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How does the contract TwitterHumanityApplicant queries the Twitter API?
Can an external account create a contract which can do anything the external account tells it to do?How can a DApp user make function calls to his and only his contract at a later stage after creating and deploying the contract to Ethereum?Contract variable changes predictionIf a contract's function calls a function of another contract within it, is the address of the contract the msg.sender?How does this honeypot contract work?What is causing gas required exceeds allowance or always failing transaction?Best practices for handling payment in smart contractsBeginner - Design pattern for a hybrid dappAre there a standard for generating a unique thing to send to the smart contract?How to cearte a contract with sub contracts
TwitterHumanityApplicant is (as I understand) a smart contract that validates that a human (or a Twitter user) owns a wallet.
I was expecting to see in the contract code something that resembles a call to the Twitter API to find a tweet by the user that includes the wallet address. I couldn't find anything that looks like an API endpoint. Maybe I missed it, as I am very new to Solidity.
How does this contract checks that the Twitter account owner tweeted the wallet address?
contract-development
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
TwitterHumanityApplicant is (as I understand) a smart contract that validates that a human (or a Twitter user) owns a wallet.
I was expecting to see in the contract code something that resembles a call to the Twitter API to find a tweet by the user that includes the wallet address. I couldn't find anything that looks like an API endpoint. Maybe I missed it, as I am very new to Solidity.
How does this contract checks that the Twitter account owner tweeted the wallet address?
contract-development
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
TwitterHumanityApplicant is (as I understand) a smart contract that validates that a human (or a Twitter user) owns a wallet.
I was expecting to see in the contract code something that resembles a call to the Twitter API to find a tweet by the user that includes the wallet address. I couldn't find anything that looks like an API endpoint. Maybe I missed it, as I am very new to Solidity.
How does this contract checks that the Twitter account owner tweeted the wallet address?
contract-development
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
TwitterHumanityApplicant is (as I understand) a smart contract that validates that a human (or a Twitter user) owns a wallet.
I was expecting to see in the contract code something that resembles a call to the Twitter API to find a tweet by the user that includes the wallet address. I couldn't find anything that looks like an API endpoint. Maybe I missed it, as I am very new to Solidity.
How does this contract checks that the Twitter account owner tweeted the wallet address?
contract-development
contract-development
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
VictorVictor
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 8 hours ago
VictorVictor
1062
asked 8 hours ago
VictorVictor
1062
1062
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
As per Lauri's answer, it doesn't immediately appear there are any oracle calls in any of the contracts used. (I had a poke around.)
Looking at this Medium post, it appears that verification currently relies on real humans:
"Unfortunately, authenticating a human identity is not a problem that
a smart contract can solve. Instead, it is up to the community to come
to a consensus on the best approach for identity verification.
As a first approach, we recommend social verification."
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
add a comment |
Without trying to interpret everything the contract does, it's obvious that there is nothing concrete about verifying Twitter handle. It has multiple calls to other external contracts which may do the verification part but impossible to know.
In general smart contracts can't interact with the rest of the world. They are fully isolated inside the EVM (Ethereum Virtual Machine) and are deterministic. All information they have must be already inside the blockchain and therefore they can't directly query external sources.
What is needed is something called oracles. They provide data from the internet into the blockchain on demand. So you can call an oracle smart contract, it emits certain events, the oracle's backend systems notice the events and issue a transaction to the blockchain where they include the requested data. In that way the requested data is added into the blockchain and made available for any smart contract which requested the data.
So if the contract you showed us really does some Twitter verification it has to utilize oracles somewhere. As there are no direct oracle calls in the displayed code the call must be somewhere in the external contracts.
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
As per Lauri's answer, it doesn't immediately appear there are any oracle calls in any of the contracts used. (I had a poke around.)
Looking at this Medium post, it appears that verification currently relies on real humans:
"Unfortunately, authenticating a human identity is not a problem that
a smart contract can solve. Instead, it is up to the community to come
to a consensus on the best approach for identity verification.
As a first approach, we recommend social verification."
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
add a comment |
As per Lauri's answer, it doesn't immediately appear there are any oracle calls in any of the contracts used. (I had a poke around.)
Looking at this Medium post, it appears that verification currently relies on real humans:
"Unfortunately, authenticating a human identity is not a problem that
a smart contract can solve. Instead, it is up to the community to come
to a consensus on the best approach for identity verification.
As a first approach, we recommend social verification."
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
add a comment |
As per Lauri's answer, it doesn't immediately appear there are any oracle calls in any of the contracts used. (I had a poke around.)
Looking at this Medium post, it appears that verification currently relies on real humans:
"Unfortunately, authenticating a human identity is not a problem that
a smart contract can solve. Instead, it is up to the community to come
to a consensus on the best approach for identity verification.
As a first approach, we recommend social verification."
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
As per Lauri's answer, it doesn't immediately appear there are any oracle calls in any of the contracts used. (I had a poke around.)
Looking at this Medium post, it appears that verification currently relies on real humans:
"Unfortunately, authenticating a human identity is not a problem that
a smart contract can solve. Instead, it is up to the community to come
to a consensus on the best approach for identity verification.
As a first approach, we recommend social verification."
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
answered 7 hours ago
Richard HorrocksRichard Horrocks
22.6k1049106
22.6k1049106
add a comment |
add a comment |
Without trying to interpret everything the contract does, it's obvious that there is nothing concrete about verifying Twitter handle. It has multiple calls to other external contracts which may do the verification part but impossible to know.
In general smart contracts can't interact with the rest of the world. They are fully isolated inside the EVM (Ethereum Virtual Machine) and are deterministic. All information they have must be already inside the blockchain and therefore they can't directly query external sources.
What is needed is something called oracles. They provide data from the internet into the blockchain on demand. So you can call an oracle smart contract, it emits certain events, the oracle's backend systems notice the events and issue a transaction to the blockchain where they include the requested data. In that way the requested data is added into the blockchain and made available for any smart contract which requested the data.
So if the contract you showed us really does some Twitter verification it has to utilize oracles somewhere. As there are no direct oracle calls in the displayed code the call must be somewhere in the external contracts.
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
add a comment |
Without trying to interpret everything the contract does, it's obvious that there is nothing concrete about verifying Twitter handle. It has multiple calls to other external contracts which may do the verification part but impossible to know.
In general smart contracts can't interact with the rest of the world. They are fully isolated inside the EVM (Ethereum Virtual Machine) and are deterministic. All information they have must be already inside the blockchain and therefore they can't directly query external sources.
What is needed is something called oracles. They provide data from the internet into the blockchain on demand. So you can call an oracle smart contract, it emits certain events, the oracle's backend systems notice the events and issue a transaction to the blockchain where they include the requested data. In that way the requested data is added into the blockchain and made available for any smart contract which requested the data.
So if the contract you showed us really does some Twitter verification it has to utilize oracles somewhere. As there are no direct oracle calls in the displayed code the call must be somewhere in the external contracts.
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
add a comment |
Without trying to interpret everything the contract does, it's obvious that there is nothing concrete about verifying Twitter handle. It has multiple calls to other external contracts which may do the verification part but impossible to know.
In general smart contracts can't interact with the rest of the world. They are fully isolated inside the EVM (Ethereum Virtual Machine) and are deterministic. All information they have must be already inside the blockchain and therefore they can't directly query external sources.
What is needed is something called oracles. They provide data from the internet into the blockchain on demand. So you can call an oracle smart contract, it emits certain events, the oracle's backend systems notice the events and issue a transaction to the blockchain where they include the requested data. In that way the requested data is added into the blockchain and made available for any smart contract which requested the data.
So if the contract you showed us really does some Twitter verification it has to utilize oracles somewhere. As there are no direct oracle calls in the displayed code the call must be somewhere in the external contracts.
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
Without trying to interpret everything the contract does, it's obvious that there is nothing concrete about verifying Twitter handle. It has multiple calls to other external contracts which may do the verification part but impossible to know.
In general smart contracts can't interact with the rest of the world. They are fully isolated inside the EVM (Ethereum Virtual Machine) and are deterministic. All information they have must be already inside the blockchain and therefore they can't directly query external sources.
What is needed is something called oracles. They provide data from the internet into the blockchain on demand. So you can call an oracle smart contract, it emits certain events, the oracle's backend systems notice the events and issue a transaction to the blockchain where they include the requested data. In that way the requested data is added into the blockchain and made available for any smart contract which requested the data.
So if the contract you showed us really does some Twitter verification it has to utilize oracles somewhere. As there are no direct oracle calls in the displayed code the call must be somewhere in the external contracts.
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
answered 7 hours ago
Lauri PeltonenLauri Peltonen
6,6432527
6,6432527
add a comment |
add a comment |
Victor is a new contributor. Be nice, and check out our Code of Conduct.
Victor is a new contributor. Be nice, and check out our Code of Conduct.
Victor is a new contributor. Be nice, and check out our Code of Conduct.
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