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GreenBaneling | Supercolony
a36e881783
* Implemented `seal_ecdsa_recovery` function in the contract pallet. Added benchmark and unit test. * Run `cargo fmt` * Skip fmt for slices * Changes according comments in pull request. * Fix build without `unstable-interface` feature * Applied suggestion from the review * Apply suggestions from code review Co-authored-by: Alexander Theißen <alex.theissen@me.com> * Apply suggestions from code review Co-authored-by: Alexander Theißen <alex.theissen@me.com> * Changed RecoveryFailed to EcdsaRecoverFailed * Manually updated weights.rs * Apply suggestions from code review Co-authored-by: Michael Müller <mich@elmueller.net> Co-authored-by: Alexander Theißen <alex.theissen@me.com> Co-authored-by: Michael Müller <mich@elmueller.net>
56 lines
1.6 KiB
WebAssembly Text Format
56 lines
1.6 KiB
WebAssembly Text Format
;; This contract:
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;; 1) Reads signature and message hash from the input
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;; 2) Calls ecdsa_recover
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;; 3) Validates that result is Success
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;; 4) Returns recovered compressed public key
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(module
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(import "__unstable__" "seal_ecdsa_recover" (func $seal_ecdsa_recover (param i32 i32 i32) (result i32)))
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(import "seal0" "seal_return" (func $seal_return (param i32 i32 i32)))
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(import "seal0" "seal_input" (func $seal_input (param i32 i32)))
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(import "env" "memory" (memory 1 1))
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(func $assert (param i32)
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(block $ok
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(br_if $ok
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(get_local 0)
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)
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(unreachable)
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)
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)
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(func (export "deploy"))
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;; [4, 8) len of signature + message hash - 65 bytes + 32 byte = 97 bytes
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(data (i32.const 4) "\61")
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;; Memory layout during `call`
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;; [10, 75) signature
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;; [75, 107) message hash
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(func (export "call")
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(local $signature_ptr i32)
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(local $message_hash_ptr i32)
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(local $result i32)
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(local.set $signature_ptr (i32.const 10))
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(local.set $message_hash_ptr (i32.const 75))
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;; Read signature and message hash - 97 bytes
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(call $seal_input (local.get $signature_ptr) (i32.const 4))
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(local.set
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$result
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(call $seal_ecdsa_recover
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(local.get $signature_ptr)
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(local.get $message_hash_ptr)
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(local.get $signature_ptr) ;; Store output into message signature ptr, because we don't need it anymore
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)
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)
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(call $assert
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(i32.eq
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(local.get $result) ;; The result of recovery execution
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(i32.const 0x0) ;; 0x0 - Success result
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)
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)
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;; exit with success and return recovered public key
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(call $seal_return (i32.const 0) (local.get $signature_ptr) (i32.const 33))
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)
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)
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