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[#105] processing: Add docs

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Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This commit is contained in:
Alex Vanin 2021-07-07 18:33:53 +03:00 committed by Alex Vanin
parent 726e7995fc
commit c5ac475d32
2 changed files with 27 additions and 1 deletions
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22
processing/doc.go
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@ -1,2 +1,22 @@
// Processing contract description.
/*
Processing contract is a contract deployed in NeoFS main chain.
Processing contract pays for all multi signature transaction executions when notary
service enabled in main chain. Notary service prepares multi signed transaction,
however they should contain side chain GAS to be executed. It is inconvenient to
ask Alphabet nodes to pay for these transactions: nodes can change over time,
some nodes will spend side chain GAS faster, it creates economic instability.
Processing contract exists to solve this issue. At the Withdraw invocation of
NeoFS contract, user pays fee directly to this contract. This fee is used to
pay for Cheque invocation of NeoFS contract that returns main chain GAS back
to the user. Address of the Processing contract is uses as the first signer in
the multi signature transaction. Therefore NeoVM executes Verify method of the
contract and if invocation is verified, then Processing contract pays for the
execution.
Contract notifications
Processing contract does not produce notifications to process.
*/
package processing

6
processing/processing_contract.go
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@ -18,6 +18,7 @@ const (
multiaddrMethod = "alphabetAddress"
)
// OnNEP17Payment is a callback for NEP-17 compatible native GAS contract.
func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
caller := runtime.GetCallingScriptHash()
if !common.BytesEqual(caller, []byte(gas.Hash)) {
@ -50,6 +51,8 @@ func _deploy(data interface{}, isUpdate bool) {
runtime.Log("processing contract initialized")
}
// Migrate method updates contract source code and manifest. Can be invoked
// only by contract owner.
func Migrate(script []byte, manifest []byte, data interface{}) bool {
ctx := storage.GetReadOnlyContext()
@ -64,6 +67,8 @@ func Migrate(script []byte, manifest []byte, data interface{}) bool {
return true
}
// Verify method returns true if transaction contains valid multi signature of
// Alphabet nodes of the Inner Ring.
func Verify() bool {
ctx := storage.GetContext()
neofsContractAddr := storage.Get(ctx, neofsContractKey).(interop.Hash160)
@ -72,6 +77,7 @@ func Verify() bool {
return runtime.CheckWitness(multiaddr)
}
// Version returns version of the contract.
func Version() int {
return version
}