357e3f6aa4
5cf44275c8test: refactor: deduplicate legacy ECDSA signing for tx inputs (Sebastian Falbesoner) Pull request description: There are several instances in functional tests and the framework (MiniWallet, feature_block.py, p2p_segwit.py) where we create a legacy ECDSA signature for a certain transaction's input by doing the following steps: 1. calculate the `LegacySignatureHash` with the desired sighash type 2. create the actual digital signature by calling `ECKey.sign_ecdsa` on the signature message hash calculated above 3. put the DER-encoded result as CScript data push into tx input's scriptSig Create a new helper `sign_input_legacy` which hides those details and takes only the necessary parameters (tx, input index, relevant scriptPubKey, private key, sighash type [SIGHASH_ALL by default]). For further convenience, the signature is prepended to already existing data-pushes in scriptSig, in order to avoid rehashing the transaction after calling the new signing function. ACKs for top commit: dimitaracev: ACK `5cf4427` achow101: ACK5cf44275c8pinheadmz: ACK5cf44275c8Tree-SHA512: 8f0e4fb2c3e0f84fac5dbc4dda87973276242b0f628034272a7f3e45434c1e17dd1b26a37edfb302dcaf380dbfe98b0417391ace5e0ac9720155d8fba702031e
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