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README.md

Repository files navigation

Proof of work during Advanced Solidity bootcamp

Note-All of the concept related answers will be in README.md on a weekly basis

Note-All of the code related solutions will be in respective directories on a weekly basis

Week - 1

Topics covered -

  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?

Q1 Why is client diversity important for Ethereum?

"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."

"Having many independently developed and maintained clients is vital for the health of a decentralized network"

* Bugs* Resilience to attacks* Proof of finality* Shared responsibility

Q2 Where is the full Ethereum State held?

"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."

"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"

Q3 What is replay attack? which 2 pieces of information can prevent it?

"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"

1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages

2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.

Q4In a contract, how do we know who called a view function?

To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.

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✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨

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, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
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Readme
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
Resources
Readme
Activity
Stars
0 stars
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1 watching
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
Resources
Readme
Activity
Stars
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1 watching
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
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0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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9 Commits
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NameName
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basics-solidity
week-1
week-1
.DS_Store
.DS_Store
README.md
README.md
Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
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, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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9 Commits
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README.md
Repository files navigation
Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
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Proof of work during Advanced Solidity bootcamp
Note-All of the concept related answers will be in README.md on a weekly basis
Note-All of the code related solutions will be in respective directories on a weekly basis
Week - 1
Topics covered -
  • Blockchain Theory / Modular chains
  • L2 introduction
  • Ethereum Roadmap
  • Ethereum consensus
  • Ethereum state / transactions and blocks
  • Account abstraction
  • Danksharding
  • Cryptography review
  • Why is client diversity important for Ethereum?
  • Where is the full Ethereum state held?
  • What is replay attack? which 2 pieces of information can prevent it?
  • In a contract, how do we know who called a view function?
Q1 Why is client diversity important for Ethereum?
"Ethereum is a distributed network of computers (known as nodes) running software that can verify blocks and transaction data. The software must be run on your computer to turn it into an Ethereum node. There are two separate pieces of software (known as 'clients') required to form a node."
"Having many independently developed and maintained clients is vital for the health of a decentralized network"
* Bugs* Resilience to attacks* Proof of finality* Shared responsibility
Q2 Where is the full Ethereum State held?
"The full Ethereum state is stored in a modified Patricia Merkle tree (MPT) data structure, which is a database. The MPT is a tree-like structure that stores key-value pairs efficiently. Each node in the tree has a key, which is the node's hash, and a value, which is the content held within the node."
"The Ethereum state is a mapping of Ethereum addresses and their account state. The state is changed by blocks that are full of data in the form of transactions"
Q3 What is replay attack? which 2 pieces of information can prevent it?
"A replay attack is when a malicious actor captures and retransmits valid data to achieve fraudulent authentication or execute unauthorized actions in a network"
1.Timestamps: Similarly, timestamps are a widely used tool for preventing replay attacks. Because timestamps cryptographically ensure the time a message has been sent, they can be used to set arbitrary time spans that determine the validity of messages
2.Multi-Factor Authentication: Multi-factor authentication, also known as MFA, is another useful tool to prevent replay attacks because it adds additional authentication steps that are not part of the original data transmission.
Q4In a contract, how do we know who called a view function?
To determine who called a view function in a Solidity contract, you can use the global variable msg.sender, which holds the address of the account that initiated the callThis works for both view and non-view functions. For example, in a view function, msg.sender will return the caller’s address without modifying the contract’s state.
About
✨This repo contains all of the work and assignments done during the Advanced Solidity bootcamp ✨
Topics
evm-blockchainevm-opcodesl2scalability
Resources
Readme
Activity
Stars
0 stars
Watchers
1 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages