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| 1 | +//! Demonstrates how to obtain a `DynProvider` from a Provider. |
| 2 | +
|
| 3 | +use alloy::{ |
| 4 | + node_bindings::Anvil, |
| 5 | + providers::{Provider, ProviderBuilder}, |
| 6 | + signers::local::PrivateKeySigner, |
| 7 | + sol, |
| 8 | +}; |
| 9 | + |
| 10 | +// Codegen from embedded Solidity code and precompiled bytecode. |
| 11 | +sol! { |
| 12 | + #[allow(missing_docs)] |
| 13 | + // solc v0.8.26; solc Counter.sol --via-ir --optimize --bin |
| 14 | + #[sol(rpc, bytecode="6080806040523460135760df908160198239f35b600080fdfe6080806040526004361015601257600080fd5b60003560e01c9081633fb5c1cb1460925781638381f58a146079575063d09de08a14603c57600080fd5b3460745760003660031901126074576000546000198114605e57600101600055005b634e487b7160e01b600052601160045260246000fd5b600080fd5b3460745760003660031901126074576020906000548152f35b34607457602036600319011260745760043560005500fea2646970667358221220e978270883b7baed10810c4079c941512e93a7ba1cd1108c781d4bc738d9090564736f6c634300081a0033")] |
| 15 | + contract Counter { |
| 16 | + uint256 public number; |
| 17 | + |
| 18 | + function setNumber(uint256 newNumber) public { |
| 19 | + number = newNumber; |
| 20 | + } |
| 21 | + |
| 22 | + function increment() public { |
| 23 | + number++; |
| 24 | + } |
| 25 | + } |
| 26 | +} |
| 27 | + |
| 28 | +#[tokio::main] |
| 29 | +async fn main() -> eyre::Result<()> { |
| 30 | + // Spin up a local Anvil node. |
| 31 | + // Ensure `anvil` is available in $PATH. |
| 32 | + let anvil = Anvil::new().spawn(); |
| 33 | + |
| 34 | + let signer_pk: PrivateKeySigner = |
| 35 | + "0xac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80".parse()?; |
| 36 | + |
| 37 | + let from = signer_pk.address(); |
| 38 | + |
| 39 | + // Provider with verbose types. |
| 40 | + let regular_provider = |
| 41 | + ProviderBuilder::new().wallet(signer_pk).connect(anvil.endpoint().as_str()).await?; |
| 42 | + |
| 43 | + // One can use the erased method to obtain a DynProvider from a Provider. |
| 44 | + let dyn_provider = regular_provider.erased(); |
| 45 | + |
| 46 | + // Note that the fillers set while building provider are still available, only the types have |
| 47 | + // been erased OR boxed under the hood. |
| 48 | + // This enables us to use the DynProvider as one would use a regular Provider with verbose |
| 49 | + // types. |
| 50 | + let counter = Counter::deploy(&dyn_provider).await?; |
| 51 | + |
| 52 | + println!("Counter deployed at {}", counter.address()); |
| 53 | + |
| 54 | + // Sends a transaction with required properties such as gas, nonce, from filled. |
| 55 | + let incr = counter.increment().send().await?; |
| 56 | + let receipt = incr.get_receipt().await?; |
| 57 | + assert_eq!(receipt.from, from); |
| 58 | + |
| 59 | + let number = counter.number().call().await?; |
| 60 | + |
| 61 | + println!("New number: {}", number.number); |
| 62 | + |
| 63 | + Ok(()) |
| 64 | +} |
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