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A transaction byte-encoded using the Recursive-Length Prefix (RLP) algorithm. Before Constantinople, it needs to be signed before it will be accepted by the network.

A raw transaction is a transaction encoded using the RLP algorithm.

Before Constantinople, it needs to be signed.

The result is a sequence of bytes that is ready to be posted to the Ethereum network.

See https://github.com/ethereum/EIPs/pull/208 for changes planned for Constantinople.

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