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114 lines
4.5 KiB
Go
114 lines
4.5 KiB
Go
package ledger
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import "github.com/nspcc-dev/neo-go/pkg/interop"
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// TransactionSigner represent the signer of a NEO transaction. It's similar to
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// Signer class in Neo .net framework.
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type TransactionSigner struct {
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// Account represents the account (160 bit BE value in a 20 byte slice) of
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// the given signer.
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Account interop.Hash160
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// Scopes represents a set of witness flags for the given signer.
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Scopes SignerScope
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// Contracts represents the set of contract hashes (160 bit BE value in a 20
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// byte slice) allowed to be called by the signer. It is only non-empty if
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// CustomContracts scope flag is set.
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AllowedContracts []interop.Hash160
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// AllowedGroups represents the set of contract groups (ecdsa public key
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// bytes in a 33 byte slice) allowed to be called by the signer. It is only
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// non-empty if CustomGroups scope flag is set.
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AllowedGroups []interop.PublicKey
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// Rules represents a rule-based witness scope of the given signer. It is
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// only non-empty if Rules scope flag is set.
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Rules []WitnessRule
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}
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// SignerScope represents a signer's witness scope.
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type SignerScope byte
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// Various witness scopes.
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const (
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// None specifies that no contract was witnessed. Only signs the transaction
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// and pays GAS fee if a sender.
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None SignerScope = 0
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// CalledByEntry means that the witness is valid only when the witness
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// checking contract is called from the entry script.
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CalledByEntry SignerScope = 0x01
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// CustomContracts define custom hash for contract-specific witness.
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CustomContracts SignerScope = 0x10
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// CustomGroups define custom public key for group members.
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CustomGroups SignerScope = 0x20
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// Rules is a set of conditions with boolean operators.
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Rules SignerScope = 0x40
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// Global allows this witness in all contexts. This cannot be combined with
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// other flags.
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Global SignerScope = 0x80
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)
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// WitnessRule represents a single rule for Rules witness scope.
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type WitnessRule struct {
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// Action denotes whether the witness condition should be accepted or denied.
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Action WitnessAction
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// Condition holds a set of nested witness rules. Max nested depth is 2.
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Condition WitnessCondition
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}
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// WitnessAction represents an action to perform in WitnessRule if
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// witness condition matches.
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type WitnessAction byte
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// Various rule-based witness actions.
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const (
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// WitnessDeny rejects current witness if condition is met.
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WitnessDeny WitnessAction = 0
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// WitnessAllow approves current witness if condition is met.
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WitnessAllow WitnessAction = 1
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)
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// WitnessCondition represents a single witness condition for a rule-based
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// witness. Its type can always be safely accessed, but trying to access its
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// value causes runtime exception for those types that don't have value
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// (currently, it's only CalledByEntry witness condition).
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type WitnessCondition struct {
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Type WitnessConditionType
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// Depends on the witness condition Type, its value can be asserted to the
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// certain structure according to the following rule:
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// WitnessBoolean -> bool
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// WitnessNot -> []WitnessCondition with one element
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// WitnessAnd -> []WitnessCondition
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// WitnessOr -> []WitnessCondition
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// WitnessScriptHash -> interop.Hash160
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// WitnessGroup -> interop.PublicKey
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// WitnessCalledByContract -> interop.Hash160
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// WitnessCalledByGroup -> interop.PublicKey
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// WitnessCalledByEntry -> doesn't have value, thus, an attempt to access the Value leads to runtime exception.
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Value interface{}
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}
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// WitnessConditionType represents the type of rule-based witness condition.
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type WitnessConditionType byte
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// Various witness condition types
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const (
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// WitnessBoolean is a generic boolean condition.
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WitnessBoolean WitnessConditionType = 0x00
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// WitnessNot reverses another condition.
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WitnessNot WitnessConditionType = 0x01
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// WitnessAnd means that all conditions must be met.
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WitnessAnd WitnessConditionType = 0x02
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// WitnessOr means that any of conditions must be met.
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WitnessOr WitnessConditionType = 0x03
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// WitnessScriptHash matches executing contract's script hash.
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WitnessScriptHash WitnessConditionType = 0x18
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// WitnessGroup matches executing contract's group key.
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WitnessGroup WitnessConditionType = 0x19
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// WitnessCalledByEntry matches when current script is an entry script or is
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// called by an entry script.
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WitnessCalledByEntry WitnessConditionType = 0x20
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// WitnessCalledByContract matches when current script is called by the
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// specified contract.
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WitnessCalledByContract WitnessConditionType = 0x28
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// WitnessCalledByGroup matches when current script is called by contract
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// belonging to the specified group.
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WitnessCalledByGroup WitnessConditionType = 0x29
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)
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