output
(data (i32.const 0) "\02")
(data (i32.const 0) "\08")
;; [4, 12) buffer for input
;; [12, 16) len of output buffer
(data (i32.const 12) "\02")
;; [12, 48) len of output buffer
(data (i32.const 12) "\20")
;; [16, inf) buffer for output
@@ -31,7 +31,7 @@
;; the chain extension passes through the input and returns it as output
(call $seal_call_chain_extension
(i32.load8_u (i32.const 4)) ;; func_id
(i32.load (i32.const 4)) ;; func_id
(i32.const 4) ;; input_ptr
(i32.load (i32.const 0)) ;; input_len
(i32.const 16) ;; output_ptr
@@ -39,7 +39,7 @@
)
;; the chain extension passes through the func_id
(call $assert (i32.eq (i32.load8_u (i32.const 4))))
(call $assert (i32.eq (i32.load (i32.const 4))))
(call $seal_return (i32.const 0) (i32.const 16) (i32.load (i32.const 12)))
)