testContract

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

Linagee’s contract is effectively Ethereum’s first public “Hello World” that users could call and observe behavior from. Its purpose was pedagogical rather than financial, showing that contracts were not just stored code but executable programs that anyone could interact with.

The accompanying Reddit post served as an early tutorial, walking users through ABI usage, contract addresses, and the mechanics of calling contracts long before web-based tooling or wallets existed.

On August 7, 2015, a developer known as Linagee published a simple Ethereum contract that exposed a callable function returning a string: “Hello Ethereum”. While not the earliest contract deployed on Ethereum, it was the first publicly shared example of a contract that users could meaningfully call and receive a response from.

Earlier that same day, another developer, aedigix, deployed what is widely considered the first Ethereum contract by transaction order. That contract stored an owner address but intentionally did nothing else, a design choice driven by extremely low gas limits at the time. As aedigix later explained, it was “the cheapest contract that could fit with a low gasLimit.”

Linagee’s contract followed shortly after gas limits increased enough to support basic function calls, marking the transition from inert on-chain code to interactive smart contracts.

The contract was deployed at address 0xa3483b08c8a0f33eb07aff3a66fbcaf5c9018cdc in block 49,428 and could be invoked directly via the geth console using an ABI.