mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-05-29 20:31:04 +00:00
Alexander Theißen
51c37ecc15
* Make host functions return TrapReason This avoids the need to manually store any trap reasons to the `Runtime` from the host function. This adds the following benefits: * It properly composes with the upcoming chain extensions * Missing to set a trap value is now a compile error * Add chain extension The chain extension is a way for the contract author to add new host functions for contracts to call. * Add tests for chain extensions * Fix regression in set_rent.wat fixture Not all offsets where properly updated when changing the fixtures for the new salt on instantiate. * Pre-charge a weight amount based off the specified length * Improve fn write docs * Renamed state to phantom * Fix typo
47 lines
1.2 KiB
WebAssembly Text Format
47 lines
1.2 KiB
WebAssembly Text Format
;; Call chain extension by passing through input and output of this contract
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(module
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(import "seal0" "seal_call_chain_extension"
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(func $seal_call_chain_extension (param i32 i32 i32 i32 i32) (result i32))
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)
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(import "seal0" "seal_input" (func $seal_input (param i32 i32)))
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(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
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(import "env" "memory" (memory 16 16))
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(func $assert (param i32)
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(block $ok
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(br_if $ok (get_local 0))
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(unreachable)
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)
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)
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;; [0, 4) len of input output
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(data (i32.const 0) "\02")
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;; [4, 12) buffer for input
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;; [12, 16) len of output buffer
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(data (i32.const 12) "\02")
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;; [16, inf) buffer for output
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(func (export "deploy"))
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(func (export "call")
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(call $seal_input (i32.const 4) (i32.const 0))
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;; the chain extension passes through the input and returns it as output
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(call $seal_call_chain_extension
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(i32.load8_u (i32.const 4)) ;; func_id
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(i32.const 4) ;; input_ptr
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(i32.load (i32.const 0)) ;; input_len
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(i32.const 16) ;; output_ptr
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(i32.const 12) ;; output_len_ptr
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)
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;; the chain extension passes through the func_id
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(call $assert (i32.eq (i32.load8_u (i32.const 4))))
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(call $seal_return (i32.const 0) (i32.const 16) (i32.load (i32.const 12)))
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)
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)
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