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client: add FinalizedHeader/Block to use the fast finality #1797

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Aug 15, 2023
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client: add FinalizedHeader/Block to use the fast finality #1797

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21 changes: 21 additions & 0 deletions ethclient/ethclient.go
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Original file line number Diff line number Diff line change
Expand Up @@ -188,6 +188,27 @@ func (ec *Client) HeaderByNumber(ctx context.Context, number *big.Int) (*types.H
return head, err
}

// GetFinalizedHeader returns the requested finalized block header.
// - probabilisticFinalized should be in range [2,21],
// then the block header with number `max(fastFinalized, latest-probabilisticFinalized)` is returned
func (ec *Client) FinalizedHeader(ctx context.Context, probabilisticFinalized int64) (*types.Header, error) {
var head *types.Header
err := ec.c.CallContext(ctx, &head, "eth_getFinalizedHeader", probabilisticFinalized)
if err == nil && head == nil {
err = ethereum.NotFound
}
return head, err
}

// GetFinalizedBlock returns the requested finalized block.
// - probabilisticFinalized should be in range [2,21],
// then the block with number `max(fastFinalized, latest-probabilisticFinalized)` is returned
// - When fullTx is true all transactions in the block are returned, otherwise
// only the transaction hash is returned.
func (ec *Client) FinalizedBlock(ctx context.Context, probabilisticFinalized int64, fullTx bool) (*types.Block, error) {
return ec.getBlock(ctx, "eth_getFinalizedBlock", probabilisticFinalized, true)
}

// GetDiffAccounts returns changed accounts in a specific block number.
func (ec *Client) GetDiffAccounts(ctx context.Context, number *big.Int) ([]common.Address, error) {
accounts := make([]common.Address, 0)
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