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git://jb55.com/damus
synced 2024-09-30 00:40:45 +00:00
calculate proof of work on events
Signed-off-by: William Casarin <jb55@jb55.com>
This commit is contained in:
parent
1f046ac021
commit
e0059388e8
@ -17,6 +17,7 @@
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4C75EFB528049D790006080F /* Relay.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C75EFB428049D790006080F /* Relay.swift */; };
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4C75EFB728049D990006080F /* RelayPool.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C75EFB628049D990006080F /* RelayPool.swift */; };
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4C75EFB92804A2740006080F /* EventView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C75EFB82804A2740006080F /* EventView.swift */; };
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4C75EFBB2804A34C0006080F /* ProofOfWork.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4C75EFBA2804A34C0006080F /* ProofOfWork.swift */; };
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4CE6DEE727F7A08100C66700 /* damusApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4CE6DEE627F7A08100C66700 /* damusApp.swift */; };
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4CE6DEE927F7A08100C66700 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 4CE6DEE827F7A08100C66700 /* ContentView.swift */; };
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4CE6DEEB27F7A08200C66700 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 4CE6DEEA27F7A08200C66700 /* Assets.xcassets */; };
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@ -56,6 +57,7 @@
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4C75EFB428049D790006080F /* Relay.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = Relay.swift; sourceTree = "<group>"; };
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4C75EFB628049D990006080F /* RelayPool.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = RelayPool.swift; sourceTree = "<group>"; };
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4C75EFB82804A2740006080F /* EventView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = EventView.swift; sourceTree = "<group>"; };
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4C75EFBA2804A34C0006080F /* ProofOfWork.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ProofOfWork.swift; sourceTree = "<group>"; };
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4CE6DEE327F7A08100C66700 /* damus.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = damus.app; sourceTree = BUILT_PRODUCTS_DIR; };
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4CE6DEE627F7A08100C66700 /* damusApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = damusApp.swift; sourceTree = "<group>"; };
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4CE6DEE827F7A08100C66700 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
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@ -116,6 +118,7 @@
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4C75EFB228049D640006080F /* NostrEvent.swift */,
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4C75EFB428049D790006080F /* Relay.swift */,
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4C75EFB628049D990006080F /* RelayPool.swift */,
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4C75EFBA2804A34C0006080F /* ProofOfWork.swift */,
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);
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path = Nostr;
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sourceTree = "<group>";
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@ -329,6 +332,7 @@
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4CE6DEE727F7A08100C66700 /* damusApp.swift in Sources */,
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4C75EFA427FA577B0006080F /* PostView.swift in Sources */,
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4C75EFB528049D790006080F /* Relay.swift in Sources */,
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4C75EFBB2804A34C0006080F /* ProofOfWork.swift in Sources */,
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);
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runOnlyForDeploymentPostprocessing = 0;
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};
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@ -25,6 +25,7 @@ struct NostrEvent: Decodable, Identifiable {
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let tags: [[String]]
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let content: String
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let sig: String
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var pow: Int?
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}
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func decode_nostr_event(txt: String) -> NostrResponse? {
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@ -25,6 +25,7 @@ enum NostrResponse: Decodable {
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print(error)
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throw error
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}
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ev.pow = count_hash_leading_zero_bits(ev.id)
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self = .event(sub_id, ev)
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return
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} else if typ == "NOTICE" {
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95
damus/Nostr/ProofOfWork.swift
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95
damus/Nostr/ProofOfWork.swift
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@ -0,0 +1,95 @@
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//
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// ProofOfWork.swift
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// damus
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//
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// Created by William Casarin on 2022-04-11.
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//
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import Foundation
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func zero_bits(_ argb: UInt8) -> Int
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{
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var b = argb
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var n: Int = 0;
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if b == 0 {
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return 8;
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}
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while true {
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b >>= 1;
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if b != 0 {
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n += 1;
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} else {
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break
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}
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}
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return 7-n;
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}
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func count_hash_leading_zero_bits(_ hash: String) -> Int?
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{
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guard let decoded = hex_decode(hash) else {
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return nil
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}
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return count_leading_zero_bits(decoded)
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}
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/* find the number of leading zero bits in a hash */
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func count_leading_zero_bits(_ hash: [UInt8]) -> Int
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{
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var bits: Int = 0
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var total: Int = 0
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for c in hash {
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bits = zero_bits(c)
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total += bits
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if (bits != 8) {
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break
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}
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}
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return total
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}
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func char_to_hex(_ c: UInt8) -> UInt8?
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{
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// 0 && 9
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if (c >= 48 && c <= 57) {
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return c - 48 // 0
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}
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// a && f
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if (c >= 97 && c <= 102) {
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return c - 97 + 10;
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}
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// A && F
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if (c >= 65 && c <= 70) {
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return c - 65 + 10;
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}
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return nil;
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}
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func hex_decode(_ str: String) -> [UInt8]?
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{
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var ret: [UInt8] = []
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let chars = Array(str.utf8)
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for c in zip(chars, chars[1...]) {
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guard let c1 = char_to_hex(c.0) else {
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return nil
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}
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guard let c2 = char_to_hex(c.1) else {
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return nil
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}
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ret.append((c1 << 4) | c2)
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}
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return ret
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}
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